Which of the following food is NOT safe food for birds to eat?
a. avocado c. banana
b. broccoli d. papaya
A
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Temperature-regulating mechanisms are not 100% effective
Indicate whether the statement is true or false
Which of the following correctly describes water movement across the epithelial cells lining the collecting duct?
A) Water can permeate the lipid bilayer at all times. B) Water can permeate the phospholipid bilayer only in the presence of aldosterone. C) Water can permeate the apical membrane through aquaporin-2 and the basolateral membrane through aquaporin-3, but aquaporin-2 is only present in the presence of ADH. D) Water can permeate the basolateral membrane through aquaporin-2 and the apical membrane through aquaporin-3, but aquaporin-2 is only present in the presence of aldosterone. E) Water can permeate the phospholipid bilayer only in the presence of ADH.
The plasma membrane is a selectively permeable barrier
Indicate whether the statement is true or false
Name the type of membrane channel that opens in response to touch, pressure, vibration, or tissue stretching and is found in the auditory receptors of the ear, and in touch and pressure receptors in the skin
a) leakage channel b) ligand-gated channels c) mechanically gated channels d) voltage-gated channels e) temperature-sensitive channel