Skin can regenerate effectively even after considerable damage has occurred because
A) the epidermis of the skin has a rich supply of small blood vessels.
B) stem cells persist in both epithelial and connective-tissue components of the skin even after injury.
C) fibroblasts in the dermis can give rise to new germinal cells in the epidermis.
D) contraction in the area of the injury brings cells of adjacent strata together.
E) cells of the stratum basale cannot migrate to other positions in the skin.
Answer: B
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Where are the straight tubules?
a) A b) B c) C d) D e) E
The movements of fluid across the capillary wall depend on all of the following except
a. capillary blood pressure. b. interstitial-fluid hydrostatic pressure. c. plasma protein concentration. d. interstitial-fluid protein concentration. e. concentration of glucose in the capillary.
An educated speculation or a possible answer to a question is called a(n) ________
A) hypothesis B) fact C) scientific method D) law E) theory