Which of the following body parameters is NOT homeostatically maintained?
a. concentration of blood sugar
b. concentration of dissolved gases
c. blood volume
d. blood pressure
e. urine volume
e
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The vestibular complex includes the
A) cochlea and organ of Corti. B) cochlea and tympanic membrane. C) vestibule and semicircular canals. D) vestibule and cochlea. E) auditory ossicles and oval window.
When a blood vessel dilates, velocity of blood is ________.
Fill in the blank(s) with the appropriate word(s).
At an excitatory synapse, an action potential in the presynaptic neuron increases
a. the membrane potential of the postsynaptic cell membrane b. the permeability of the postsynaptic cell to Na+ c. the permeability of the postsynaptic cell to Cl- d. the presynaptic neuron's membrane potential e. all of the above
How much of the blood glucose does the brain use when a person is at rest?
A. 30% B. 40% C. 80% D. 60%