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Anantomy Stack 2

6-12

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.
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
Which is true of an action potential? The outside of the plasma membrane is negatively charged, and the inside is positively charged.
Within the nervous system, coding for the strength of a stimulus is accomplished through: the frequency of nerve impulses.
No impulse can be sent through a neuron: during the absolute refractory period.
Not used by the body as a neurotransmitter? Nitric oxide , Acetylcholine , Carbon monoxide
A slight shift away from the resting membrane potentials in a specific region of the plasma membrane is called a _____ potential local
Stimulus-gated channels open in response to: sensory stimuli.
The only ion(s) that can diffuse across a neuron’s membrane when the neuron is at rest is (are): potassium.
There are two types of synapses—the electrical synapse and the __________ synapse. chemical
When an impulse reaches a synapse: chemical transmitters are released.
Amino Acid : T/F : They are all inhibitory neurotransmitters. F
The active transport mechanism in the plasma membrane that transports sodium and potassium ions in opposite directions and at different rates is the sodium-potassium pump.
Severe depression can be caused by a deficit in certain brain synapses of: amines
Which of the following antidepressants acts by blocking the action of monoamine oxidase (MAO)? Phenelzine
Neurotransmitters are released in a synapse and bind to: receptors on the postsynaptic neuron.
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.
When current leaps across an insulating myelin sheath from node to node, the type of impulse conduction is called: saltatory conduction.
T/F : The major function of the parasympathetic division is to serve as an “emergency” system. F
T/F : Blood vessels in both digestive organs and skeletal muscles are dilated by sympathetic stimulation. F
Impulses sent over which of the following tracts could result in voluntary movement, especially of the hands, fingers, feet, and toes of the opposite side? Lateral corticospinal
T/F : Conduction by the sixth cranial nerve results in sensations of hearing. F
Impulses from the _____ play a part in arousing or alerting the cerebrum. thalamus
Created by: ZBowman26
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