At about day 26, the blastocyst will form chorionic villi, which sprout from the blastocyst's outer membrane and make contact with the maternal blood supply.
The tiny, finger-like chorionic villi are extensions of the placenta with the same genetic makeup as the growing fetus. Testing for further genetic abnormalities and illnesses may be possible, depending on the family history and the availability of lab tests at the time of the surgery.
The placenta contains chorionic villi, which significantly increase the surface area via which the fetus can access the maternal blood supply.
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a positive babinski's sign is seen when the lower motor neuron of the pyramidal pathway is damaged. true false
a positive babinski's sign is seen when the lower motor neuron of the pyramidal pathway is damaged. it is a false statement.
What is babinski's sign?A neuro-pathological cue included within the foot's Plantar Reflex is known as Babinski's sign. The typical adult Plantar Reflex is characterised by a downward flexion of the toes in the direction of the stimulus when it is elicited by a blunt stimulus to the sole of the foot. When the Hallux (big toe) extends dorsally in response to the same plantar stimulus, this is known as the Babinski's sign. Despite the fact that the plantar reflex in infants causes a reaction like the sign, Babinski's sign in adults can be an indication of corticospinal tract damage or a lesion, and recognition of the sign is still one of the least invasive ways to confirm a diagnosis of upper motor neuron injury.
The reflex hammer, created by Babinski in 1912 as a prototype, became one of a modern neurologist's indispensable tools as the sign became so ingrained in neurological doctrine. Babinski's sign is still referred to as "the most colourful exam finding in neurology" in current neurological examination texts. All things considered, Babinski's sign and other tests of the plantar reflex (such as the Chaddock sign and Cornell sign) serve as helpful reminders of the value of a thorough physical examination and the fact that, with the right care and attention to detail, a doctor can confidently make diagnoses using simple, concise, and interactive methods.
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identify the major structures and functional areas of the cerebral cortex and cerebrum including the basal nuclei
The cerebrum, cerebellum, and brainstem are the three major components of the brain. The brain's main structure, the cerebrum, is made up of the right & left halves.
Describe the cortex.Your cerebral cortex, which is located on atop of your cerebrum, is its outer layer. The greatest part of your brain is called your cerebrum. The corpus callosum, a network of nerve fibers, connects the hemispheres together.
What bodily organ is the cortex?The term "cortex," which is Latin for "bark," refers to the cerebrum's outer layer of gray matter. Due to it's own folds, the brain has a huge surface area and makes up nearly half of the weight of the brain. There are two parts to the cerebral cortex:
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Besides the supinator, which other muscle is a powerful supinator of the forearm?.
Besides the supinator, the other muscle that is a powerful supinator of the forearm is: the biceps brachii. The biceps brachii is responsible for elbow flexion and forearm supination.
What is the biceps brachii?The biceps brachii is a large, thick muscle on the front of our upper arm that is located between the shoulder and the elbow. This muscle often looks like a horseshoe shape. The biceps brachii’s primary function is as an extension of the elbow joint.
While the biceps are located on the front upper arm, there are other muscles known as the triceps on the back of the upper arm, which are responsible for arm extension.
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What would be a good title for the graph? Pls help due today
Summarize Your Data in Plain English.
Left Justify Chart Captions Below Figure.
Keep Chart Captions Simple and Short.
Simplify Your Information.
Include Units of Representation.
Don't Forget Time Period!
which of the following is true about pepsin? select one: a. most pepsin is released directly from chief cells b. pepsin is most active at high ph c. pepsin accelerate protein digestion d. pepsin accelerates fat digestion
The true statement about pepsin is: (d) pepsin accelerates fat digestion.
Pepsin is the digestive enzyme. It has the precursor called pepsinogen which is released from the chief cells. The site of action of the enzyme is the stomach that has an acidic environment. The pepsin enzyme is involved in the digestion of fats.
Digestion is the process of ingesting food in the form of large macromolecules into smaller soluble molecules. In this, the large carbohydrates, proteins and fats are broken down. For this a complete digestive system is present inside the body with several organs, enzymes and hormones involved.
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ellie may, a mother with type b blood, has a child with type o blood. she claims that jethro, who has type a blood, is the father. he claims that he cannot possibly be the father. further, blood tests ordered by maury povich reveal that the father is homozygous. judge joe brown rules that:
In addition, Maury povich's blood tests show that the father is homozygous. The Jerry Springer show should be called, according to judge Joe Brown, who agrees with Jethro.
