Nicotine mainly shows its action through specific nicotinic acetylcholine receptors located in the brain. It stimulates presynaptic acetylcholine receptors thereby enhancing Ach release and metabolism.
The dopaminergic system is also stimulated by it and thus increasing the concentration of dopamine in nuclear accumbens. Nicotine induces GABA release by binding to excitatory nACh receptors located on presynaptic GABA neurons.
The serotonergic system may be involved in smoking behaviour because nicotine increases the brain's serotonin secretion, nicotine withdrawal decreases serotonin levels and a selective serotonin reuptake inhibitor antagonises the response to nicotine.
Learn more about Nicotine and its effect on the brain here:
https://brainly.com/question/11174442
#SPJ4
removal of the voice box: a.laryngectomy b.esophagectomy c.pharyngectomy d.larnygectomy e.pharnygectomy
Removal of voice box or sound box is called laryngectomy.
The larynx can be removed in whole or in part through a laryngectomy (voice box). It entails making an incision (cut) over the Adam's apple region on the outside of the neck. Partial laryngectomy: In order to treat some laryngeal malignancies, only a portion of the voice box needs to be removed.
To learn more about voice box click here:
https://brainly.com/question/27008578
#SPJ4
explain how dark matter gave rise to the structure of the universe
The dark energy does not have any local gravitational effects this energy generate a repulsive force, which tends to accelerate the expansion of the universe.
Dark matter played an important role in the formation of galaxies. Many studies have shown how location of dark matter in the universe depends on the light from distant galaxies bends as it reaches toward us.
Gravity and dark energy have involved in a cosmic pull and push. Gravity pulls galaxies closer together while dark energy pushes them apart. As a result universe is expansion or contraction depends on what force dominating, gravity or dark energy.
To learn more about universe , here
brainly.com/question/9724831
#SPJ1
which statement is true about enzymes in the human body? which statement is true about enzymes in the human body? enzymes in the human body usually work best at normal body temperature. enzymes in the human body always work better as the temperature decreases. enzymes in the human body always work better as the temperature increases. enzymes in the human body work just as well at any temperature.
The correct statement is option A: enzymes in the human body usually work best at normal body temperature.
The body's normal temperature, which is around 98.6° F (Fahrenheit) or 37°C, is where most enzymes in the human body function optimally. They might still function at lower temperatures, but considerably more slowly. Therefore, option A is the right choice.
Enzymes function as biological catalysts that quicken biochemical reactions. The most popular explanation proposes that enzymes bind to the substrate molecule and create a transition state. As the reaction proceeds, an energy barrier that the substrates must cross separates the products from the substrates.
To know more about enzymes, refer to the following link:
https://brainly.com/question/14577353
#SPJ4
why is there different numbers of lobes on the right and left lungs in fetal pig. why would this be the case?
Because the left lung needs to be smaller to make room for the heart, there are differing numbers of lobes on the right and left lungs of fetal pigs.
How do the right and left lungs of a pig differ from one another?Each side of the pig lung is divided into a number of lobes. In contrast to humans, who have three lobes on one side and two on the other, pigs have four lobes on their right lung and three on their left.
How many lung lobes do pigs have compared to how many humans do?Compared to humans, who have three right and two left lobes, swine lungs have two left and four right lobes.
To know more about numbers of lobes of lungs visit:-
https://brainly.com/question/12138550
#SPJ4
Why is it important that ions being transported across a cell membrane be shielded from the interior.
In cells the lipid bilayer's core is non polar, ions that are drawn to polar surroundings would be repelled by it.
For cells to continue functioning as they go throughout their life cycle, there must be a tremendous amount of exchange. The integration of living ions and the release of waste materials required for regular operation are both possible during transportation. Simple diffusion in cells and electron transport are the ways by which ions are transported across membranes. Solutes diffuse more easily via channels made of proteins. In order to push ions against the gradient of concentration, active transport needs energy in the forms of ATP conversion, channel proteins, or pumps. These charged (polar) ions do not flow across the membrane because of their charge. They instead travel through ions.
(Why is it important that ions being transported across a cell membrane be shielded from the interior of the lipid bilayer? )
Learn more about cells
https://brainly.com/question/14098691
#SPJ4
for hfr conjugation, of the rolling cycle replication takes one gene per second to transfer, what is the result of the recipient after a 3 second conjugation?
For hfr conjugation, of the rolling cycle replication takes one gene per second to transfer, what is the result of the recipient after a 3 second conjugation then There is a copy of that in the recipient cell.
