Cortical tissue located between the pyramids is called the
A. calyx tissue.
B. renal papillae.
C. renal columns.
D. medullary rays.
E. renal corpuscles.
C
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Smooth muscle tissue in which cells are individually sent signals to contract (rather than contracting in unison) is referred to as
A. single-unit. B. multiunit.
A male is considered to be sterile if he produces less than how many spermatozoa in one ml of seminal fluid??
A) ?20 million B) ?50 million C) ?100 million D) ?150 million
All of the following are properties of cardiac muscle cells except
A) intercalated discs B) involuntary C) branching fibers D) shorter in duration of contraction than skeletal muscles.
These structures are seen in a midsagittal section of the human
A) stomach, kidney B) nose, umbilicus (navel) C) ribs, thigh D) trachea, lung