Name the four characteristics of muscles: _________________________, __________________________, _________________________, and _________________________.?
Fill in the blank(s) with correct word
contractility, excitability, extensibility, elasticity
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When the heart is in fibrillation,
A) the myocardial cells deplete their oxygen supply because they are contracting too fast, and the lactic acid produced damages the myocardial cells. B) effective pumping of the ventricles ceases because the myocardial cells fail to work as a team, and the brain cannot get adequate oxygen. C) there is no contraction of the myocardium. D) the myocardial cells are contracting together as they should; fibrillation indicates a normal sinus rhythm of 75 beats per minute. E) the myocardial cells may become damaged from contracting too fast.
Spermatogenesis begins
A) at puberty. B) during embryogenesis. C) at birth. D) at age 3. E) at age 7.
What hormone is only present upon a successful fertilization
a. estrogen b. progesterone c. FSH d. LH e. hCG
Mast cells are ________
a. are transformed monocytes b. are a subset of B-cells c. a subset of T-cells d. are macrophages that remain in the circulation e. are analogous to sensing-integrating endocrine glands.