The reflex arc is the sequence of events since a stimulus reaches the body, until the body reacts to it. The correct order is a, b, d, e, c.
What is the reflex arc?The reflex arc refers to the sequence of events since the body receives an external stimulus until it reacts to it.
In general terms,
A stimulus of varying nature reaches the body. The peripheric nervous system -PNS- receives the stimulus and sends this information to the central nervous system -CNS-. The CNS processes the information and sends another signal as a response to the stimulus.This mechanism is known as the reflex arc.
Five elements compose the reflex arc, which are receptors, three types of neurons, and effectors.
There are three types of neurons involved in the mechanism:
• Afferent or sensorial neurons
• Interneurons
• Efferent or motor neurons
Action:
Ascending branch1) The stimulus reaches the body and is received by the specialized sensory receptors.
2) Information is received by these receptors and converted from stimuli energy (temperature, pressure, light, etc.) to action potential energy.
3) Afferent neurons, placed in the dermis and epidermis, receive information from receptors, react and send the information to the central nervous system as nerve impulses.
Descending branch4) Once the information reaches the central nervous system, it is processed by the interneurons that analyze it before sending a response.
5) Interneurons manage many sensorial signals, evaluate and compare them, and send a motor response.
6) Efferent neurons receive information from the interneurons and are stimulated to carry these new signals from the central nervous system to the cells of the effector organs. The effector organ can be a muscle or a gland.
7) Finally, the target tissue responds to the stimulus as a contraction, if it is a muscle, or as hormones release if it is a gland.
In the exposed example, the corrcet order is
a- A receptor detects a signal.
b- A sensory neuron sends a signal to the spinal cord.
d- A relay neuron sends a signal to a motor neuron.
e- A muscle receives a signal to contract.
c- A bone moves.
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Why can the use of fertilizers, pesticides, and industrial chemicals unintentionally
harm a community's water supply?
Answer:
Run off
Explanation:
The top soil can produce runoff if it rains heavily and travel with the water. The pesticides in the water are harmful to our body when consuming it. The pesticides are in the topsoil, therefor when the soil runs into the water system it is now contaminated with pesticides.
step-by-step plan for dealing with a chemical splashed in your eyes.
Explanation:
go to the nearest eye wash station open ur eyes and let the water wash out the chemicals.
The Hawaiian Islands are located in the middle of the Pacific plate, but they contain volcanoes. What
accounts for the volcanoes on these islands even though they aren't found along a plate boundary?
Explanation:
This hot spot partly melts the region just below the overriding Pacific Plate, producing small, isolated blobs of magma. Less dense than the surrounding solid rock, the magma rises buoyantly through structurally weak zones and ultimately erupts as lava onto the ocean floor to form volcanoes.
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Which of the following pairs of organisms is most closely related?
A. Cat and amoeba
B. Kangaroo and salmon
C. Lizard and sponge
D. Cat and kangaroo
Answer:
D
Explanation:
They are both mammals.
______ 1. What law protects plant and animal species in danger of extinction? the U.S. Fish and Wildlife Service c. the species recovery plan the Endangered Species Act d. the captive breeding plan
the answer is c
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Answer:
the U.S. Fish and Wildlife Service
Explanation:
it assists with efforts to recover endangered species, conserve migratory birds, preserve wildlife habitat, safeguard fisheries, combat invasive species and promote international wildlife conservation.
You are at a conference for a fellow scientist who is giving a lecture in a field you
are both researching: human evolution and ancestry. In his lecture, he compares
many of the behaviors of humans and Chimpanzees, and compares the
behaviors of humans and Orangutans. He concludes that we are more closely
related to Orangutans than Chimpanzees. Is he correct?
Answer:
incorrect
Explanation:
This is an incorrect statement as orangutans are the most distant relatives of humans among the Great apes and chimpanzees are the closest.
What is the evolutionary relationship?