Bacterial conjugation, often known as bacterial sex, is a key method of horizontal gene transfer in which DNA is directly transferred from a donor bacterium to a receiver bacterium. The typical form of a recipient cell is aplasma or some chromosomal D. N. A. One of the components of donor cells is the H. F. R. F. DNA from chromosomes and plasmids will be transferred to a recipient cell.
To learn more about Chromosome click here:
https://brainly.com/question/12537598
#SPJ4
which antifungal drug acts by inhibiting biosynthesis of essential components of the fungal cell wall, which interferes with growth and reproduction
Conazoles is the class of drugs that acts by inhibiting biosynthesis of essential components of the fungal cell wall, which interferes with growth and reproduction.
Drugs are the chemical components that are used to cause some physiological or psychological changes in the body of an organism. If used in required amounts, the drugs act as medications. However, the excessive use of drugs can cause addiction that causes severe after-effects later or even death.
Fungal cell wall is composed of chitin, glucans and glycoproteins. It is present outside the cell membrane and has a hard outer appearance. Since it is not present in humans, it acts as the best target for anti-fungal products.
To know more about fungal cell wall, here
brainly.com/question/13600154
#SPJ4
13. would putamen neurons fire as a person is reaching for a doughnut, or in anticipation of the reach? would the firing correspond with the position of the doughnut or with the starting position of the arm? what does this suggest about the role of the putamen?
Neurons of the putamen are fired in the anticipation of the reach of the object.
Neurons of the putamen would fire in anticipation of the reach .Instead of the arm's location, the doughnut's position would be matched by this firing. This suggests that the putamen is more crucial for encoding the decision to move in the direction of a goal than the actual movement.
To learn more about neurons click here:
https://brainly.com/question/12581524
#SPJ4
if a flood causes the death of 50% of small mammals, which population would exhibit the most loss of genetic diversity in its future generations? a. 602 mammals b. 60 mammals c. 600 mammals d. 603 mammals e. 6000 mammals
60 mammals population would exhibit the most loss of genetic diversity in its future generations.
The correct option is B.
Why is genetic diversity?The ability of communities to adapt to changing situations is facilitated by genetic variety. More diversity increases the likelihood that certain members of a group will have allele variations that are appropriate for the environment. Those people have a higher chance of living long enough to have children who carry that allele.
Why is genetic diversity important for species?Genetic variety is alluded to as this. It improves a species' and population's resistance to diseases, pests, climatic changes, and other pressures. Their ability to adapt and evolve is supported by gene variants.
To know more about Genetic diversity visit:
https://brainly.com/question/14696671
#SPJ13
name the four main components of macconkey agar. which makes the agar selective? which component makes the agar differential? for which organism type is it selective? for which group is it differential
MacConkey agar (MAC) is selective and differential bacterial culture media.
was, developed by Alfred Theodore MacConkey in 20th century.
It contains the essential nutrients required for microorganism growth.
MacConkey agar contains 4 components-
1. lactose,
2. bile salts
3. crystal violet
4. neutral red
Bile salts and crystal violet act as selective agents and they make the agar selective
Selective because it is selective to gram negative bacteria.
example, staphylococcus gives pale pink color in M.A because it is able to grow in this medium.
Differential because as it contains lactose it differentiates between gram negative lactose fermenter and gram-negative non-fermenters.
To know more about MacConkey agar,
https://brainly.com/question/9188007
#SPJ4
what is the evolutionary benefit to meiosis in reproduction? select only one answer choice. group of answer choices meiosis produces gametes with half the required number of chromosomes that the offspring will need. meiosis produces gametes that are identical to their parent cells. meiosis produces gametes with new combinations of alleles in the chromosomes. meiosis allows for growth and plasticity in multicellular organisms
The evolutionary benefit of meiosis in reproduction is meiosis produces gametes with new combinations of alleles in the chromosomes. Therefore, the correct answer is the third option.
Meiosis is the process of chromosomal reduction that leads to the production of gametes (sex cells) needed for sexual reproduction. It only appears in eukaryotic cells that only plants, animals, and fungis have.
In this process, the double set of chromosomes is reduced into a single set. The single sets combine in sexual reproduction, resulting in double-set offspring. That allows a new combination of alleles in the new gametes while conserving the chromosomal number of the species.
Learn more about meiosis at https://brainly.com/question/8253366
#SPJ4
How can Base Substitutions, Deletions, and Insertions cause changes in DNA and possibly lead to new traits.
