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2025 BIOD 152 FINAL EXAM (ACTUAL EXAM) | ALL
QUESTIONS AND CORRECT ANSWERS | GRADED A+ |
LATEST EXAM | VERIFIED ANSWERS
This is a bundle of axons found in the peripheral nervous system. -
..(ANSWER)...nerves
This part of the autonomic system increases digestion -
..(ANSWER)...parasympathetic nervous system
The ventral root of a nerve contains what type of neurons - ..(ANSWER)...Motor
(efferent)
This part of a neuron conducts nerve impulses toward the cell body -
..(ANSWER)...Dendrites
A neuron going to the bicep of the forearm is part of the:
A. CNS
B. PNS
C. Autonomic system
D. Somatic
E. A and C
D. B and D - ..(ANSWER)...B and D
, 2
True or False: Neurons do not physically touch each other - ..(ANSWER)...True.
They are seperated by synapses
Describe the function and release of neurotransmitters - ..(ANSWER)...-
Neurotransmitters are chemicals stored inside secretory 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
An efferent neuron carres information:
A From the CNS to the PNS
B. From the PNS to the CNS
C Within the CNS
D Within the PNS - ..(ANSWER)...A From the CNS to the PNS
A presynaptic neuron would be found:
A before the synapse
B. after the synapse
C. Inside the synapse
D. Only in the PNS - ..(ANSWER)...A Before the synapse
What is the location and function of astrocytes - ..(ANSWER)...Location: Central
nervous system (CNS)
, 3
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 - ..(ANSWER)...Yes. Peripheral nerves can regenerate the length of
the axon through the axonal regeneration because of the growth of schwann cells
ahead of the axon.
At rest, a neuron plasma membrane is
A 0 mV
B +40 mV
C Polarized
D Depolarized - ..(ANSWER)...C polarized (around -70 mV)
Which of the following is true concerning the sodium-potassium pump?
A. It maintains the depolarization phase of an axon
B. For every two sodium ions pumped out, three potassium ions are pumped in
C. It must remain in constant operation to maintain the resting state
D. The overall effect is a positive charge on the inside - ..(ANSWER)...C. It must
remain in constant operation to maintain the resting rate
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
, 4
answer. - ..(ANSWER)...False. There is no variation in the strength of an action
potential. There is only 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 The NMJ terminates on a muscle fiber
C The NMJ terminates on a presynaptic motor
D The NMJ does not have a synapse - ..(ANSWER)...B The NMJ terminates on a
muscle fiber
How is a message sent from one neuron to another - ..(ANSWER)...There is a
minute fluid-filled space, called a synapse, between the axon terminal of the
sending neuron and the dendrite of the receiving neuron. When a nerve impulse
reaches the end of an axon, neurotransmitters are released into the synapse.
These bind with a receptor on the next neuron, opening Na+ gates in the
receiving dendrite which causes depolarization and the impulse is carried.
What neurotransmitter is found at the neuromuscular junctions -
..(ANSWER)...Acetylcholine ACh
True or False: Action potentials travel in multiple directions within the same
neuron - ..(ANSWER)...False: only one direction in the same neuron
True or false: reflexes occur only with conscious intervention from the brain -
..(ANSWER)...False
2025 BIOD 152 FINAL EXAM (ACTUAL EXAM) | ALL
QUESTIONS AND CORRECT ANSWERS | GRADED A+ |
LATEST EXAM | VERIFIED ANSWERS
This is a bundle of axons found in the peripheral nervous system. -
..(ANSWER)...nerves
This part of the autonomic system increases digestion -
..(ANSWER)...parasympathetic nervous system
The ventral root of a nerve contains what type of neurons - ..(ANSWER)...Motor
(efferent)
This part of a neuron conducts nerve impulses toward the cell body -
..(ANSWER)...Dendrites
A neuron going to the bicep of the forearm is part of the:
A. CNS
B. PNS
C. Autonomic system
D. Somatic
E. A and C
D. B and D - ..(ANSWER)...B and D
, 2
True or False: Neurons do not physically touch each other - ..(ANSWER)...True.
They are seperated by synapses
Describe the function and release of neurotransmitters - ..(ANSWER)...-
Neurotransmitters are chemicals stored inside secretory 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
An efferent neuron carres information:
A From the CNS to the PNS
B. From the PNS to the CNS
C Within the CNS
D Within the PNS - ..(ANSWER)...A From the CNS to the PNS
A presynaptic neuron would be found:
A before the synapse
B. after the synapse
C. Inside the synapse
D. Only in the PNS - ..(ANSWER)...A Before the synapse
What is the location and function of astrocytes - ..(ANSWER)...Location: Central
nervous system (CNS)
, 3
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 - ..(ANSWER)...Yes. Peripheral nerves can regenerate the length of
the axon through the axonal regeneration because of the growth of schwann cells
ahead of the axon.
At rest, a neuron plasma membrane is
A 0 mV
B +40 mV
C Polarized
D Depolarized - ..(ANSWER)...C polarized (around -70 mV)
Which of the following is true concerning the sodium-potassium pump?
A. It maintains the depolarization phase of an axon
B. For every two sodium ions pumped out, three potassium ions are pumped in
C. It must remain in constant operation to maintain the resting state
D. The overall effect is a positive charge on the inside - ..(ANSWER)...C. It must
remain in constant operation to maintain the resting rate
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
, 4
answer. - ..(ANSWER)...False. There is no variation in the strength of an action
potential. There is only 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 The NMJ terminates on a muscle fiber
C The NMJ terminates on a presynaptic motor
D The NMJ does not have a synapse - ..(ANSWER)...B The NMJ terminates on a
muscle fiber
How is a message sent from one neuron to another - ..(ANSWER)...There is a
minute fluid-filled space, called a synapse, between the axon terminal of the
sending neuron and the dendrite of the receiving neuron. When a nerve impulse
reaches the end of an axon, neurotransmitters are released into the synapse.
These bind with a receptor on the next neuron, opening Na+ gates in the
receiving dendrite which causes depolarization and the impulse is carried.
What neurotransmitter is found at the neuromuscular junctions -
..(ANSWER)...Acetylcholine ACh
True or False: Action potentials travel in multiple directions within the same
neuron - ..(ANSWER)...False: only one direction in the same neuron
True or false: reflexes occur only with conscious intervention from the brain -
..(ANSWER)...False
