In order to contract and relax, muscle cells require energy in the form of ________. The immediate backup energy source is ________ that requires the enzyme ________.

What will be an ideal response?


ATP, phosphocreatine, creatine kinase

Anatomy & Physiology

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Which of the following is not a characteristic of a nonsteroid hormone?

a. Attaches to a receptor on the cell membrane b. Causes protein synthesis to occur c. Can use cAMP as a second messenger d. All of the above are characteristics of a nonsteroid hormone

Anatomy & Physiology

A(n) ________ is a homogeneous mixture containing a solvent and a solute.

Fill in the blank(s) with the appropriate word(s).

Anatomy & Physiology

Which of the following would NOT be transported during tubular resorption?

a) urea b) mineral ions c) amino acids d) water e) simple sugar

Anatomy & Physiology

Increases in secretion of the hormone ADH cause sodium concentration in the blood plasma to

A. increase. B. stay at the same level. C. decrease.

Anatomy & Physiology