Portage Learning Anatomy & Physiology
2: Module 1 Exam
This is a bundle of axons found in the peripheral nervous system.
⁕- nerve
This part of the
... [Show More] autonomic system accelerates the heart beat and increases breathing
rate. ⁕- sympathetic nervous system
The ventral root of a nerve contains what type of neurons?
⁕- motor (efferent)
This part of a neuron conducts nerve impulses towards the cell body.
⁕- denderites
A neuron going to the bicep of the forearm is part of the:
⁕- A. Central nervous system
B. Peripheral nervous system
C. Autonomic system
D. Somatic system
E. A&C
Correct! F. B&D
The neuron pictured, below, is best described as:
⁕- A) Bipolar
B) Correct! Multipolar
C) Unipolar
D) Pseudounipolar
True or false: Neurons do not physically touch one another.
⁕- True
Neurons do not physically touch. They are separated by synapses.
Describe the synthesis and storage of neurotransmitters.
⁕- The neuron cell body manufactures neurotransmitters, which are stored in secretory
vesicles at the end of axon terminals.
An afferent neuron carries information:
⁕- A) From the central to the peripheral nervous system
B) Correct Answer From the peripheral to the central nervous system
C) Within the central nervous system
D) Within the peripheral nervous system
A presynaptic neuron would be found:
⁕- A) Correct Answer Before the synapse
B) After the synapse
C) Inside the synapse
D) Only in the peripheral nervous system
What is the location and function of Satellite cells?
⁕- 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?
⁕- No; Only peripheral system axons are capable of regeneration. The spinal cord is in
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.
⁕- Afterpolarization (Hyperpolarization) Potassium gates are slow to close and there is
an undershoot of the potential.
The charge drops below -70mV and then returns to -70mV once at resting state again.
At rest, a neuron plasma membrane is:
⁕- A) 0 mV
B) +40 mV
C) Correct! Polarized (around -70mV)
D) Depolarized
Which of the following is false concerning the sodium-potassium pump?
⁕- A) It maintains the resting phase of an axon.
B) For every three sodium ions pumped out, two potassium ions are pumped in.
C) It must remain in constant operation to maintain the resting state.
D) Correct Answer The overall effect is a negative charge on the outside of the
membrane.
(False, the effect of the pump is a negative charge inside the membrane, positive on the
outside.)
True or false: A sensory neuron is signaling the body of extreme pain. This means that
the strength of the action potential is greater than usual. Explain your reasoning.
⁕- False
There is no variation in the strength of action potentials. (It is an all-or-nothing
response). There is variation in the number and frequency of neurons firing.
Which of the following statements is true concerning the neuromuscular junction?
⁕- A) The NMJ terminates on neurons within the brain and spinal cord.
B) Correct! The NMJ terminates on a muscle fiber.
C) The NMJ terminates on a presynaptic motor neuron.
D) The NMJ does not have a synapse.
How is a messag [Show Less]