From what else, besides physical trauma, does the skin provide protection?
What will be an ideal response?
UV radiation and "...harmful chemicals, toxins, microbes, and excessive heat or cold."
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Cytotoxic T cells destroy their target cells by releasing perforin, which cuts holes in
A) lysosomes. B) cell membranes. C) ribosomes. D) DNA molecules.
Excretion
a. is the removal of substances that were filtered at the glomerulus or secreted but not reabsorbed. b. is the process by which a substance moves from the peritubular capillary blood to the tubular fluid. c. conserves substances that are important to the body. d. occurs by active transport of substances into the urinary bladder. e. is controlled by sympathetic activity.
Heart murmurs may be caused by ________. This causes valves to be less compliant, creating difficulty for blood to move from one chamber to another.
A. septal defects B. fibrillation C. stenosis D. regurgitation
The dermis is derived from mesoderm, but prior to the formation of the components of the dermis the mesoderm layer forms a connective tissue layer called ________.
Fill in the blank(s) with the appropriate word(s).