Assume that a single IPSP (inhibitory postsynaptic potential) has a negative magnitude of -0.5 mV at the axon hillock, and that a single EPSP (excitatory postsynaptic potential) has a positive magnitude of +0.5 mV. For a neuron with an initial membrane potential of -70 mV, the net effect of the simultaneous arrival of six IPSPs and two EPSPs would be to move the membrane potential to:
Select one:
a. -72 mV
b. -70 mV
c. -68 mV
d. -69 mV
e. -71 mV
When blood sugar is low, which of the following is released into the blood?
Select one:
a. acetylcholine
b. glucagon
c. antidiuretic hormone (ADH)
d. insulin
e. oxytocin
Nervous system cells that are not neurons but help support the function of neurons are called:
Select one:
a. autonomic cells
b. grey matter
c. glial cells
d. parasympathetic cells
e. sympathetic neural cells
In the suckling response during breastfeeding, the hormone that promotes milk release is:
Select one:
a. follicle stimulating hormone
b. oxytocin
c. glucagon
d. lactose
e. lutenizing hormone
All photoreceptors, in all organisms, have the following in common:
Select one:
a. they detect red, blue, and yellow
b. they contain a light-absorbing pigment
c. they use lenses
d. they are motor neurons
e. they are modified hair cells
Functionally, which cellular location is the neuron's "decision-making site" as to whether or not an action potential will be initiated?
Select one:
a. the axon nucleus
b. the axon excitatory membrane
c. the axon hillock
d. the axon resurginator
e. the axon dendrite