Actin
a. has ATPase activity.
b. is spherical.
c. forms a helical chain that forms the main structural component of the thin filaments.
d. two of these answers.
e. all of these answers.
D
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Target cells for releasing hormones are in the
A. thyroid gland. B. posterior pituitary gland. C. hypothalamus. D. anterior pituitary gland.
The main parts of the juxtaglomerular apparatus are the
A. principal cells and macula densa. B. granular cells and macula densa. C. granular cells and intercalated cells. D. intercalated cells and principal cells. E. principal cells and granular cells.
Vitamins directly provide energy
Indicate whether the statement is true or false
The rarest structural type of neuron is a bipolar neuron.
Answer the following statement true (T) or false (F)