The spinal curvature that develops as a child learns to walk shifts the trunk weight over the legs. It is an example of a ________ curve.
A. secondary
B. primary
Answer: A
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Efferent neurons
a. transmit sensory information b. have a motor function. c. transmit messages into the spinal cord. d. none of these answers. e. all of these answers.
Which type of epithelial tissue is found in the urinary bladder?
A. Transitional epithelium B. Simple columnar epithelium C. Stratified squamous epithelium D. Simple cuboidal epithelium E. Pseudostratified ciliated columnar epithelium
Black lung disease is caused specifically by continued exposure to .
A) toxic fumes. B) heavy metals. C) carcinogens. D) inhaled particulate dust.
Circular folds and intestinal villi
A) increase the surface area of the mucosa of the small intestine. B) carry products of digestion that will not pass through the walls of blood capillaries. C) produce new cells for the mucosa of the small intestine. D) secrete digestive enzymes. E) produce hormones.