The withdrawal reflex A) is monosynaptic B) is caused by stretching muscle spind
ID: 3509552 • Letter: T
Question
The withdrawal reflex A) is monosynaptic B) is caused by stretching muscle spindles in a muscle C) is caused by tapping the patellar tendon D) response is due to EPSPs occurring in motor neurons going to the agonist (flexor muscle) and IPSPs occurring in motor neurons going to the antagonist(extensor muscle) E) A, B, and C
Select the LEAST correct or NOT a correct match. (Hint: causes means increased activity in the neurons has the effect listed) A) its fibers use use some of the cranial nerves -sympathetic nervous system B) causes adjustment for near vision - parasympathetic nervous system C) causes constriction of blood vessels -sympathetic nervous system D) causes contraction of arrector pili muscles -sympathetic nervous system E) causes contraction the circular fibers of the iris -parasympathetic nervous system
How is a particular skeletal muscle contraction prevented from occurring? A) IPSPs occur in the central nervous system B) skeletal muscle cells become hyperpolarized to prevent action potentials C) an inhibitory neurotransmitter is released and binds to receptors on the motor end plate D) inhibitory end plate potentials occur E) B, C, and D
Explanation / Answer
1. Correct answer:- (D) Response is due to EPSPs occurring in motor neurons going to the agonist (flexor muscle) and IPSPs occurring in motor neurons going to the antagonist(extensor muscle).
2. Correct answer:- (E) causes contraction the circular fibers of the iris -parasympathetic nervous system
3. Correct answer:- (E) B,C,D
Explanation:- contraction in skeletal muscle can be prevented by
skeletal muscle cells hyperpolarized to prevent action potentials
an inhibitory neurotransmitter is released and binds to
receptors on the motor end plate
inhibitory end plate potentials occur.
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