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Physiology Wk 7 Quiz

QuestionAnswer
Which neuron could transmit a nerve impulse the fastest? a large diameter neuron with myelin
A synaptic knob would be located on a(n): axon
A synaptic knob would be located on a(n): 130
Compared with the outside of the neuron, the inside has a(n) ____ charge. negative
Acetylcholine is in the same class of neurotransmitters as: none
Which of the following antidepressants acts by blocking the action of monoamine oxidase (MAO)? Phenelzine
Severe depression can be caused by a deficit in certain brain synapses of: amines
Which is true of a neuron with a resting potential? The sodium pump has moved Na+ to the outside of the plasma membrane.
Neurotransmitters are released in a synapse and bind to: receptors on the postsynaptic neuron.
Within the nervous system, coding for the strength of a stimulus is accomplished through: the frequency of nerve impulses
Dopamine, epinephrine, and norepinephrine are classified as: catecholamines.
Which of the following is true of spatial summation? Neurotransmitters released simultaneously from several presynaptic knobs converge on one postsynaptic neuron.
When an impulse reaches a synapse: chemical transmitters are released.
Which of the following is not one of the main chemical classes of neurotransmitters? triglycerides
Which is true of an action potential? The outside of the plasma membrane is negatively charged, and the inside is positively charged.
During a relative refractory period: the action potential can be initiated with a strong stimulus.
Excitatory neurotransmitters are most likely to: initiate an action potential.
Which of the following is not used by the body as a neurotransmitter? All: Nitric Acid, Acetylcholine, and Carbon monoxide are all used by the body as neurotransmitters,
A slight shift away from the resting membrane potentials in a specific region of the plasma membrane is called a _____ potential. local
The fastest nerve fibers in the body can conduct an impulse that is how much faster than the slowest fibers in the body? Almost 300 times faster
Stimulus-gated channels open in response to: sensory stimuli
The neurotransmitter(s) that inhibit(s) the conduction of pain impulses is(are): enkephalins.
Serotonin is an example of a(n): amine neurotransmitter.
For a neurotransmitter to produce an inhibitory postsynaptic potential, which of the following channels must open? Potassium and/or chloride channels
Which of the following statements about amino acid neurotransmitters is incorrect? They are all inhibitory neurotransmitters.
No impulse can be sent through a neuron: during the absolute refractory period.
When current leaps across an insulating myelin sheath from node to node, the type of impulse conduction is called: saltatory conduction.
The only ion(s) that can diffuse across a neuron’s membrane when the neuron is at rest is (are): Potassium
The first event to occur when an adequate stimulus is applied to a neuron is: some of the sodium channels at the point of stimulation open
A synapse consists of: All: a synaptic knob, a synaptic cleft, the plasma membrane of a postsynaptic neuron.
Created by: Janelleu4771
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