BIO 181 ASU CAPCO EXAM 3 STUDY GUIDE
2026 VERIFIED CONTENT AND ANSWERS
OUTLINE PACK
◉ Draw a neuron, and label all the parts as described in lecture.
◉ Briefly explain why the action potential flows only from the axon
hillock to the terminal web. The action potential originates from
the axon hillock which initiates the flow of the action potential
because of the presence of higher density voltage-gated ion
channels.
◉ T/F Acetylcholine exocytosed from the presynaptic cell travels to
the postsynaptic cell to start the action potential in the postsynaptic
cell. True
◉ How do the glial cells (i.e., myelin sheath) speed up the firing of
neurons? The cell wraps extensions of a fatty insulating substance
(myelin) around the axons of neurons which increase the speed
because the action potential jumps from each node of ranvier rather
than going down the entire length and firing each Na+K+ pump.
◉ The terminal web: Is a site of exocytosis
, ◉ T/F Potassium ions are at high concentrations inside of cells
including in neurons.True
◉ T/F Excitatory synapses make the post-synaptic cell less likely to
fire. False
◉ T/F Vitamin D is synthesized from cholesterol True
◉ When epinephrine is released it triggers activation of which part
of the Autonomic Nervous System? Sympathetic Nervous System.
◉ T/F Insulin is produced by alpha cells. False
◉ T/F When the Sympathetic nervous system is triggered glycogen
is broken down to glucose to provide more energy. True
◉ T/F The medulla of the adrenal gland produces epinephrine (i.e.,
adrenaline). True
◉ Your mom came back from her medical appointment and said that
the M.D. told her she had low bone density. What medical problem
could this cause and what hormones/endocrine glands in the body
2026 VERIFIED CONTENT AND ANSWERS
OUTLINE PACK
◉ Draw a neuron, and label all the parts as described in lecture.
◉ Briefly explain why the action potential flows only from the axon
hillock to the terminal web. The action potential originates from
the axon hillock which initiates the flow of the action potential
because of the presence of higher density voltage-gated ion
channels.
◉ T/F Acetylcholine exocytosed from the presynaptic cell travels to
the postsynaptic cell to start the action potential in the postsynaptic
cell. True
◉ How do the glial cells (i.e., myelin sheath) speed up the firing of
neurons? The cell wraps extensions of a fatty insulating substance
(myelin) around the axons of neurons which increase the speed
because the action potential jumps from each node of ranvier rather
than going down the entire length and firing each Na+K+ pump.
◉ The terminal web: Is a site of exocytosis
, ◉ T/F Potassium ions are at high concentrations inside of cells
including in neurons.True
◉ T/F Excitatory synapses make the post-synaptic cell less likely to
fire. False
◉ T/F Vitamin D is synthesized from cholesterol True
◉ When epinephrine is released it triggers activation of which part
of the Autonomic Nervous System? Sympathetic Nervous System.
◉ T/F Insulin is produced by alpha cells. False
◉ T/F When the Sympathetic nervous system is triggered glycogen
is broken down to glucose to provide more energy. True
◉ T/F The medulla of the adrenal gland produces epinephrine (i.e.,
adrenaline). True
◉ Your mom came back from her medical appointment and said that
the M.D. told her she had low bone density. What medical problem
could this cause and what hormones/endocrine glands in the body