What is often examined during a blood test?Blood tests are frequently performed. Find out how well-functioning organs like your kidneys, liver, heart, or thyroid are, as directed by healthcare professionals. aid in the diagnosis of illnesses like HIV/AIDS, diabetes, coronary heart disease, and cancer.
What activities are prohibited prior to a blood test?Avoiding certain meals and beverages, such as alcohol, grilled meats, and herbal tea. avoiding overindulging the day before a test. not a smoker. avoiding certain actions, such as engaging in sexual activity or hard exercise.
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What is the advantage of viewing a specimen at 40x as opposed to at 400x magnification?.
The benefit of viewing a specimen at 40x in preference to at 400x magnification is accelerated discipline of view and offer extra information about the specimen.
Specimen is described as a unmarried plant or animal this is investigated through professionals as an instance of a particular species or type.
It also can be described as a issue or character used to symbolize an entire mass or number; a feature plant, mineral, issue, animal, etc. a part of a chemical or fabric for checking out or research: a tissue sample; a urine sample. a particular or strange form of character.
Thus, the benefit of viewing a specimen at 40x in preference to at 400x magnification is accelerated discipline of view and offer extra information about the specimen.
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Variation and survival - Extended Task
Research and answer this question.
What are the advantages and disadvantages of variation to the survival of orangutans?
The advantages and disadvantages of genetic variation to the survival of orangutans are:
Advantages:
Because of variation, organisms can evolve to survive in challenging environments and become more resistant to diseases. It also fosters diversity.Disadvantages:
Negative effects, such as genetic disorders and diseases, are another potential drawbackWhat is genetic variation?
DNA sequence variations among members of a population are referred to as genetic variation. Sperm and egg cells, as well as somatic (all other) cells, are subject to variation.Three separate processes contribute to genetic diversity: gene recombination, gene migration, and mutation. Genetic variety and evolution are propelled by mutation. Base substitutions, deletions, and insertions are the different kinds of DNA mutations.Due to deforestation, illegal hunting, and forest fires that have decimated orang-utan wild populations, one of the most thorough genome analyses of orang gutans to date has revealed that its tiny populations are surprisingly genetically diverse. This raises the possibility that the critically endangered species could recover from its current dire situation.
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Which statement best describes reproduction with two parents?
A. Smaller yeast cells grow on the side of a larger yeast cell.
B. New African violet plants can grow from leaves cut off of existing
plants.
C. Many tadpoles hatch from a cluster of eggs fertilized by cells from
a male frog.
O
D. Small sea stars can grow from arms that break off of a large sea
star.
Which type of earths crust caused these layers to be higher in the background than they are in the foreground
A. Uplift
B. Vibration
C. Shearing
D. Compression
Answer:
the correct answer is objective A
as a teaching assistant, you must gather examples of deuterostomes from a large, unorganized selection of animals. which specimens should you select? (check all that apply.)
Echinoderms, ray-finned fishes, and tetrapod are the vertebrate groupings with the largest species diversity among the deuterostome lineages.
Specimens you should select :
1. Echinoderms (sea stars and sea urchins)
2. Hemichordates ("acorn worms that burrow in marine sands or mud)
3. Xenoturbellids
4. Chordata
These animals make up the Bilaterian, a collection of creatures with bilateral symmetry and three germ layers, together with Protostome and its outgroup Xenacoelomorphia.
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Which axis indirectly shows the relative amount of dna per cell? by what relationship?.
The x-axis indirectly shows the relative amount of DNA per cell. As the DNA was stained, there is a relationship between fluorescence and DNA content.
The x-axis does not show the relative amount of DNA per cell directly. It can be seen through a special type of graph known as a histogram. If we look at it, peaks and dips can be seen as similar to fluorescence.
This indirectly shows the relative amount of DNA per cell. This confirms the relationship between the fluorescence and the relative amount of DNA in the cell.
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Which functional region of the cerebellum is implicated in planning the sequence and timing of complex movements?.
The part of the brain involved in the sequence and timing of complex movements is the cerebrocerebellum.
The cerebellum is the largest part of the brain that initiates and coordinates movement and regulates temperature.