Base Substitutions, Deletions, and Insertions cause changes in DNA and possibly lead to new traits through mutation process
DNA is a dynamic and adaptable molecule and as such the nucleotide sequence found within it are subject to change as the result of a phenomenon called mutation and depending on how a particular mutation modifies an organism genetic makeup and it can prove harmless and helpful and sometime a mutation may even cause dramatic changes in the physiology of an affected organism and mutation can be grouped into two main categories based on where they occur and that are somatic mutation and germ line mutation
Base Substitutions : they involve the swamping of one nucleotide for another during DNA replicationDeletions : is the type mutation that involve the loss of one or more nucleotides from a segment of DNA Insertions : is the type of mutation that involves the addition of one or more nucleotides from a segment of DNAKnow more about Base Substitutions
https://brainly.com/question/685276
#SPJ1
The table shows the energy that is stored in three types of organic molecules.
Energy Storage in Humans
Free glucose in blood has 4 kilocalories per gram, 40 kilocalories of energy storage, and a few minutes of life support time. Glycogen has 4 kilocalories per gram, 600 to 1600 kilocalories of energy storage, and 1 day of life support time. Lipids have 9 kilocalories per gram, 100,000 kilocalories of energy storage, and 30 to 40 days of life support time.
What is the best conclusion based on this data?
Blood is a primary location for energy storage.
Fat molecules contain more energy-containing bonds than simple sugars.
A gram of glycogen has twice as much energy as a gram of fat.
The human body stores approximately 1,000 kcal of glucose.
Based on the data shown, the best conclusion would be that fat molecules contain more energy-containing bonds than simple sugars. Option 2.
Drawing conclusions based on dataFrom the available data shown in the illustration, the following can be deduced:
1 gram of free glucose = 4 kilocalories, 40 kilocalories of energy storage, few minutes of life support.1 gram of glycogen = 4 kilocalories, 600 to 1600 kilocalories of energy storage, 1 day life support.1 gram of lipid = 9 kilocalories, 100,000 kilocalories of energy storage, 30 to 40 days of life support.Based on the information extracted, one can see that glucose offers the lowest amount of energy, storage energy, and life support time per gram.
On the other hand, lipid appears to offer the highest energy, storage energy, as well as life support time. Glucogen has values that lie in-between glucose and lipid.
In other words, fats being a type of lipid appears to contain more energy-containing bonds than simple sugar, glucose.
More on data interpretation can be found here: https://brainly.com/question/18097196
#SPJ1
Answer:B
Explanation: took the test
What is another term for undifferentiated cells?
A. epithelial cells
B. stem cells
C. muscle cells
D. nerve cells
in conditioning birds and rats, you find that it is easier to condition birds with vision-relevant stimuli than with taste-relevant stimuli, and it is easier to condition rats with taste-relevant stimuli than with vision-relevant stimuli. these results are true because
In the vision relevant stimuli, the result are true due to Law of effect.
In physiology, a stimulus is a detectable exchange in the bodily or chemical shape of an organism's inner or external surroundings. The capability of an organism or organ to detect external stimuli, so that the right reaction may be made, is known as sensitivity.
Stimuli is a detectable trade within the inner or outside surroundings. That which influences or causes a brief increase of physiological activity or response inside the entire organism or in any of its parts.
Detection of stimuli is crucial for adaptation, or adjusting to changes in the surroundings. The human frame is ready with response mechanisms that allow us to alter to changes inside the surroundings in order for survival.
Learn more about Stimuli here:-https://brainly.com/question/21347989
#SPJ4
What are the effects of fossil fuels in the in environment ?
Answer:
1. release large amounts of carbon dioxide
2. releases green house gas which traps heat into the atmosphere
3. air pollution/ global warming
4. can cause acid rain
Explanation:
bacterial colonies can be transferred from a master plate to secondary plates in the same configuration using a transferring agent such as a sterile velvet cloth. this technique is known as .
Bacterial colonies can be transferred from a master plate to secondary plates in the same configuration using a transferring agent such as a sterile velvet cloth this technique is known as replica plating .
Replica plating is the technique by which each colony is inoculated onto another plate according to a numbered pattern. replica plating allows each clone to be tested different variety of methods, while a master plate is always reserved to pick the clones .
Replica plating saves time and labor of lab technician and helps them to work of larger population of bacterial colonies by using isolation method .
