BIO 151 FINAL Exam Questions and
Verified Answers, 100% Score Guarantee
Pass (Latest 2025)
Action potentials move along axons
A) by activating the sodium-potassium "pump" at each
point along the axonal membrane.
B) by the direct action of acetylcholine on the axonal
membrane.
C) by reversing the concentration gradients for sodium
and potassium ions.
D) more slowly in axons of large than in small diameter.
E) more rapidly in myelinated than in non-myelinated
axons. - Correct Answers ✅E) more rapidly in
myelinated than in non-myelinated axons.
As you prepare to head off to class, you reach up to grab
a pencil, but poke the tip of your finger. Quickly, and
without thinking, you pull your hand back. Which of the
following is the correct sequence of neuronal action
involved in this reflexive response?
A) interneuron, sensory neuron, motor neuron
B) motor neuron, sensory neuron, interneuron
C) sensory neuron, motor neuron, interneuron
D) sensory neuron, interneuron, motor neuron
,BIO 151 FINAL Exam Questions and
Verified Answers, 100% Score Guarantee
Pass (Latest 2025)
E) motor neuron, interneuron, sensory neuron - Correct
Answers ✅D) sensory neuron, interneuron, motor
neuron
Cephalization, the clustering of neurons and interneurons
in the anterior part of the animal, is apparent in
A) Planaria.
B) cnidarians.
C) sea stars.
D) invertebrate animals with radial symmetry.
E) Hydra. - Correct Answers ✅A) Planaria.
For a neuron with an initial membrane potential at -70
mV, an increase in the movement of potassium ions out
of that neuron's cytoplasm would result in
A) the replacement of potassium ions with calcium ions.
B) the hyperpolarization of the neuron.
C) the neuron switching on its sodium-potassium pump to
restore the initial conditions.
D) the depolarization of the neuron.
, BIO 151 FINAL Exam Questions and
Verified Answers, 100% Score Guarantee
Pass (Latest 2025)
E) the replacement of potassium ions with sodium ions. -
Correct Answers ✅B) the hyperpolarization of the
neuron.
Neurotransmitters are released from axon terminals via
A) diffusion.
B) transcytosis.
C) exocytosis.
D) active transport.
E) osmosis. - Correct Answers ✅C) exocytosis.
The "selectivity" of a particular ion channel refers to its
A) binding with only one type of neurotransmitter.
B) permitting passage by positive but not negative ions.
C) permitting passage by negative but not positive ions.
D) ability to change its size depending on the ion needing
transport.
E) permitting passage only to a specific ion. - Correct
Answers ✅E) permitting passage only to a specific ion.
Verified Answers, 100% Score Guarantee
Pass (Latest 2025)
Action potentials move along axons
A) by activating the sodium-potassium "pump" at each
point along the axonal membrane.
B) by the direct action of acetylcholine on the axonal
membrane.
C) by reversing the concentration gradients for sodium
and potassium ions.
D) more slowly in axons of large than in small diameter.
E) more rapidly in myelinated than in non-myelinated
axons. - Correct Answers ✅E) more rapidly in
myelinated than in non-myelinated axons.
As you prepare to head off to class, you reach up to grab
a pencil, but poke the tip of your finger. Quickly, and
without thinking, you pull your hand back. Which of the
following is the correct sequence of neuronal action
involved in this reflexive response?
A) interneuron, sensory neuron, motor neuron
B) motor neuron, sensory neuron, interneuron
C) sensory neuron, motor neuron, interneuron
D) sensory neuron, interneuron, motor neuron
,BIO 151 FINAL Exam Questions and
Verified Answers, 100% Score Guarantee
Pass (Latest 2025)
E) motor neuron, interneuron, sensory neuron - Correct
Answers ✅D) sensory neuron, interneuron, motor
neuron
Cephalization, the clustering of neurons and interneurons
in the anterior part of the animal, is apparent in
A) Planaria.
B) cnidarians.
C) sea stars.
D) invertebrate animals with radial symmetry.
E) Hydra. - Correct Answers ✅A) Planaria.
For a neuron with an initial membrane potential at -70
mV, an increase in the movement of potassium ions out
of that neuron's cytoplasm would result in
A) the replacement of potassium ions with calcium ions.
B) the hyperpolarization of the neuron.
C) the neuron switching on its sodium-potassium pump to
restore the initial conditions.
D) the depolarization of the neuron.
, BIO 151 FINAL Exam Questions and
Verified Answers, 100% Score Guarantee
Pass (Latest 2025)
E) the replacement of potassium ions with sodium ions. -
Correct Answers ✅B) the hyperpolarization of the
neuron.
Neurotransmitters are released from axon terminals via
A) diffusion.
B) transcytosis.
C) exocytosis.
D) active transport.
E) osmosis. - Correct Answers ✅C) exocytosis.
The "selectivity" of a particular ion channel refers to its
A) binding with only one type of neurotransmitter.
B) permitting passage by positive but not negative ions.
C) permitting passage by negative but not positive ions.
D) ability to change its size depending on the ion needing
transport.
E) permitting passage only to a specific ion. - Correct
Answers ✅E) permitting passage only to a specific ion.