The brain is divided into 3 functional areas which are;
cerebrocerebellum spinocerebellum vestibulocerebellumcerebrocerebellum communicates with the cerebral cortex and is thought to be involved with planning and initiating movement it receives inputs from the cerebral cortex and pontine nuclei and sends inputs sends the outputs to the thalamus and red nucleus
spinocerebellum this part of the cerebellum is involved in regulating body movements by allowing for error correction
vestibulocerebellum gives signals which detect the head movement and send signals through the cerebellum to the head rotation and maintain a stable center of gaze.
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what is the most important negative effect of exposure to uv radiation in terms of reproductive success?
Exposure UV radiation have a high negative effect on reproductive success.
On live cells, ultraviolet light has several detrimental effects. A living cell exposed to UV light for an extended period of time frequently experiences changes in how the cell works as well as gene changes that result in cancer.
Sometimes, if it comes into touch with human skin, it usually results in rashes, ulcers, itching, burning, and redness.
What is reproductive success?
The number of offspring a person produces during a breeding event or lifetime is referred to as reproductive success. This is not constrained by the quantity of offspring one individual produces, but also by the ability of these offspring to reproduce.
What are UV radiations?
The sun and artificial sources, such tanning beds, both emit ultraviolet (UV) radiation, a type of non-ionizing radiation.
UV radiation overexposure can cause major health problems,
However, if it comes into touch with the skin for a long time and in high doses, skin cancer will result.
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the evolution of decreased virulence would be expected in a no, that's not the correct answer. a. horizontally transmitted parasite. b. parasite species in which multiple infection is frequent. c. host with an effective immune system. d. vertically transmitted parasite.
Evolution of decreased virulence would be expected in a no of vertically transmitted parasite.
Virulence is defined by the ability of a microorganism to cause disease in the host . Parasites get transmitted from a parent to its offspring at or before birth, this case is called vertical transmission of parasite.
When , parasites are transmitted by contact from an infected individual to an uninfected individual, in that case the transmission is said to be horizontal. For example ,vertically transmitted can be disease caused by virus or bacteria that is transferred from mother to child .
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retroviruses multiple choice produce protein directly from dna. only invade plants. contain dna. produce rna from dna. contain the enzyme reverse transcriptase.
Direct protein synthesis from DNA occurs in retroviruses. comprise DNA. from DNA, make RNA. simply plants invading. contain reverse transcriptase as an enzyme.
Why do you use the term "retrovirus"?(REH-troh-VY-rus) A category of virus whose genetic material is RNA rather than DNA. Reverse transcriptase is an enzyme that is used to integrate into the DNA of the host cells. This enables the virus to replicate often in the host cells.
What makes retroviruses unique?Because they multiply by reversibly encoding their genes into host cells, retroviruses are special. The most well-known retrovirus to infect people is HIV. Different species have been found to contract other retroviruses.
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a cricket has a diploid genome of 1.2 billion base pairs. assume that there are about 200,000 individuals in the population and that the mutation rate is one per 100 million base pairs. on average, how many new mutations will occur in an individual cricket?
New mutations will occur in 2,400,000 crickets.
Information given in the question:
There are 1.2 billion base pairs in the cricket's diploid genome.There are 200,000 people in the population.1 mutation per 100 million base pairs is the mutation rate.Therefore,
Number of mutations per individual = Total number of bases × Mutation rate= 1.2 billion × 1 per 100 million base pairs
= 1,200,000,000 × (1 ÷ 100,000,000 )
= 12 mutations per individual
Therefore,
Number of new mutations in the given population= Number of Mutations per Individual ×Total Number of Individuals
= 12 × 200,000
= 2,400,000
New mutations will occur in 2,400,000 crickets.
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which type of muscle would you expect to be guarding the opening between the stomach and the small intestine?
The muscle that guards the gap between the stomach and small intestine is known as a sphincter or circular muscle.
What is the function of smooth muscle?In the cardiovascular system, smooth muscle is utilized in vessels to control blood pressure and flow; in the lungs, it opens and closes airways; in the gastrointestinal system, it contributes to motility and nutrition absorption; and yet it still has functions in nearly every other organ system.
Your digestive tract is made up of what kind of muscle?The uterus, the digestive tract, and blood veins like arteries are just a few of the interior tissues that contain smooth muscle. Wave-like contractions occur down the length of the structure's smooth muscle, which is structured in stacked sheets.