To learn more about Replica plating , here
brainly.com/question/1992415
#SPJ4
protozoal (parasitic) infection associated with aids that may cause pneumonitis, hepatitis, and encephalitis: a.kaposi sarcoma b.toxoplasmosis c.pneumocystis jiroveci (formerly carinii) pneumonia d.cryptococcus e.herpes simplex
protozoal (parasitic) infection associated with aids that may cause pneumonitis, hepatitis, and encephalitis: b.toxoplasmosis
What causes pneumonia most frequently in AIDS patients?One of the most frequent and potentially fatal causes of pneumonia in patients with HIV is an infection with the bacterium Streptococcus pneumoniae, often known as Pneumococcus. For protection against Streptococcus pneumoniae infection, people with HIV should receive a vaccination.
Immune system dysfunction is the primary cause of fungus infection (either local immunity over the skin or mucous membranes or systemic immunity as seen in the case of certain conditions such as diabetes ).
The most frequent cause of encephalitis is the herpes simplex virus, which also causes cold sores, varicella zoster virus, which causes chickenpox and shingles, measles, mumps, and rubella viruses, and encephalitis.
Learn more about encephalitis refer
https://brainly.com/question/13962288
#SPJ4
Question
What is the purpose of a drug ad placed by a drug company that mentions a medical condition, but not a drug name?
The main purpose is to increase people’s awareness of a medical condition.
The drug company hopes people will demand that the government spend money on research for the condition.
The goal is to get people to ask their doctor about drugs that might treat a condition.
The purpose is for people to join an organization that works to help the condition.
.
Explanation:
to get people to ask their doctor about drugs that might treat a condition
true or false: pachycephalosaurs have a frill, or margin of bone that protrudes off the back of the skull. group of answer choices
TRUE-pachycephalosaurs have a frill, or margin of bone that protrudes off the back of the skull.
Pachycephalosaurs, which means "thickheaded lizard" in Greek, was a small family of dinosaurs with an astonishingly high entertainment value. The skulls of these two-legged herbivores ranged from faintly thick to truly dense (in later genera like Stegoceras). It is popular for having a bigger, bone dome a top its skull which was up to 25 cm (10 in) thick and sheltered its tiny brain. The skull was short and had large, rounded eye sockets that faced forward, indicating that the animal had good eyesight and could see in both directions. Pachycephalosaurus had a short muzzle and a pointed beak. The teeth were tiny, with crowns shaped like leaves.
Learn more about Pachycephalosaurs here:
https://brainly.com/question/28286401
#SPJ4
which of the following is correct about primary and secondary metabolism? group of answer choices primary and secondary metabolism are both essential for all plants to survive over the short-term (days) seondary metabolism is essential for short-term survival (days) but primary metabolism is different for different species and is only important for longer term survival including reproduction primary metabolism is common to all plants but secondary metabolism may be different in different plants primary metabolism involves pathways which were discovered first, secondary metabolism involves pathways which were discovered later
It is true that "Primary metabolism is common to all plants but secondary metabolism may be different in different plants."
The immediate outcomes of metabolic activities are referred to as metabolites. Enzymes in our bodies act as catalysts for these to carry out particular tasks. These metabolites are divided into two broad categories, primary and secondary, due to the body's numerous processes.
Primary Metabolites: Primary metabolites are produced as a result of the fundamental metabolic functions induced by body enzymes. Your body's functions, like cell growth, are aided by these in turn. Additionally, these metabolites aid in cellular activity maintenance.
Secondary Metabolites: Primary metabolites produce byproducts known as secondary metabolites. Naturally, these are not directly involved in bodily functions like cell growth and maintenance. Consequently, they also do not constitute central metabolites.
Basic life processes involve primary plant metabolites; Consequently, they are roughly comparable in all living cells. Secondary plant metabolites, on the other hand, are products of subsidiary pathways like the shikimic acid pathway.
Know more about metabolites here: https://brainly.com/question/15094735
#SPJ4
Someone please help...
Construct a model explaining the seasonal (black curve) fluctation of atmospheric CO2 at the global scale.
Thank you☆
The annual changes in carbon dioxide are caused by seasonal plant growth, whereas the cumulative rise over many years is due to a combination of fossil fuel consumption, deforestation, and cement production.
What is the fluctuating atmospheric CO2 at the global scale?Although photosynthesis also takes place in the oceans, only land-based photosynthesis drives the seasonal cycles, since very little of the CO2 produced there actually enters the atmosphere.
Therefore, Since seasonal CO2 swings are a result of photosynthesis, areas with more vegetation will see more variations.
Learn more about atmospheric here:
https://brainly.com/question/14989493
#SPJ1
What is the best method of checking the temperature of a delivery of fresh fish?.
Answer:
The best method of checking the temperature of a fresh fish, from a delivery is, to "Insert a thermometer probe in the thickest part of the fish".
Explanation:
Hope this helps!!!
