3. Damage to the ventral root causes the flaccid paralysis of the muscle served and muscle begins to atrophy. Why?
Even at the stage of complete rest , a healthy muscle has a bit of tension in it. Due to this it doesn't feel feel flabby but resilient. The result of a lightly maintained flow of an asynchronous low frequency impulses from spinal cord, will be the palpable muscle firmness. The spinal cord help in generating a small contraction of a smaller skeletal muscle fibers along with a random degree of active tension.
The basic muscle tone is lost immediately when a the functioning
of the ventral roots is impaired. This also happens in cases when
the dorsal roots which have sensory fibers from the muscles get
damaged. Hence, the tone must and always should be
considered the property of reflex activity rather than the muscle
itself.
The result of weakness from disuse in some muscle atrophy happens
in any lesion. The losing of innervation to the muscles results in
Fasciculations and the atrophy is a pronounced
occurrence in many LMN lesions. These signify a complete damage in
any of the axons or in the anterior horn cells.
3. Damage to the ventral root causes the flaccid paralysis of the muscle served and muscle...
Damage to the corticospinal tract results in: muscle paralysis on the opposite side of motor cortex if damage occurs at the level of the brain muscle paralysis on the opposite side of the spinal cord if damage occurs at the level of the spinal cord loss of touch sensation on the opposite side of motor cortex if damage occurs at the level of the brain
Question 8 Damage to the ventral root would have which of the following effects? O Sensory information would not be able to reach the interneuron Motor information would not be able to reach the effector O Both motor information and sensory information would be prevented from being transmitted The interneuron would not be able to transfer information down its axon
12. There is a polar (hydrophilic) solvent contaminant in tap water. This chemical causes damage to the kidney. It is biotransformed to a less toxic molecule by enzymes in the liver.« How might an individual be exposed to this chemical? (3 points) Which route(s) of exposure would concern you most and why? (2 points)
Canavan disease is an autosomal recessive disease that causes progressive damage to nerve cells in the brain. Symptoms such as mental retardation, loss of motor skills and abnormal muscle tone progress rapidly beginning in infancy. The disease is fatal with no cure, and death usually occurs before age 4. This disease is caused by mutations in the gene for aspartoacylase on chromosome 17. In the Ashkenazi Jewish population, 1 in 10,000 persons are born with the disease. Assuming that this...
The term teratogen refers to any environmental agent that causes damage during the prenatal period. 1. Why is it difficult to determine the effects of prenatal exposure to some environmental agents, such as drugs, diseases, and pollution? 2. Can genes influence the extent to which the developing organism is affected by teratotogens? 3. Generate a list of factors that might contribute to a developing babys susceptibility to the effects of teratogens.
Need help with both questions, thank you!
Question 3 In muscle, low energy charge causes glycogen phosphorylaseb to become dephosphorylated. switch from T to R state. switch from R to T state. become phosphorylated. switch to glycogen phosphorylase a. Question 4 Which of the following acts as a primer for glycogen synthesis? glycogenin glucosidase glucagon glycogen primase gluconeogenesis
Please answer each question, help.
7. The ventral root of a spinal nerve contains A. only sensory fibers В.only motor fibers. C. only afferent fibers D. both E. a ganglion sensory and motor fibers s. During a spinal tap, cerebrospinal fuid is obtained from which of the following locations? . A. dural sinus B. epidural space C. D. subdural space space E. sagittal sinus 9. The lumbosscral plexus supplies A, the diaphragm B. intercostal muscles C. muscles of the arm...
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of to as to of In Panel A the muscle is passively beched by adding a load at the arrow marked "PULL". Why does the latest Sher from the degan increase its action potential discharge when the food is added stimulating ONLY the mo o n and the caused the muscle to short What causes the latteren for decrease discharge when t he motoneuronne mulated? c. In Panel of the arrow labeled on the muscles are contracted by simulating...
2. You've identified a mutant allele for a new gene in mice that causes muscle hypertrophy You've named the gene Mh, so the wild-type allele is Mh, while the big-muscle mutant allele you've designated as Mh89, You believe this gene is involved in muscle growth and development, but you haven't been able to isolate the protein yet. You also do not know exactly where the mutation is in the gene, but you do know that the mRNA transcript of the...
Who is at highest risk for liver disease? What is the portal circulation? How/Why does portal hypertension occur? What role do the collateral vessels play in portal hypertension? Elevations of which 2 LFT are indicative of generalized liver inflammation? Which of these 2 tests is specific to the liver? Why does the albumin level help assess liver function? Why is PT (prothrombin time) a liver function test? Why might the GTT be elevated? What 2 diseases might the alkaline phosphatase...