Portage Learning A&P 2 Final Exam And
Updated
Verified Answers 2027.
This is a collection of cell bodies found in the peripheral nervous
system.
Ganglia
This part of the autonomic system increases digestion.
Parasympathetic
The dorsal root of a nerve contains what type of neurons?
Sensory (Afferent)
This part of a neuron conducts nerve impulses towards the cell body.
Dendrites
An interneuron inside the spinal cord is part of the:
D. Central nervous system
The neuron pictured, below, is best described as:
Multipolar
True or false: Neurons do not physically touch one another.
True
,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:
From the peripheral to the central nervous system
A postsynaptic neuron would be found:
After the synapse
What is the location and function of Astrocytes?
Location: Central nervous system (CNS)
Function: Regulation of chemical environment inside CNS, forming a
physical barrier (blood-brain-barrier) by wrapping around blood
capillaries
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?
Yes; Peripheral nerves can regenerate the length of the axon through
axonal regeneration because of the growth of Schwann cells ahead of
the axon.
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:
-70 mV
Which of the following is true concerning the sodium-potassium
pump?
It must remain in constant operation to maintain the resting state.
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.
False
Which of the following statements is true concerning the
neuromuscular junction?
The NMJ terminates on a muscle fiber.
What prevents continuous stimulation of a nerve synapse and how is
this accomplished?
The short existence of neurotransmitters in the synapse prevents
continuous stimulation. Some synapses contain enzymes that rapidly
inactivate neurotransmitters and other synapses rapidly absorb the
neurotransmitter.
What neurotransmitter is found at the neuromuscular junctions?
Acetylcholine (ACh)
True or False: Action potentials travel in one direction within the same
neuron.
, True
True or False: Reflexes occur slower than a conscious decision to move
from the brain.
False
Fill in the blank: In a reflex, the ____________ neuron conducts nerve
impulses along a pathway to create a response.
motor (efferent)
Where is the integration center of a reflex located?
CNS (central nervous system)
Which of the following statements is false about reflexes?
Pulling a hand away from a hot flame is not a reflex; it is entirely
voluntary.
What is true about the stretch reflex?
The muscle spindle detects stretch within the muscle.
What is true about the flexor withdrawal reflex?
A. It does not involve interneurons.
B. It involves excitatory interneurons.
C. It involves inhibitory interneurons.
D. The effect of the reflex is to create a co-contraction of two muscles
E. A&D
Correct! F. B&C
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.
Updated
Verified Answers 2027.
This is a collection of cell bodies found in the peripheral nervous
system.
Ganglia
This part of the autonomic system increases digestion.
Parasympathetic
The dorsal root of a nerve contains what type of neurons?
Sensory (Afferent)
This part of a neuron conducts nerve impulses towards the cell body.
Dendrites
An interneuron inside the spinal cord is part of the:
D. Central nervous system
The neuron pictured, below, is best described as:
Multipolar
True or false: Neurons do not physically touch one another.
True
,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:
From the peripheral to the central nervous system
A postsynaptic neuron would be found:
After the synapse
What is the location and function of Astrocytes?
Location: Central nervous system (CNS)
Function: Regulation of chemical environment inside CNS, forming a
physical barrier (blood-brain-barrier) by wrapping around blood
capillaries
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?
Yes; Peripheral nerves can regenerate the length of the axon through
axonal regeneration because of the growth of Schwann cells ahead of
the axon.
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:
-70 mV
Which of the following is true concerning the sodium-potassium
pump?
It must remain in constant operation to maintain the resting state.
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.
False
Which of the following statements is true concerning the
neuromuscular junction?
The NMJ terminates on a muscle fiber.
What prevents continuous stimulation of a nerve synapse and how is
this accomplished?
The short existence of neurotransmitters in the synapse prevents
continuous stimulation. Some synapses contain enzymes that rapidly
inactivate neurotransmitters and other synapses rapidly absorb the
neurotransmitter.
What neurotransmitter is found at the neuromuscular junctions?
Acetylcholine (ACh)
True or False: Action potentials travel in one direction within the same
neuron.
, True
True or False: Reflexes occur slower than a conscious decision to move
from the brain.
False
Fill in the blank: In a reflex, the ____________ neuron conducts nerve
impulses along a pathway to create a response.
motor (efferent)
Where is the integration center of a reflex located?
CNS (central nervous system)
Which of the following statements is false about reflexes?
Pulling a hand away from a hot flame is not a reflex; it is entirely
voluntary.
What is true about the stretch reflex?
The muscle spindle detects stretch within the muscle.
What is true about the flexor withdrawal reflex?
A. It does not involve interneurons.
B. It involves excitatory interneurons.
C. It involves inhibitory interneurons.
D. The effect of the reflex is to create a co-contraction of two muscles
E. A&D
Correct! F. B&C
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.
