Human Physiology Neurophysiology
16 Questions
| Attempts: 380
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Questions and Answers
- 1.
These neurotransmitters use a direct mechanism:
- A.
ACh
- B.
GABA
- C.
Noepinephrine
Correct Answer(s)
A. ACh
B. GABA -
- 2.
During an excitatory synapse the neurotransmitter causes ___ ions to enter the postsynaptic neuron which results in ________________ of the neuron.
Correct Answer(s)
Na, depolarization - 3.
________ is the major excitatory neurotransmitter in the CNS and is actively transported back into synaptic bulbs and neuroglia cells.
- A.
Glumate
- B.
GABA
- C.
ACh
- D.
Aspartate
Correct Answer
A. Glumate -
- 4.
Most sensory synapses are _________. It is used at neuromuscular junctions.
Correct Answer
ACh - 5.
Inhibitory synapse happens when the neurotransmitter causes ___ ions to enter or ___ ions to exit the postsynaptic neuron which results in ______________ of the neuron.
Correct Answer
Cl, K, hyperpolarization - 6.
About 1/3 of the synapses in the brain uses this neurotransmitter
- A.
ACh
- B.
GABA
- C.
Noepinephrine
Correct Answer
B. GABA -
- 7.
Gaba is involved in ________ function and a deficience is responsible for uncontrolled _________. (Also mood and emotion).
Correct Answer
motor, movements - 8.
__________ is inhibitory and function by innervating the anagonistic muscles.
Correct Answer
Glycine - 9.
This uses indirect mechanism:
- A.
GABA
- B.
ACh
- C.
Norepinephrine
Correct Answer
C. Norepinephrine -
- 10.
______________ is a major neurotransmitter of the autonomic nervous system, involved in dreaming, maintaining arousal, and regulating mood.
Correct Answer
Norepinephrine - 11.
What are the two types of summation?
Correct Answer
Spatial, temporal - 12.
Spatial summation occurs when two action potentials arrive _____________ at ___________ presynaptic terminals that synapse with the _________ postsynaptic neuron.
Correct Answer
simultaneously, different, same - 13.
____________ summation results when two action potentials arrive in very close succession at a single presynaptic terminal.
Correct Answer
Temporal - 14.
Caffeine, benzedrine and nicotine ____________ the threshold for excitation of neurons and result in ___________.
Correct Answer
reduce, facilitation - 15.
A ______________ circuit consists of one presynaptic neuron and several postsynaptic neurons.
Correct Answer
diverging - 16.
A _____________ circuit consists of several presynaptc neurons and one postsynaptic neuron.
Correct Answer
converging
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Jan 29, 2013Quiz Edited by
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Sep 29, 2011Quiz Created by
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