Anatomy and Physiology A&P Module 1 Exam (GRADED A) Questions and Answers elaborations

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Module 1 Exam- Requires Respondus LockDown Browser Due No due date Points 100 Questions 28 Time Limit 60 Minutes ... Correct! Bipolar It has two extensions from the central cell body. Multipolar Unipolar Pseudounipolar Question 8 Not yet graded / 4 pts Describe the function and release of neurotransmitters. Your Answer: Neurotransmitters are chemicals that are stored in the axon terminal vesicles. When neurotransmitters are released they carry the nerve impulse to one neuron to the next. Neurotransmitters are chemicals stored inside secretory vesicles (axon terminal vesicles) at the end of the axon terminals. When neurotransmitters are released by the axon terminal vesicles, they carry the transmission of the nerve impulse from one neuron to another. Answer the following essay questions: Your doctor taps on your patellar tendon. List out the steps, in detail, of the nervous pathway of the reflex he is testing. Include any sensory organs involved and the action of the reflex. Your Answer: The sensory neuron detects the tap on the patellar tendon, then sends signal through the ganglion in the dorsal root to the spinal cord. Then the sensory neruon synapses in the gray matter of the spinal cord onto a motor neuron in the anterior horn. The motor neuron sends signal through the ventral root and synapses back on the patellar tendon. Question 28 Not yet graded / 10 pts Answer the following essay questions: Multiple Sclerosis is an autoimmune disease which attacks the myelin sheath of the nerve axon. Patients with this disease may experience difficulty using the muscles of their arms and legs. Explain why this would occur. Your Answer: The myelin sheath insulates the nerve fiber around the axon which increses the speed of nerve impulses. Patients with multiple sclerosis would experience difficulty using their muscles because the nerve impulse transmission would struggle to jump the gaps in the myelin sheath. Myelin increases nerve conduction speed and protects the nerve. If the myelin is damaged, the conduction speed would be slower than normal, and the nerve axon itself would be vulnerable to permanent damage without the myelin present for protection. Quiz Score: 34 out of 100 [Show More]

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