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process of assembeling a protein on the basis of the information in an rna molecule
Answer:
translation.
Explanation:
translation assembles amino acids to form the polypeptide chain in ribosomes.
Concept of artificial ecosystems
Hello..!
They are created with the intervention of the human being and can be modified at any time
Example:
Urban ecosystems; The gardensAgricultural ecosystems; the orchardsIs movement of carbon from living organisms to the atmosphere decreased
No, Carbon dioxide is increasing, as the combustion of fossil fuels for energy has led to an increase in the amount of carbon dioxide in the earth’s atmosphere.
What are fossil fuels?The components of fossil fuels are decaying plants and animals. These fuels may be burned to provide energy and can be found in the crust of the Earth. An example of a fossil fuel is coal, as well as oil and natural gas. Coal is a substance that is typically found in sedimentary rock formations, which are collections of rock, dead plant and animal materials, and layers of silt.
A chunk of coal must contain more than 50% fossilized plant material. Shale is one sedimentary rock type that contains oil in its native form. The thick oil that can be used to make gasoline is created by heating this substance. Typically, pockets of natural gas can be found atop oil deposits.
Gasoline has the chemical formula C8H18. It appears like this when you combine it with oxygen, or when you burn it: 2(C8H18) + 25(O2) = 16(CO2) + 18 (H2O). That’s a significant amount of CO2.
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what are the similarities and differences you observe between the anatomy of the sheep brain and the anatomy of the human brain? what structures were you able to visualize over the course of the dissection?
Similarities and differences between sheep and Human brain:
Similarities:
The sheep brain is similar to the human brain in having two brain stems, two optic nerves and two hemispheres.
Differences:
Compared to a sheep's brain, the human brain is larger and heavier. In comparison to the human brain, the olfactory bulb is more developed in the sheep's brain. The shape of the sheep's brain is elongated, whereas the human brain is spherical. The frontal lobe of the human brain is bigger than that of the sheep's brain. The main distinction between the human and sheep brains is that humans can use their brains to think, innovate, but sheep cannot.
Over the course of dissection structures visualizes include; cerebrum, cerebellum, brain stem, Hypothalamus, Pituitary gland, Pineal gland, Thalamus etc.
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homoserine is: a) a precursor of both methionine and threonine. b) a precursor of serine. c) derived from homocysteine. d) derived from serine. e) derived from threonine
Homoserine is considered to be a precursor of both methionine and threonine.
So, the correct option is A.
Homoserine, or its lactone form, is produced when cyanogen bromide cleaves a peptide caused by methionine breakdown. Methionine, threonine, an isomer of homoserine, and isoleucine are the three necessary amino acids that are produced during the production of homoserine. Homoserine, a precursor of threonine and methionine, inhibits the activity of glutamate dehydrogenase, an enzyme that catalyzes the first process in the absorption of ammonia. This impact is supported by physiological and biochemical data.
Methionine, threonine, an isomer of homoserine, and isoleucine are the three necessary amino acids that are produced during the production of homoserine. Glycolysis, tricarboxylic acid (TCA), and the citric acid cycle are all components of the whole metabolic route.
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sea urchins are deuterostomes, which exhibit indeterminate cleavage in their development. if during growth of the embryo, one cell were to separate from the rest of the embryo, what would be it's fate?
Since sea urchins being deuterostomes, possess indeterminate cleavage, the separation of one cell from rest of the embryo will result in its growth into genetically identical embryo.
Deuterostomes are those species in which the formation of anus occurs before the formation of their mouth. The anus is formed from the blastopore in them. Deuterostome literally means second mouth. Example of such animals is: starfish, sea urchin, sea lily, sea cucumber, etc.
Indeterminate cleavage is the one where the cells of embryo possess the ability to give rise to complete embryo is they are separated from the actual embryo. Therefore, the cells are said to be totipotent.
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what results if a fragment of a chromosome breaks off and then reattaches to the original chromosome at the same place, but in the reverse direction? view available hint(s)for part a what results if a fragment of a chromosome breaks off and then reattaches to the original chromosome at the same place, but in the reverse direction? a deletion a nondisjunction an inversion a translocation polyploidy
Inversion results if a fragment of a chromosome breaks off and then reattaches to the original chromosome at the same place, but in the reverse direction.