The link drawn between different species of organisms considering their evolutionary history is the evolutionary relationship between these species. Genome sequencing is a method to study evolutionary relationship between the organisms of different species.
The humans, orangutans, gorillas and chimpanzees are grouped together in a family called as as the Hominidae. The Genome sequencing of humans, chimpanzees and orangutans revealed that humans and orangutans share about 97% of their DNA. This is much less than humans and chimpanzees which share 99% of their DNA.
Therefore, the statement that humans are more closely related to orangutans than chimpanzees is an incorrect statement.
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Which explanation provides support for continental drift theory? O Dinosaurs lived on many continents. Coal fields match up across continents. Tropical plant fossils were found in warm areas. Similar rock types are found across continents.
Answer:
Similar rock types are found across continents
Explanation:
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Similar composition of rocks are present across continents that support the theory of continental drift.
Similar rock types are found across continents is the evidence that support the continental drift theory because at the boundaries of two continent there must be similar type of rock present. Scientist Alfred Wegener presented Continental drift theory in the early 20th century.
Wegener noticed similarities between two continents when he pieced together maps of Africa and South America. He noticed that mountain ranges present on both continents line up to each other which means they are made of similar type of rock so we can conclude that similar types of rock are present across continents.
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Which of the following evidence must be stored in an airtight container? Bullet Casings, Gun Magazines, Hair, Wet Fluids, Tire Track Casts
Answer:
gun magazines
Explanation:
the others don't make sense.
Several centers (and their associated motor tracts) in the cerebrum, diencephalon, and brainstem, which may issue somatic motor commands as a result of processing performed at a subconscious level, were long known as the ________, but is actually now considered inaccurate and misleading.
Answer:
The correct answer is "reticular formation".
Explanation:
The missing options of this question are:
A) medial lemniscus
B) pyramidal system
C) anterolateral system
D) reticular formation
E) extrapyramidal system
The correct answer is option D) "reticular formation".
The term "reticular formation" was coined to mention a set of interconnected nuclei located along the brainstem, including the cerebrum, diencephalon, and the brainstem itself. Nowadays this term is considered inaccurate and misleading, since it was never well defined and some authors may include some structures that other author do not consider as part of the "reticular formation".
DNA is the genetic material that makes up living things, and folic acid plays an important role in the formation of DNA. Jon wants to study the effect of folic acid on DNA formation in microbes. Which statement accurately describe the variables in this study? A. The amount of folic acid and DNA synthesized are both dependent variables. B. The amount of folic acid and DNA synthesized are both independent variables. C. The amount of folic acid is the independent variable, and the DNA synthesized is the dependent variable. D. The amount of folic acid is the dependent variable, and the DNA synthesized is the independent variable. E. The amount of folic acid and DNA synthesized are neither dependent nor independent variables.
Answer:
The correct answer is - C. The amount of folic acid is the independent variable, and the DNA synthesized is the dependent variable.
Explanation:
DNA is the genetic material of most of the living organisms. In this question, Joe wants to study to see the effect of folic acid on the synthesis of the DNA. Folic acid ae the essential nutrients or vitamin for the synthesis of nitrogen bases of the DNA that are purines and pyrimidines. A dependent variable and an independent variable are two important part of any experiment.
A dependent variable is a variable being tested and measured. In the experiment Jon is conducting, the amount of DNA becomes a dependent variable that is being tested and measured in the presence of folic acid. And folic acid is the independent variable tested to check the formation of DNA in bacteria.
Thus, the correct answer is - C. The amount of folic acid is the independent variable, and the DNA synthesized is the dependent variable.
Answer:
The amount of folic acid is the independent variable, and the DNA synthesized is the dependent variable.
Explanation:
Edmentum
what type of root found in the bryophyllum ?
The root that found in the bryophyte is Rhizoid
Which sustainable practice is paired correctly with its impact on the environment? Using bamboo results in an increased use of forest trees. Practicing contour plowing results in a need for more land. Setting irrigation systems to run longer results in a reduction of water use. Building more wind farms results in a reduction of fossil fuel use.
