BIOD 152 Final Exam
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BIOD 152 Final Exam
- This is a bundle of axons found in the peripheral nervous system.
Answer: Nerve
- This part of the autonomic system increases digestion.
Answer: Parasympathetic
- The dorsal root of a nerve contains what type of neurons?
Answer: Sensory (afferent)
- This part of a neuron conducts nerve impulses away from the cell body.
Answer: -Axon
5. A neuron going to the bicep of the forearm is part of the:
- central nervous system
- peripheral nervous system
- Autonomic system
- Somatic system
- A&C
- B&D
Answer: F. B&D
6. The neuron pictured, below, is best described as:
- Bipolar
- Multipolar
- Unipolar
- Pseudounipolar
Answer: B. Multipolar
7. True or false: Neurons do not physically touch one another.
Answer: True
- Describe the synthesis and storage of neurotransmitters.
Answer: The neuron cell body manufactures neurotransmitters, which are stored in secretory vesicles at the end of axon terminals
9. An efferent neuron carries information:
- From the central to the peripheral nervous system
- From the peripheral to the central nervous system 2 / 3
- Within the central nervous system
- Within the peripheral nervous system
Answer: A. From the central to the peripheral nervous system
10. A postsynaptic neuron would be found:
- before the synapse
- after the synapse
- inside the synapse
- Only in the central nervous system
Answer: B. after the synapse
- What is the location and function of Satellite cells?
Answer:
Location: peripheral nervous system (PNS)
Function: Regulation of environment of neuron cell bodies
- A patient's spinal cord was severed in a car accident. Would the patient be expected to
regrow axons in their spinal cord? Why or why not?Answer: No, only the peripheral system axons are capable of regeneration. The spinal cord is the central nervous system
- Name and describe what is occurring in the neuron cell membrane in section 4 of the
diagram. Include the charge of the membrane during this phase.Answer: This is phase 4: afterpolarization (hyperpolarization), the potassium gates are slow to clse and that results in an undershoot of the potential, the voltage will drop below -70mV and the return to the restign state beings.
14. At rest, a neuron plasma membrane is:
- -70 mV
- +40 mV
- Hyperpolarized
- Depolarized
Answer: A. -70 mV
- Which of the following is false concerning the sodium-potassium pump?
- it maintains the resting phase of an axon
- For every three sodium ions pumped out, two potassium ions are pumped in
- it must remain in constant operation to maintain the resting state
- The overall effect is a negative charge on the outside of the membrane
Answer: D. The overall effect is a negative charge on the outside of the membrane
- True or false: A sensory neuron is signaling the body of extreme pain. This means that the
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strength of the action potential is greater than usual. Explain your reasoning