Synapses

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Question 1
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 Transmission of information between neurons occurs in the same way as transmission along an axon.

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Question 2
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 A reflex arc contains specialized motor neurons that detect and execute the reflex.

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Question 3
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 At synapses, the cell that receives the message is called the presynaptic neuron.

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Question 4
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 Neurons communicate with both electrical and chemical signals. Scientists have shown that chemical communication is the preferred form as it is faster.

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Question 5
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 The amount of temporal summation depends on the rate of stimulation.

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Question 6
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 Spatial summation is the result of synaptic inputs from different locations arriving at the same time.

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Question 7
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 Inhibitory synapses actively suppress excitatory responses.

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Question 8
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 Nitric oxide (NO) can function as a hormone.

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Question 9
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 Dr. Lattimer studies how the neurotransmitter dopamine is synthesized from tryptophan from the diet.

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Question 10
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 Most of the known neurotransmitters are synthesized from amino acids.

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Question 11
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 Professor Wick is teaching about neurotransmitter release and told his class that each neuron releases one kind of hormone.

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Question 12
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 Generally speaking, a neuron will release a greater number of neurotransmitters than what it will respond to with its own receptors.

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Question 13
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 Whether or not a neurotransmitter is excitatory depends on the response of the postsynaptic receptor.

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Question 14
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 Most of the brain's excitatory ionotropic synapses use the neurotransmitter glutamate.

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Question 15
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 Metabotropic synapses use a large variety of transmitters.

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Question 16
Multiple Choice

 Charles S. Sherrington was the first to infer the properties of ____ .

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A
synapses
B
the refractory period
C
the sodium-potassium pump
D
dendrites and axons
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Question 17
Multiple Choice

 Sherrington studied ____ , which are automatic muscular responses to stimuli.

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A
instincts
B
reflexes
C
inhibitions
D
aversions
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Question 18
Multiple Choice

 Winnifred is in the lab drawing illustrations of neurons in her lab notebook. She labeled the specialized area between two neurons as the _____ .

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A
synapse
B
axon hillock
C
node of Ranvier
D
vesicle
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Question 19
Multiple Choice

 On the basis of what evidence were the properties of synapses first inferred?

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A
The electron microscope
B
Single-neuron recordings
C
Behavioral observations
D
PET scans
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Question 20
Multiple Choice

 The circuit from sensory neuron to muscle response is called ____ .

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A
a reflex arc
B
a synapse
C
flexion
D
extension
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