Answer:
build more wind farms results in a reduction of fossil fuel use.
Explanation:
no comment
During a discussion about antimicrobial agents, the instructor explains to the nursing students that there are two major methods used to classify antimicrobial drugs. What are those two major methods
Answer:
The correct answer is - Susceptible organism and mechanism of action
Explanation:
1. susceptibility is a term utilized when microorganisms, for example, microscopic organisms and fungi can't develop within the sight of at least one antimicrobial medications. susceptibility testing is performed on microscopic organisms or parasites causing a person's infection after they have been recovered in a culture of the specimen .
A bacterial strain is supposed to be helpless to a given anti-microbial when it is restrained in vitro by a concentration of this medication that is related with a high probability of therapeutic achievement.
2. According to their primary actions on microbial cells, antimicrobial antibiotics can be divided into four categories: 1. Inhibitors of the biosynthesis of the bacterial cell wall 2. Inhibitors of the bacterial protein synthesis 3. Inhibitors of the nucleic acid metabolism 4. Alteration of Cell Membranes.
1. evaporation process by which liquid water changes into a gas
2. infiltration process by which solid water (ice, snow) changes directly into a gas
3. precipitation process by which precipitation soaks into the ground
4. sublimation release of water vapor into the air by plants
5. transpiration the release of water from the atmosphere
Answer:
1. Evaporation process by which liquid water changes into a gas.
2. Sublimation process by which solid water (ice, snow) changes directly into a gas.
3. Infiltration process by which precipitation soaks into the ground.
4. Transpiration release of water vapor into the air by plants.
5. Precipitation the release of water from the atmosphere.
Explanation:
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Observe 5 different forms of life in your garden, orchard, living beings found with their characteristics and give an explanation of these forms.
Answer:
Explanation:
After going to my garden and observing carefully I have come to the conclusion that there are many forms of life.
The most common way of life is plants: which are mostly green, give us oxygen and some give us fruit or food.
Other forms of life that I observed were:
Birds: vertebrate animals that live on the fruits of trees, sing in the morning and have plumageThe worms: invertebrate animals that serve as compost for the earth. Ants, insects that work in an orderly way and that live in colonies under the ground.Flies, flying insects that help decompose animals.In each of the three systems, determine the state of entropy (low or high) when comparing the first and second: i. the instant that a perfume bottle is sprayed compared with 30 seconds later, ii. an old 1950s car compared with a brand new car, and iii. a living cell compared with a dead cell.
a) i. low, ii. high, iii. low
b) i. low, ii. high, iii. high
c) i. high, ii. low, iii. high
d) i. high, ii. low, iii. low
Answer:
a) i. low, ii. high, iii. low
Explanation:
. There are different methods of sowing the seeds. Which one of the methods given below is not the methods of sowing seeds used by the farmer?
Answer:
A) Broadcasting B) Seed-drill
Explanation:
Options of sowing seeds are given below.
A) Broadcasting B) Seed-drill C) Transplanting D) Scattering E) None of these
Farmers used two methods for sowing of seeds such as broadcasting and seed drilling. Broadcasting is a method of seed sowing in which seeds are scattered in the field by hands or machines while seed drill is another method of sowing in which a device or machine is used which bury the seed at certain depth and at proper position in the field. In seed drilling method, seeds are sowing in lines while in broadcast, seeds are sown in every part of the field.
If DNA replicated conservatively instead of semi conservatively, what would the banding pattern look like in a tube containing heavy nitrogen DNA (15N) grown in regular, or light, nitrogen (14N) for 1 generation? A. There would be one band of heavy DNA and one band of light DNA. B. There would be one band of intermediate DNA, and one band of light DNA. C. There would be one band of heavy DNA and one band on intermediate DNA. D. There would be one band of intermediate weight DNA.
