Which statement correctly describes the relationship between the epiglottis and glottis during swallowing?
A) the epiglottis covers the glottis
B) the glottis covers the epiglottis
A) the epiglottis covers the glottis
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The selective permeability of a cell membrane is due to ____
a. the hydrophobic core formed by the phospholipid tails b. the hydrophilic end facing the cell exterior c. glycolipids on the surface of the membrane d. the position of cholesterol in the membrane bilayer e. the hydrophilic core formed by the phospholipid tails
One of the main functions of the hypothalamus is to produce ____ hormones, which affect the ____
pituitary.
a. releasing; posterior b. releasing; anterior c. activating; posterior d. amplification; anterior e. suppressing; anterior
If a plasma membrane were compared to a
sandwich, ____ would be considered the filling.
a. cholesterol b. protein c. hydrophilic heads d. hydrophobic tails e. carbohydrates
Before photosynthesis evolved, ________ was rare in Earth's atmosphere
A) O2 B) CO2 C) H2O D) N2 E) air