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8/28 Patho SI Flashcards | StudBud
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8/28 Patho SI
8/28 Patho SI
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Questions
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Answers
1
What is the correct pairing of nerve to what it releases? (select all that apply)
sympathetic post-gang. to sweat glands = EPI
parasympathetic pre-gang. = ACh
somatic motor neuron = ACh
sympathetic pre-gang. = NE
parasympathetic post-gang. = NE
sympathetic post-gang. = NE
2
What effect does INCREASING extracellular K+ have on the resting membrane potential?
No effect
increases resting membrane potential (depolarizes)
decreases resting membrane potential (hyperpolarizes)
3
What kind of ion channels are activated by extracellular neurotransmitters or intracellular second messengers?
Ligand-Gated
Voltage-Gated
Both Ligand-Gated and Voltage-Gated
None of the above
4
Which of the following is true?
Low-frequency stimulation releases both small NTs and neuropeptides
Low-frequency stimulation preferentially releases only small NTs
Neurons can only release one type of neurotransmitter.
High-frequency stimulation preferentially releases only neuropeptides
5
What type of synaptic transmission is a direct passive flow of electrical current from one neuron to another?
Electrical Synapse
Chemical Synapse
6
Match the correct pair of type of neurotransmitter to where their pre-synaptic events take place. (select all that apply
small NT -- packaged in vesicles in the synaptic terminal
small NT -- vesicles of NTs are transported down the axon to the terminal
neuropeptide -- synthesized by enzymes in the synaptic terminal
neuropeptide -- NTs are packaged into vesicles in cytoplasm of nerve body
small NT -- enzymes used to make them are transported down axon to terminal
neuropeptide -- enzymes used to make them are synthesized by DNA
7
The stronger the stimuli that reaches threshold, the larger the action potential.
True
False
