The adrenal medulla secretes mostly ________.
A. endorphins
B. norepinephrine (noradrenaline)
C. dopamine
D. acetylcholine (ACh)
E. epinephrine (adrenaline)
Answer: E
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Contraction of the spirally arranged cardiac muscle fibers produces a wringing effect for efficient pumping
Indicate whether the statement is true or false
Vasculogenesis refers to
A) the growth of new blood vessels from preexisting vessels. B) the development of heart tissue. C) the formation of the first vessels. D) the formation of arteries only. E) the formation of veins only.
Which skin layer contains all of the major tissue types, including epithelial tissue, connective tissues, muscle tissue, and nervous tissue?
A) Arrector pili B) Epidermis C) Dermis D) Subcutaneous E) Hypodermis