What's a good format for biology CER/Essay?
ardi s intermediate form of bipedality included the use of: a. longer hind limbs for clinging and leaping. b. palms and feet to move along tree branches. c. a tail. d. none of the above.
In ardi's intermediate type of bipedality, moving over tree branches with the palms and feet is incorporated.
The capacity to stand erect and move on two legs is known as bipedalism. Only humans employ this position as their main form of propulsion, however many other primates can stand up and move around for brief periods of time.
Bipedality may have started as early as 6 million years ago, according to fossil evidence. Our ancestors, however, made their first steps as devoted bipeds with Australopithecus, an early hominid that emerged in Southern and Eastern Africa between 4 and 2 million years ago. However, little is still known by scientists regarding the conditions that gave rise to this feature.
Learn more about Bipedality here:
https://brainly.com/question/28198779
#SPJ4
4. Identify possible solutions (for hurricanes).
Solution #1:
Solution #2:
Solution #3:
Solution #4:
Solution #5:
Hello..!
4. Identify possible solutions (for hurricanes).
Not burningDo not litternot felling treesDo not throw waste into the seaSave water (No votes a lot)I don't know if you meant that and if not here is another way :v
Buy your groceries before the hurricaneDo not leave homeIf you are in the hurricane keep calmProtect your house with anticyclonic curtains.Have emergency lamps.I hope those of the 2 have served you.
Greetings.
How much ATP is made throughout the course of Glycolysis, Krebb’s Cycle and the ETC? Account for any ATP spent, in which phase the ATM production/spending occurs, and the type of ATP production in each case. When the type is oxidative phosphorylation, state which molecules (NADH or FADH2) are producing ATP and how much.
The amount of ATP generated during all cellular respiration is 38 ATP molecules per glucose molecule (2 ATP glycolysis, 2 ATP Krebs cycle, and 34 ATP oxidative phosphorylation). During this process, NADH and FADH₂ are combined with oxygen to generate ATP.
What is the cellular respiration process?The cellular respiration process refers to a series of metabolic pathways which include Glycolysis, Krebb’s Cycle and oxidative phosphorylation (it in turn includes the electron transport chain or ETC) in order to generate ATP, the energy coin of the cell.
In regard to the production, 2 ATP molecules derive from glycolysis, 2 ATP molecules derive from the Krebs cycle, and 34 ATP molecules derive from oxidative phosphorylation.
Therefore, with this data, we can see that cellular respiration is able to produce 38 molecules of ATP per each glucose that enters into the process.
Learn more about the cellular respiration process here:
https://brainly.com/question/14130996
#SPJ1
enteropeptidase deficiency is an inborn error of metabolism that causes malabsorption of protein. the most likely explanation for this malabsorption is that in the absence of enteropeptidase, the only protease zymogen that could be converted to its active form is:
The only protease zymogen that could be converted to its active form in the absence of enteropeptidase is chymotripsinogen.
Trypsinogen is transformed into active trypsin by enteropeptidase, which also activates several pancreatic zymogens in addition to hydrolyzing a few peptide links in specific dietary proteins. Enteropeptidase is a crucial enzyme in the digestion of dietary proteins because of this, and its lack may cause severe protein malabsorption.
Trypsinogen, which is enteropeptidase's main substrate, undergoes a limited amount of proteolysis to release trypsin with catalytic activity. By limited proteolysis, trypsin then acts on the 4 other zymogens to release chymotrypsin, elastase, and carboxypeptidases A and B that are catalytically active.
To know more about trypsinogen, refer to the following link:
https://brainly.com/question/14307407
#SPJ4
Deafness in cocker spaniels is inherited. the allele for deafness (d) is recessive to the allele for hearing (d). two cocker spaniels that are heterozygous for hearing are mated together. what is the chance that a puppy will be deaf?
One way that regulation is often studied is by examining the effects of mutations. For example, mutations within the parts of the lac operon have been well studied. Which of these mutants would be considered a constitutive mutant?.
The mutant so one can be taken into consideration as a constitutive mutant is a mutation withinside the gene for the repressor.
In the sphere of biology, a constitutive mutant may be defined as a mutation that outcomes withinside the overproduction of a gene. This situation takes place due to the fact the gene expression for that unique gene turns into uncontrollable.
A constitutive mutant might also additionally motive a mutation to arise withinside the repression of a gene. Repressors are proteins that prevent gene expression for a selected gene.
If, because of a mutation, a repressor is not capable of prevent the gene expression, then this may be a constitutive mutation.
To learn more about mutant, click here:
https://brainly.com/question/15353401
#SPJ4