What is the function of the astrocytes in the CNS?
A. repairing damaged neural tissue
B. controlling the intestinal environment
C. Guiding neuron development
D. Maintaining blood- brain barrier
E. All of the above
E. All of the above
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Hemorrhoids are:
A) enlarged anal lymph nodes. B) infected anal sinuses. C) varicosities in rectal/anal veins. D) infected and enlarged anal mucus glands. E) arteriovenous malformations in the anal mucosa.
Which of the following features distinguishes skeletal muscle from smooth muscle?
a. Only smooth muscle contraction is modified by hormones. b. Only smooth muscle takes up Ca2+ from the extracellular fluid. c. Only skeletal muscle is neurogenic. d. Only skeletal muscle has a moderately developed sacroplasmic reticulum. e. Two of these.
Puberty in a female is characterized by
A. increased muscle mass, especially in the hips. B. growth of chest hair. C. adipose tissue deposition in the breasts and around the hips. D. growth of facial hair. E. closure of the uterine tubes.
The figure illustrates the joints and bones of the rib cage. What does "C" represent?
A. costochondral joint B. sternum C. manubrium D. sternal symphyses E. sternocostal synchrondrosis