Mucus occurs in both the respiratory and digestive tracts. What is its main immunological function?
A) sweeping away debris
B) physically trapping pathogens
C) destruction of pathogens because it is acidic
D) increasing oxygen absorption
B
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How do cells use the ATP cycle shown in the figure?
A) Cells use the cycle to recycle ADP and phosphate. B) Cells use the cycle to recycle energy released by ATP hydrolysis. C) Cells use the cycle to recycle ADP, phosphate, and the energy released by ATP hydrolysis. D) Cells use the cycle to generate or consume water molecules as needed. E) Cells use the cycle primarily to generate heat.
A line transect would probably be the preferred method to quantify the population density of ______.
A. birds B. lions C. fishes D. trees E. butterflies
You are scheduled to give a seminar to your fellow med school students, and have chosen to speak about the pituitary. What important points will you include? (Check all that apply.)
_____ The posterior pituitary is derived from the brain, while the anterior pituitary is not. _____ The anterior pituitary is derived from the brain, while the posterior pituitary is not. _____ The pituitary is a compound endocrine gland. _____ Each half of the pituitary secretes one important hormone. _____ Some pituitary hormones have sex-specific effects. _____ If there is too little iodine in the diet, the pituitary can grow into a goiter. _____ The pituitary is responsible for producing at least nine major hormones.
One critical requirement for life to arise on Earth was time for:a
the atmospheric temperature to increase sufficiently. b. molecules to accumulate and react with one another. c. the Earth's various climates to stabilize. d. the salinity of the oceans to stabilize. e. the ozone layer to form, so that the level of ultraviolet radiation was reduced.