The process by which molecules such as glucose are moved into cells along their concentration gradient with the help of membrane-bound carrier proteins is called
A) osmosis.
B) facilitated diffusion.
C) active transport.
D) endocytosis.
E) exocytosis.
B
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Water from the alveolar surfaces of the lungs and from the skin surface is lost in what mechanism of heat balance?
A) conduction B) convection C) sensible perspiration D) insensible perspiration
What occurs when the head is in the normal, upright position?
a. Receptor output increases. b. The otoliths are shifted to the side. c. The otoliths push the hair cell processes down. d. Otoliths distort the hair cell processes.
In insects, sperm are able to fertilize the shelled egg through a tunnel called the __________
Fill in the blank with the correct word.
Which of the following is NOT a change typically produced by a hormonal stimulus?
A) induces secretory activity B) alters plasma membrane permeability C) stimulates production of an action potential D) activates or deactivates enzymes