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PORTAGE LEARNING A&P II:
FINAL EXAM | QUESTIONS AND
CORRECT ANSWER S | LATEST
UPDATE | GRADED A+
Question : This is a collection of cell bodies found in the
peripheral nervous system.
CORRECT ANSWER : Ganglia
Question : This part of the autonomic system increases
digestion.
CORRECT ANSWER : Parasympathetic
Question : The ventral root of a nerve contains what type
of neurons?
CORRECT ANSWER : Motor (Efferent)
Question : This part of a neuron conducts nerve impulses
away from the cell body.
CORRECT ANSWER : Axon
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Question : An interneuron inside the spinal cord is part of
the:
CORRECT ANSWER : Central nervous system
Question : Describe the synthesis and storage of
neurotransmitters.
CORRECT ANSWER : The neuron cell body
manufactures neurotransmitters, which are stored in secretory vesicles at the end of axon terminals.
Question : An afferent neuron carries information:
CORRECT ANSWER : From the peripheral to the
central nervous system
Question : What is the location and function of
Astrocytes?
CORRECT ANSWER : Astrocytes form the blood/brain
barrier, are found in the brain, and are part of the CNS
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Question : A patient's left thumb was severed in a cooking
accident and then reattached during surgery. Would the patient be expected to regrow axons in their thumb? Why or why not?
CORRECT ANSWER : Yes; Peripheral nerves can
regenerate the length of the axon through axonal regeneration because of the growth of Schwann cells ahead of the axon.
Question : Name and describe what is occurring in the
neuron cell membrane in section 2 of the diagram.Include the charge of the membrane during this phase.CORRECT ANSWER : Depolarization: The sodium gates open and sodium rushes into the axon during the depolarization phase of the action potential.Voltage travels past zero and then on up to +40 mV.
Question : At rest, a neuron plasma membrane is:
CORRECT ANSWER : -70mV
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Question : Which of the following is false concerning the
sodium-potassium pump?
CORRECT ANSWER : The overall effect is a negative
charge on the outside of the membrane.
Question : True or false: A sensory neuron is signaling the body of a light touch. This means that the strength of the action potential is weaker than usual. Explain your reasoning.
CORRECT ANSWER : False. The action potential is
always the same. The frequency and number of nuerons activated change the increase in intensity.
Question : Which of the following statements is false
concerning the neuromuscular junction?
CORRECT ANSWER : Ach is released from the
presynaptic motor neuron to cause an action potential in the muscle fiber.
Question : How is a message sent from one neuron to
another?