Extremely stressful physical activity in young females can result in excessive bone mass due to large amounts of estrogen production
Indicate whether the statement is true or false
FALSE
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People who work in factories that package buttered popcorn can develop a disorder
caused by inhaling organic dust. This disorder is called A) extrinsic allergic alveolitis. B) asbestosis. C) emphysema D) berylliosis
The tip region of the photoreceptor cells are removed by cells of the retinal pigment epithelium by ________.
A. phagocytosis B. opsin C. apoptosis D. the bleaching reaction
Facilitated diffusion and active transport differ in that
A) potential energy is required for active transport but not for facilitated diffusion. B) ATP is necessary for active transport, but not for facilitated diffusion. C) facilitated diffusion moves water across the cell membrane, whereas active transport does not. D) facilitated diffusion uses a substrate to bind to a protein carrier, whereas active transport does not. E) facilitated diffusion uses cell membrane proteins to move substances, whereas active transport does not.
The brain has a ________ (high or low?) demand for oxygen, and receives about ________% of the total blood volume in circulation.
A) high; 15 B) high; 50 C) high; 35 D) low; 35 E) low; 15