lek ton movements across the membrane occur during the depolarization and repola
ID: 3516034 • Letter: L
Question
lek ton movements across the membrane occur during the depolarization and repolarization phases of an action potential, they are moving by A) primary active transport. B) secondary active transport C) exocytosis. D) fltration. E) simple diffusion 25) The after-hyperpolarization that follows an action potential occurs due to a rapid A) outflow of sodium ions. B) outflow of potassium ions C) infux of sodium ions. D) influx of potassium ions. E) release of neurotransmitter. The factor most affecting the rate of impulse conduction is the A) length of the axon. B) site of initial stimulation. C) rate of axonal D) number of neuro?liá associated with it. E) presence or absence of a myelin sheath. 26) 27) The term saltatory conduction refers to A) "leaping" of an action potential across a synapse. B) movement of sodium ions into the cell during depolarization. C) one-way conduction of a nerve impulse across a synapse. D) conduction of a nerve impulse along a myelinated axon E) action of the sodium-potassium pump. 28) The period of time during which a second action potential can be initiated is calld A) absolute refractory period. B) all of nothing. C) relative refractory period. D) excitatory refractory period. The effect of a neurotransmitter on the postsynaptic cell occurs when the neurotransmitter A) diffuses into the postsynaptic cell. B) flows along the postsynaptic cell membrane into transverse tubules. C) is broken down by enzymes in the synaptic cleft. D) actively transports sodium ions into the postsynaptic cell. E) binds to specific receptors on the postsynaptic cell membrane. 29)Explanation / Answer
24) when the movements across the cell membrane during the depolarization and repolarization phases of the action potential, they are moving by
Answer- B) secondary active transport
25) The after-hyperpolarization that follows an action potential occurs due to a rapid
Answer- B) outflow of potassium ions
26) The factor most affecting the rate of impulse conduction is the
Answer- E) presence or absence of a myelin sheath
27) The term saltatory conduction refers to
Answer- D) conduction of a nerve impulse along a myelinated axon.
28) The period of time during which a second action potential can be initiated is called
Answer- C) relative refractory period
29) The effect of a neurotransmitter on the postsynaptic cell occurs when the neurotransmitter
Answer- E) Binds to specific receptors on the postsynaptic cell membrane
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