The number of protons in an atom is called the

A. atomic weight.
B. atomic number.
C. combining weight.
D. mass number.


Answer: B

Anatomy & Physiology

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_________ trigger(s) secretion of aldosterone.

A. Increased K+ B. Angiotensin II C. ANP D. Both a and b

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A hummingbird becomes ______________ when it relies on its energy reserves and drops its body temperature to conserve energy

Fill in the blank with the correct word.

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Mice that lack orexin have difficulty:

a. breathing at night. b. maintaining wakefulness. c. sleeping. d. waking up.

Anatomy & Physiology

Energy transformations result in ________ in entropy.

A. an increase B. no change C. a decrease

Anatomy & Physiology