The movement of which two ions is responsible for maintaining the plateau phase of the action potential of contractile cardiac muscle cells?
a. Na+ and Cl-
b. Na+ and K+
c. K+ and Cl-
d. Ca2+ and Na+
e. Ca2+ and K+
E
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Glands that release their product to a surface via a duct are referred to as __________ glands.
A. exocrine B. holocrine C. apocrine D. endocrine E. merocrine
Excessive loss of water from the extracellular fluid (ECF) leads to a rise in osmotic pressure in the ECF which causes cells to shrink as water leaves by osmosis
Indicate whether the statement is true or false
Anabolic steroids are variants of the male sex hormone ____
a. estrogen b. progesterone c. testosterone d. prolactin
The declining FSH levels during the follicular phase results in most of the developing follicles to undergo
A) Conversion into corpora lutea. B) Degeneration by atresia. C) Development into nurse cells. D) Development into Graafian follicles.