Page 78 - 84 human physiolofy part-1

Chapter 4

Review Questions

1. The junction between one neuron and the next, or between a neuron and an effector is called:

A ) A synapse
B ) A dendrite
C ) A neuotransmitter
D ) A ventricle
E ) None of the above

2. A fast excitatory synapses follows this order:

A ) (1) neurotransmitter released (2) diffused across the synaptic cleft to a receptor protein (3)
binding of the transmitter opens pores in the ion channels and positive ions move in.
B ) (1) neurotransmitter released (2) diffused across the synaptic cleft to a receptor protein (3)
binding of the transmitter opens pores in the ion channels and negative ions move in.
C ) (1) neurotransmitter released (2) diffused across the synaptic cleft to a receptor amino acid (3)
binding of the transmitter opens pores in the ion channels and positive ions move in.
D ) (1) diffused across the synaptic cleft to a receptor protein (2) neurotransmitter released (3)
binding of the transmitter opens pores in the ion channels and positive ions move in.
E ) None of the above

3. Resting potential is

A ) excess positive ions accumulate inside the plasma membrane
B ) excess negative ions accumulate inside the plasma membrane
C ) excess positive ions accumulate outside the plasma membrane
D ) excess positive ions accumulate outside the plasma membrane
E ) both b & d
F ) both a & b

4. Sensory neurons have:

A ) A short dendrite and a long axon
B ) A short dendrite and a short axon
C ) A long dendrite and a short axon
D ) A long dendrite and a long axon
E ) Their axons and dendrites may be either long or short

5. ________blocks Acetylcholine receptor sites causing muscle relaxation.

A ) Novocain
B ) curare
C ) Nicotine
D ) Nerve gases

6. Transmission across a synapse is dependent on the release of _______?

A ) neurotransmitters

78 | Human Physiology