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PSU Bio 141 Exam 2/ Expert Verified
Questions With Answers
What is acetylcholine (Ach)-correct-answer-the most plentiful neurotransmitter in
the body, released by nerve cells, especially active in neuromuscular junctions
(cardiac, skeletal, and smooth)
Excitatory: muscle contraction
Inhibitory: reduction of signaling, like reduction of HR
Which receptors pick up ACh-correct-answer-cholinergic receptors
Sarin gas-correct-answer-inhibits AChl; interferes with the degradation of ACh in
the synapse (neuromuscular junction); leads to muscle tetani, inability to control
the muscles.
Atropine-correct-answer-inhibits muscarinic ACh receptors
CNS-correct-answer-spinal cord and tissue, sensory info, executing motor
commands, higher functioning, both cell bodies and axons
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PNS-correct-answer-all neural tissue except CNS, mainly composed of nerves
grouped together in bundles of axons
the only place to find cell bodies are in ganglions
Afferent neurons-correct-answer-sensory neurons
3 classes of afferent neurons-correct-answer-somatic
visceral
special
somatic afferent neurons-correct-answer-neurons of the bones, muscles, and skin
visceral afferent neurons-correct-answer-neurons of the organs
special afferent neurons-correct-answer-neurons involved in hearing, sight, taste,
smell
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interneurons-correct-answer-only located in the CNS
efferent neurons-correct-answer-motor neurons
2 classes of efferent neurons-correct-answer-somatic and visceral
Visceral Sensory Receptors-correct-answer-input from internal organs, many of
these receptors are chemoreceptors (use chemicals)
Somatic Sensory Neurons-correct-answer-collect information from the skins,
muscles, joints, and bones, monitored by receptor cells, stimulus will cause gated-
channels to open and depolarize the neuron
Why are some parts of the body more sensitive than others?-correct-answer-the
density of sensory neurons vary over different tissues; the more sensory neurons,
the more space the brain requires to integrate the information
PSU Bio 141 Exam 2/ Expert Verified
Questions With Answers
What is acetylcholine (Ach)-correct-answer-the most plentiful neurotransmitter in
the body, released by nerve cells, especially active in neuromuscular junctions
(cardiac, skeletal, and smooth)
Excitatory: muscle contraction
Inhibitory: reduction of signaling, like reduction of HR
Which receptors pick up ACh-correct-answer-cholinergic receptors
Sarin gas-correct-answer-inhibits AChl; interferes with the degradation of ACh in
the synapse (neuromuscular junction); leads to muscle tetani, inability to control
the muscles.
Atropine-correct-answer-inhibits muscarinic ACh receptors
CNS-correct-answer-spinal cord and tissue, sensory info, executing motor
commands, higher functioning, both cell bodies and axons
,2|Page
PNS-correct-answer-all neural tissue except CNS, mainly composed of nerves
grouped together in bundles of axons
the only place to find cell bodies are in ganglions
Afferent neurons-correct-answer-sensory neurons
3 classes of afferent neurons-correct-answer-somatic
visceral
special
somatic afferent neurons-correct-answer-neurons of the bones, muscles, and skin
visceral afferent neurons-correct-answer-neurons of the organs
special afferent neurons-correct-answer-neurons involved in hearing, sight, taste,
smell
, 3|Page
interneurons-correct-answer-only located in the CNS
efferent neurons-correct-answer-motor neurons
2 classes of efferent neurons-correct-answer-somatic and visceral
Visceral Sensory Receptors-correct-answer-input from internal organs, many of
these receptors are chemoreceptors (use chemicals)
Somatic Sensory Neurons-correct-answer-collect information from the skins,
muscles, joints, and bones, monitored by receptor cells, stimulus will cause gated-
channels to open and depolarize the neuron
Why are some parts of the body more sensitive than others?-correct-answer-the
density of sensory neurons vary over different tissues; the more sensory neurons,
the more space the brain requires to integrate the information