Answer:
A. There would be one band of heavy DNA and one band of light DNA.
Explanation:
First, we must exclude that a 15N DNA is related to a heavy nitrogen, while a 14N DNA is related to a light nitrogen.
After that, it is important to understand what conservative DNA replication would be. This type of replication implies that the strands of the parental DNA would not be separated to form the daughter strands. Thus, the replication occurs with the DNA strands together, the daughter strands of newly formed DNA are also formed together, in this case. Thus, the parental 15N DNA would form another 15N DNA molecule, the same goes for the 14N molecule. With that we can say that the answer to your question would be "there would be a heavy DNA band and a light DNA band."
A sodium atom that has lost an electron comes near a chlorine atom that has gained an electron. What happens?
A. They form a peptide compound.
B. They form a covalent bond.
C. They form a hydrogen bond.
D. They form an ionic bond.
Answer:
The answer is D.
Explanation:
When metal react with non-metal, it will form an ionic bonding.
(Correct me if I am wrong)
A sodium atom that has lost an electron comes near a chlorine atom that has gained an electron. Then they form an ionic bond.
So, option D is correct one.
What is ionic bond?The bond formed by complete transfer of electron/electrons between atoms is called ionic bond. The ionic bond generally formed between metals and non-metals elements.
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Which statement describes Earth?
O It is an outer planet.
O It is a gaseous planet.
O It was formed from gas and dust.
O It has a thick atmosphere of hydrogen and helium.
Answer:
it is a terrestrial planet.
It was formed from gas and dust.
Explanation:
the last one is wrong is not thick and the first one is wrong because it is an innner planet.
Answer: D.
Explanation: It has a thick atmosphere of hydrogen and helium.
Cytochalasin D is a drug that prevents actin polymerization. A cell treated with cytochalasin D will be inhibited from doing all of the following EXCEPT:________.
a) extend pseudopodia
b) move vesicles within a cell
c) contract muscle fibers
d) divide in two
Cytochalasin D is a drug that prevents actin polymerization. A cell treated with cytochalasin D will be inhibited from doing all of the following except move vesicles within a cell. Hence option b is correct.
What is actin polymerization?Actin polymerization is defined as a monomers associate with and disassociate from the ends of actin filaments in this reversible process. Actin filament polymerization typically takes place over three phases: a steady state phase, an elongation phase, and a nucleation phase. Actin filament assembly involves the phases of nucleation, elongation, and steady state.
A cell-permeable fungus toxin called cytochalasin D attaches to the barbed end of actin filaments and prevents both subunit interaction and separation. About 20 known mold-derived substances collectively known as cytochalasins impact actin stress fibers and cause fast actin depolymerization.
Thus, cytochalasin D is a drug that prevents actin polymerization. A cell treated with cytochalasin D will be inhibited from doing all of the following except move vesicles within a cell. Hence option b is correct.
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Which of these would be considered a transgenic organism? a human treated with insulin produced by E. coli bacteria a rat with rabbit hemoglobin genes a bacterium that has been treated with a compound that affects the expression of many of its genes a fern grown in cell culture from a single fern root cell a houseplant propagated from the cuttings of another houseplant
Answer:
a rat with rabbit hemoglobin genes
Explanation:
When the genome of an organism is modified in the field of genetic engineering,by transplanting the gene(DNA) from one organisms to another,(by vectors) or alteration of the gene components,the resulting organism produced or formed is called Transgenic organism.
This process of genetic engineering makes use of recombination of genes to alter the genome of the transgenic organism.
Thus by transferring to rat ( the DNA for Hb) as the rabbit Hb,the gene( or genome) for producing Hb in tats has been modified by that of rabbit.Hence Rat is said to transgenic.
Besides animals crop plants are also genetically modified.Thus the genome of some crops are altered to resist herbicides and pesticides. Some species of rice (golden rice)have been modified to add certain vitamins to improve the nutritional values.
Genetically modified bananas as edible vaccines are another example
What is most likely to happen to a population of mice that becomes isolated on an island?
