When it is cold, the ________ contracts and draws the testes closer to the body to keep them warm.

A. perineum
B. corpus cavernosum
C. cremaster 
D. corpus spongiosum
E. pampiniform plexus


Answer: C

Anatomy & Physiology

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Tetanic muscle contractions don't occur in a normal cardiac muscle because

A) cardiac muscle tissue contracts on its own. B) neural stimulation is lacking. C) the refractory period lasts until the muscle relaxes. D) the refractory period ends before the muscle reaches peak tension. E) potassium channels outnumber sodium channels.

Anatomy & Physiology

The mechanism of stabilizing the GFR based on the tendency of smooth muscle to contract when stretched is known as ________.

A. tubuloglomerular feedback B. the myogenic mechanism C. the renin-angiotensin-aldosterone mechanism D. renal autoregulation E. sympathetic control

Anatomy & Physiology

The nucleus is surrounded by a(n) ________.

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

Anatomy & Physiology

The rough endoplasmic reticulum

a. is studded with ribosomes. b. synthesizes proteins for export from the cell or for use in construction of a new cellular membrane. c. is continuous with the smooth endoplasmic reticulum. d. is connected to the nucleus. e. all of these answers.

Anatomy & Physiology