10 Questions
What enzyme catalyzes the cleavage of cAMP to AMP?
Phosphodiesterase
Which feedback loop occurs when a later part of the pathway stimulates an earlier part of the same pathway?
Positive feedback loop
At what voltage does the resting membrane potential typically stay at?
-70mV
What phenomenon occurs when excitatory impulses add together to reach the threshold to fire a neuron?
Summation of impulse
Which receptors are glutamate-responsive ion channels that promote action potential formation upon activation?
NMDA receptors
What occurs when a later part of a pathway inhibits an earlier part to help maintain homeostasis?
Negative feedback loop
Which substance allows the action potential to take on a salutary conduction?
Myelin Sheaths
When does temporal summation occur?
When excitatory impulses add together in close temporal succession
What does the all or none phenomenon refer to in neuron physiology?
Threshold and suprathreshold stimulation producing the same magnitude of action potential
Which phenomenon describes the effects of impulses summing up at different locations on one neuron?
Spatial summation
Test your knowledge about different types of receptors in the body such as photoreceptors, chemoreceptors, and mechanoreceptors, as well as various medical imaging scans like MRI, EEG, CT scans, and PET scans.
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