BIOL 251 HUMAN ANATOMY AND PHYSIOLOGY I WITH LAB UPDATED 2026
MODULE 6 250 EXAM QUESTIONS COURSE VERIFIED ANSWERS HIGH-YIELD
STUDY GUIDE GRADED A+
A patient has difficulty with auditory reflexes after head trauma. Imaging shows
damage to a brain structure within the midbrain. What structure has been
affected?
True
T/F The central nervous system (CNS) can send and receive signals to and from
the peripheral nervous system (PNS).
The depolarization of the membrane to the threshold at the axon hillock.
The initiation of an action potential depends on:
-Stabilization of the membrane at its resting potential.
-The hyperpolarization of the axon.
-A decrease in graded potentials within the dendrites.
-The depolarization of the membrane to the threshold at the axon hillock.
Hyperpolarization
Which process involves increasing the negative value of the membrane
potential?
Depolarization
,Repolarization
Hyperpolarization
Resting potential
Somatic sensory receptors
If a receptor is detecting the positioning of muscles or joints, it falls under
which category?
-Somatic sensory receptors
-Visceral receptors
-Special receptors
-Internal sensory receptors
To power the sodium-potassium pumps essential for nerve impulses
Why do neurons require a large number of mitochondria?
-To replace damaged neurons through mitosis
-To conduct nerve impulses along the axon
-To synthesize neurotransmitters at the axon terminals
-To power the sodium-potassium pumps essential for nerve impulses
True
,T/F Neurotransmitters travel across the synaptic cleft from the presynaptic
neuron to the postsynaptic neuron.
The axon can generate another action potential only with stronger-than-normal
stimulation.
Which statement correctly explains the relative refractory period during an
action potential?
-The axon can generate another action potential only with stronger-than-normal
stimulation.
-It prevents the axon from responding to any stimulation.
-Sodium channels are completely inactivated during this phase.
-Motor functions and have multiple dendrites.
Multipolar neurons are primarily associated with:
-Motor functions and have multiple dendrites.
-Sensory functions in the peripheral nervous system.
-None of the above.
-Special receptor cells in the retina and olfactory bulb.
True
T/F Bipolar neurons have two processes: one dendrite and one axon.
To transmit impulses from the periphery to the CNS.
, What is the primary role of sensory neurons?
-To carry information from the CNS to muscles or glands.
-To connect sensory neurons and motor neurons within the CNS.
-To send signals from the CNS through the ventral root.
- To transmit impulses from the periphery to the CNS.
Action potentials are an all-or-nothing response.
Which of the following is TRUE about action potentials?
-The threshold for generating an action potential is around -90 mV.
-Action potentials are an all-or-nothing response.
-The strength of an action potential varies depending on the intensity of a
stimulus.
-Continuous propagation occurs faster than saltatory conduction.
Ependymal cells
What type of neuroglial cell lines the ventricles and central canal of the spinal
cord?
-Astrocytes
-Oligodendrocytes
-Microglial cells
MODULE 6 250 EXAM QUESTIONS COURSE VERIFIED ANSWERS HIGH-YIELD
STUDY GUIDE GRADED A+
A patient has difficulty with auditory reflexes after head trauma. Imaging shows
damage to a brain structure within the midbrain. What structure has been
affected?
True
T/F The central nervous system (CNS) can send and receive signals to and from
the peripheral nervous system (PNS).
The depolarization of the membrane to the threshold at the axon hillock.
The initiation of an action potential depends on:
-Stabilization of the membrane at its resting potential.
-The hyperpolarization of the axon.
-A decrease in graded potentials within the dendrites.
-The depolarization of the membrane to the threshold at the axon hillock.
Hyperpolarization
Which process involves increasing the negative value of the membrane
potential?
Depolarization
,Repolarization
Hyperpolarization
Resting potential
Somatic sensory receptors
If a receptor is detecting the positioning of muscles or joints, it falls under
which category?
-Somatic sensory receptors
-Visceral receptors
-Special receptors
-Internal sensory receptors
To power the sodium-potassium pumps essential for nerve impulses
Why do neurons require a large number of mitochondria?
-To replace damaged neurons through mitosis
-To conduct nerve impulses along the axon
-To synthesize neurotransmitters at the axon terminals
-To power the sodium-potassium pumps essential for nerve impulses
True
,T/F Neurotransmitters travel across the synaptic cleft from the presynaptic
neuron to the postsynaptic neuron.
The axon can generate another action potential only with stronger-than-normal
stimulation.
Which statement correctly explains the relative refractory period during an
action potential?
-The axon can generate another action potential only with stronger-than-normal
stimulation.
-It prevents the axon from responding to any stimulation.
-Sodium channels are completely inactivated during this phase.
-Motor functions and have multiple dendrites.
Multipolar neurons are primarily associated with:
-Motor functions and have multiple dendrites.
-Sensory functions in the peripheral nervous system.
-None of the above.
-Special receptor cells in the retina and olfactory bulb.
True
T/F Bipolar neurons have two processes: one dendrite and one axon.
To transmit impulses from the periphery to the CNS.
, What is the primary role of sensory neurons?
-To carry information from the CNS to muscles or glands.
-To connect sensory neurons and motor neurons within the CNS.
-To send signals from the CNS through the ventral root.
- To transmit impulses from the periphery to the CNS.
Action potentials are an all-or-nothing response.
Which of the following is TRUE about action potentials?
-The threshold for generating an action potential is around -90 mV.
-Action potentials are an all-or-nothing response.
-The strength of an action potential varies depending on the intensity of a
stimulus.
-Continuous propagation occurs faster than saltatory conduction.
Ependymal cells
What type of neuroglial cell lines the ventricles and central canal of the spinal
cord?
-Astrocytes
-Oligodendrocytes
-Microglial cells
