What is the main stimulus for secretion of the hormone aldosterone from the adrenal cortex?
a. angiotensin I
b. angiotensin II
c. renin
d. sodium ions
e. chloride ions
b
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Physical evidence that supports the sliding filament theory of muscle contraction includes
A) Increased width of the H band during contraction. B) Decreased distance between Z lines during contraction. C) Increased width of the I band during contraction. D) Decreased width of the A band during contraction. E) An increased distance between Z lines during contraction.
When an ionic bond forms, which part(s) of the atoms are directly involved?
A. both the protons and the electrons B. the protons C. the outermost electrons D. the neutrons
Excitable cells respond to outside stimuli by means of changes in plasma membrane shape.
Answer the following statement true (T) or false (F)
Olfactory information is first received by which part of the brain?
A) pons B) cerebellum C) thalamus D) cerebrum E) medulla oblongata