Smooth muscle contractions help to propel sperm cells in the ________.

A. seminiferous tubule
B. seminal receptacle
C. rete testis
D. ejaculatory duct
E. ductus deferens


Answer: E

Anatomy & Physiology

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If you are exposed to hepatitis A and have not been vaccinated against it, you may receive antibodies from another person. This is an example of ________

A) Natural passive immunity B) Natural active immunity C) Artificial active immunity D) Artificial passive immunity

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Heat energy gained from muscle contraction is released by the ________ system

A) integumentary B) respiratory C) cardiovascular D) urinary E) endocrine

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When elements found in column VIA of the periodic table become ions, they usually have a charge of

A. -2.?B. -1.?C. +1.?D. +2.?E. +3.

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