So, the correct option is C.
An inverted DNA sequence is one that has been broken off from a chromosome, reversed against the native genetic sequence that was previously present in the genome, and then reattached. It leads to the chromosomal anomaly known as inversion. A chromosome breaks in two places and the resultant piece of DNA is reversed and reinserted into the chromosome. This is known as an inversion. The chromosomal breaks might result in the loss or gain of genetic material.
A chromosomal inversion is a rearrangement in which one end of a chromosome is flipped from the other. When a single chromosome breaks and rearranges itself, it results in an inversion. Paracentric and pericentric inversions are the two sorts.
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when people have a bacterial infection, pyrogens are often released to maintain elevated body temperature, which helps kill the bacteria causing the infection. which answer option is the most likely action of pyrogens on thermoregulation?
The most likely action of pyrogens on thermoregulation is that these substances will reset the set point of the sensors and cause the death of the bacteria.
Endogenous pyrogens are substances that are released into the blood when phagocytic leukocytes kill a bacterium. The hypothalamus receives these pyrogens and the thermostat (sensors) is reset. This enables the condition known as a fever, in which the body's temperature rises. A nutrient required by bacteria is reduced as a result of iron becoming more conserved when body temperature rises.
The pathogen may also be killed by heat itself. The hypothalamus regulates body temperature through reflexes that result in sweating and vasodilation when the body is too warm or shivering and vasoconstriction when the body is too cold. It responds to bodily substances.
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BRAINLIESTTT ASAP!!!
-recognize the names and relative ages of extinct hominids ( EXPLAIN THEM )
The group made up of all of our close relatives as well as extinct entire human race and current humans.
Which came first, hominids or hominins?Modern humans as well as all our extinct relatives on our own branching of the phylogenetic ladder are now referred to as hominins instead of hominids, as they were in previous classifications.
Exist hominins today?The hominins, a term used to describe a broad group of extinct humans and apes with human features, are now exclusively recognized as Homo sapiens. Around 20 species are included in this category, and there are likely many more that are still undiscovered. You might also be interested in: Human proximity changes animals.
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grapefruit juice inhibits the cytochrome p450 cyp3a4 drug-metabolizing enzyme and inhibits p-glycoprotein in the intestines for days after ingestion. the nurse will teach patients that are taking a drug impacted by grapefruit juice that it can cause which problem?
When some medications are taken by a person who also consumes grapefruit juice, the drug concentration and risk of adverse effects may both increase.
The harmful substance in grapefruit does not directly interact with your medication. Instead, it binds to the CYP3A4 enzyme, which lessens the absorption of several drugs, in the digestive system. When grapefruit juice inhibits the enzyme, it is simpler for the medication to enter your bloodstream from your gut. Blood levels will rise more quickly and significantly above normal levels, and in some circumstances, these dangerously high levels may occur.
Examples of drugs that are affected by grapefruit juice are : Statins. Calcium channel blockers, anticoagulants, antiplatelet medications, cylosporin and immunosuppressants, Entocort, and cytotoxic medications are all examples of statins, which are medications that decrease cholesterol.
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which brain structure maintains homeostasis and influences blood pressure, heart rate, digestive activity, breathing rate, and other important physiological functions in the body?
The hypothalamus regulates homeostasis and affects body temperature, blood pressure, heart rate, digestive activity, and breathing rate.
A section of the forebrain located beneath the thalamus. The central nervous system's control and coordination are the hypothalamus' primary responsibilities. The hypothalamus aids in maintaining homeostasis, or body balance.
The major hormones secreted from the hypothalamus include thyrotropin-releasing hormone (TRH) and gonadotropin-releasing hormone (GnRH). The brain's deep structures serve as the body's intelligent control and coordination hub. Its major job is to maintain homeostasis, a constant state of equilibrium in your body. It carries out its function through controlling hormones or by directly affecting your autonomic nervous system.
Thus, the hypothalamus regulates homeostasis, blood pressure, heart rate, digestive activity, breathing rate, and body temperature.
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Which type of mutation causes cystic fibrosis?
Answer: cystic fibrosis transmembrane conductance regulator (CFTR) gene.
Explanation:
Hello!
The type of mutation which causes cystic fibrosis is a mutation in the CFTR gene. (Cystic Fibrosis Transmembrane Conductance Regulator)
Hope this helps!