Describe the action of the external oblique
A) contraction expands thoracic cavity, compresses abdominopelvic cavity
B) compresses abdomen, depresses ribs, flexes or bends spine
C) depresses ribs, flexes vertebral column
D) elevates ribs or flex neck
E) extends vertebral column
Answer: B
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Identify the structure found in a fetus that allows blood to flow directly from the pulmonary trunk into the aorta
a) Fossa ovalis b) Foramen ovale c) Trabeculae carneae d) Descending aorta e) Ductus arteriosus
Low levels of calcium within cells are maintained by
A. a high number of voltage-gated and leakage channels for calcium in cell membranes. B. frequent exocytosis and endocytosis of calcium-containing vesicles. C. pumps that move calcium out of cells or into the sarcoplasmic reticulum. D. osmosis of large amounts of water into cells that have any calcium within them.
The most numerous white blood cells are __________.
Fill in the blank(s) with the appropriate word(s).
Marsha gets a splinter in her finger. What is her body's response to any microbe that
might try to enter her body as a result of the splinter breaking the skin? A) Cytotoxic T cell response B) Innate defense C) Specific defense D) Adaptive defense