Many different species will form as they evolve and fill different niches on the island.
The population of mice will adapt to life on the island but will still be able to breed with the mainland population.
Many different species that are capable of breeding with each other will form.
The population of mice will evolve into a new species of mouse that is adapted to all the different niches that are found on the island.
The most likely thing that will happen to a population of mice that becomes isolated on an island is Many different species will form as they evolve and fill different niches on the island.
What is population?Population refers to group of organisms occupying a specific geographical lol cation and interacting with their environment at a particular time.
Therefore, The most likely thing that will happen to a population of mice that becomes isolated on an island is Many different species will form as they evolve and fill different niches on the island.
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Answer: D.) The most likely thing that will happen to a population of mice that becomes isolated on an island is Many different species will form as they evolve and fill different niches on the island.
Explanation: got 100 on the test
Which of the following is not an advantage that glycogen provides to muscle cells in which it is stored? Group of answer choices It is available for quick energy spurts. It requires no energy to mobilize the glucose residues for metabolism. It gives anaerobic metabolism a boost.
Answer: C: It gives anaerobic metabolism a boost
Explanation:
Glycogen doesn't really have anything to do with anaerobic metabolism, but both other statements are correct
Which of these must exist for natural selection to cause change ?
Answer:
The answer is A.
Explanation:
what converts solar energy (sunlight) into chemical energy through photosynthesis
Explanation:
Photosynthesis in plants converts solar energy into chemical energy using electrons and protons from water. ... The electrons go to the chlorophyll, while the protons contribute to a proton gradient that is used to power the synthesis of a second energy-carrying molecule,
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Answer:
Hello!
Your answer is PLANTS!
Explanation:
During Photosynthesis, PLANTS absorb the radiation from the sun (sunlight/heat) and convert it into chemical energy (glucose/starches etc)
The green pigments on the leaves are called CHLOROPHYLL and the main purpose of them is to act like Solar Panels and absorb the light energy (solar energy)
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Is water biodegradable or non - biodegradable?
Answer:
Biodegradable
Explanation:
Exotoxins are Question 8 options: only released after a cell is damaged or lysed. proteins. lipopolysaccharides. secretions that always target nervous tissue. antiphagocytic factors.
Answer:
The correct answer is proteins.
Explanation:
The exotoxins are proteinaceous in nature, they are the toxins, which are discharged from a living bacterium and are also discharged at the time of bacterial lysis. The exotoxins harm humans, however, not all exotoxins generated harm human beings.
Some are even created to perform an essential function in bacteria physiology like regulating functions of the cell, resisting bacteriophages, or quorum sensing. The three prime kinds of exotoxins are type I exotoxins or superantigens, type II toxins or exotoxins that damage host cell membranes, and type III toxins or A-B toxins that interfere with the function of the host cell.
Question 5 of 10
A whale is able to move its fins in the ocean because of energy it obtains
directly from
O A. wind
O B. food
O C. the Sun
D. ocean currents
Modern domesticated pigs are descendants of the wild boar(Susscrofa). Through the domestication process, human have artificially selected for certain traits. Identify two of these traits, and briefly explain how they benefit modern society. Be sure to identify the trait, explain why it was artificially selected and how it benefits modern society.
Answer:
Meat for food and small size for pets
Explanation:
Artificial selection is the process by which humans control desirable phenotypic characteristics in plants and animals by applying selective breeding techniques to perpetuate these traits in the population. A example of artificial selection includes the process of domestication of modern pigs (Sus domesticus). It has been shown that the modern pigs derived from the wild boar (Sus scrofa), which were domesticated separately 9,000 years ago in China and Western Asia. For example, by artificial selection, humans have domesticated moderns pigs to use them as livestock for direct consumption (i.e., for their meat). Moreover, there are pig populations that have been artificially selected as pets (e.g., miniature Vietnamese Pot-Bellied pigs).