Which of the following statements concerning development of the integumentary system is true?
A. The epidermis is derived from mesoderm.
B. The melanocytes are derived from ectoderm.
C. Nails, hair, and glands develop from the dermis.
D. Sensory receptors in the skin are derived from the epidermis.
E. Collagen fibers do not appear until after birth.
B
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If the concentration of sodium chloride in the interstitial fluid surrounding cells decreases and the concentration of other solutes remains constant,
A) the cells will shrink. B) the cells will swell. C) the fluid outside of the cells will become isotonic. D) the fluid outside of the cells will become hypertonic. E) the cells will not change.
Increased aldosterone causes increased ________.
A. reabsorption of H+ B. filtrate formation C. K+ secretion D. urine volume E. Na+ secretion
Which of the following influence the range of motion of a joint?
A. The amount of fluid in and around the joint B. The amount and shape of cartilage at the joint C. The strength and location of tendons and ligaments D. The shape of the articular surfaces of the bones E. All of these influence range of motion.
Which of the following muscles is attached to the malleous?
a. tensor tympani b. malleolus c. lympanic d. staedious