BIO 203
Bio 203 Final Exam Review Study
Questions and Answers 2025
Nerves are __________ of the nervous system.
A. organs
B. tissues
C. organ systems
D. organelles
E. cells -Correct Answer ✔a. organs
The term "nerve fiber" refers to a(n) __________.
A. nerve cell
B. organelle in nerve cells
C. organ
D. axon
E. bundle of macromolecules in nerve cells -Correct Answer ✔d. axon
What is the primary site on a neuron for receiving signals from other neurons?
a. the axon terminals
b. the axons
c. the axon collaterals
d. the neurosomas
e. the dendrites -Correct Answer ✔e. the dendrites
In order to regenerate, a peripheral nerve fiber must have which of the following?
a. all dendrites intact
b. at least half of the length of the fiber intact
c. at least the entire axon and neurilemma intact
d. the neurosoma and at least some of neurilemma intact
BIO 203
,BIO 203
e. at least part of the neurosoma intact -Correct Answer ✔d. the neurosoma and at
least some of the neurilemma intact
Which of the following will cause the plasma membrane to hyperpolarize when at
its RMP?
a. an inflow of sodium
b. an inflow of potassium
c. an inflow of calcium
d. an inflow of chloride
e. an outflow of chloride -Correct Answer ✔d. an inflow of chloride
A neuron receives a stimulus. Which of the following events happens next?
a. a local potential develops
b. threshold is reached
c. hyperpolarization of the membrane
d. repolarization of the membrane
e. a resting membrane potential is established -Correct Answer ✔a. a local
potential develops
When the voltage of a plasma membrane shifts from +35 mV toward 0 mV, the
cell is __________.
a. depolarization
b. repolarization
c. hyperpolarization
d. reaching the threshold
e. exiting the threshold -Correct Answer ✔b. repolarization
All of the following are typical characteristics of neurotransmitters except
__________.
a. they are synthesized by a presynaptic neuron
BIO 203
, BIO 203
b. they are released in response to stimulation
c. they are released into the bloodstream before reaching the postsynaptic cell
d. they bind to specific receptors on the postsynaptic cell
e. they alter the physiology of the postsynaptic cell -Correct Answer ✔c. they are
released into the bloodstream before reaching the postsynaptic cell
Inhibitory postsynaptic potentials (IPSPs) are associated with which of the
following?
a. depolarization of the cell membrane
b. repolarization of the cell membrane
c. hyperpolarization of the cell membrane
d. no change in the cell membrane potential
e. no change of the threshold -Correct Answer ✔c. hyperpolarization of the cell
membrane
Which of these is an example of an EPSP in a typical neuron?
a. a voltage change from 0 mV to +0.35 mV
b. a voltage change from -70 mV to -69.5 mV
c. a voltage change from -69.5 mV to -70 mV
d. a voltage change from +35 mV to 0 mV
e. a voltage change from -70 mV to -70.5 mV -Correct Answer ✔b. a voltage
change from -70 mV to -69.5 mV
What is the opposite of presynaptic inhibition?
a. coding
b. integration
c. recruitment
d. summation
e. facilitation -Correct Answer ✔e. facilitation
BIO 203
Bio 203 Final Exam Review Study
Questions and Answers 2025
Nerves are __________ of the nervous system.
A. organs
B. tissues
C. organ systems
D. organelles
E. cells -Correct Answer ✔a. organs
The term "nerve fiber" refers to a(n) __________.
A. nerve cell
B. organelle in nerve cells
C. organ
D. axon
E. bundle of macromolecules in nerve cells -Correct Answer ✔d. axon
What is the primary site on a neuron for receiving signals from other neurons?
a. the axon terminals
b. the axons
c. the axon collaterals
d. the neurosomas
e. the dendrites -Correct Answer ✔e. the dendrites
In order to regenerate, a peripheral nerve fiber must have which of the following?
a. all dendrites intact
b. at least half of the length of the fiber intact
c. at least the entire axon and neurilemma intact
d. the neurosoma and at least some of neurilemma intact
BIO 203
,BIO 203
e. at least part of the neurosoma intact -Correct Answer ✔d. the neurosoma and at
least some of the neurilemma intact
Which of the following will cause the plasma membrane to hyperpolarize when at
its RMP?
a. an inflow of sodium
b. an inflow of potassium
c. an inflow of calcium
d. an inflow of chloride
e. an outflow of chloride -Correct Answer ✔d. an inflow of chloride
A neuron receives a stimulus. Which of the following events happens next?
a. a local potential develops
b. threshold is reached
c. hyperpolarization of the membrane
d. repolarization of the membrane
e. a resting membrane potential is established -Correct Answer ✔a. a local
potential develops
When the voltage of a plasma membrane shifts from +35 mV toward 0 mV, the
cell is __________.
a. depolarization
b. repolarization
c. hyperpolarization
d. reaching the threshold
e. exiting the threshold -Correct Answer ✔b. repolarization
All of the following are typical characteristics of neurotransmitters except
__________.
a. they are synthesized by a presynaptic neuron
BIO 203
, BIO 203
b. they are released in response to stimulation
c. they are released into the bloodstream before reaching the postsynaptic cell
d. they bind to specific receptors on the postsynaptic cell
e. they alter the physiology of the postsynaptic cell -Correct Answer ✔c. they are
released into the bloodstream before reaching the postsynaptic cell
Inhibitory postsynaptic potentials (IPSPs) are associated with which of the
following?
a. depolarization of the cell membrane
b. repolarization of the cell membrane
c. hyperpolarization of the cell membrane
d. no change in the cell membrane potential
e. no change of the threshold -Correct Answer ✔c. hyperpolarization of the cell
membrane
Which of these is an example of an EPSP in a typical neuron?
a. a voltage change from 0 mV to +0.35 mV
b. a voltage change from -70 mV to -69.5 mV
c. a voltage change from -69.5 mV to -70 mV
d. a voltage change from +35 mV to 0 mV
e. a voltage change from -70 mV to -70.5 mV -Correct Answer ✔b. a voltage
change from -70 mV to -69.5 mV
What is the opposite of presynaptic inhibition?
a. coding
b. integration
c. recruitment
d. summation
e. facilitation -Correct Answer ✔e. facilitation
BIO 203
