Passive membrane transport processes include ________
A) movement of a substance down its concentration gradient
B) movement of water from a low concentration to an area of high concentration
C) movement of a substance up its concentration gradient
D) consumption of ATP
A
Explanation:
B) Water moves from areas of low solute concentration to areas of high solute concentration.
C) When substances move up their concentration gradients, the cell provides energy; this is active transport.
D) Whenever a cell uses ATP, this is active transport. Passive processes do not require ATP.
You might also like to view...
Parathyroid hormone is released by the thyroid gland and causes the small intestine to increase calcium absorption.
Answer the following statement true (T) or false (F)
Cells in the G1 phase of the cell cycle contain half as much DNA as cells in the G2 phase.
Answer the following statement true (T) or false (F)
Unusually large amounts of smooth muscle and a pseudostratified columnar epithelium are pre-sent in which reproductive structure?
a. Prostate gland b. Rete testis c. Seminiferous tubule d. Tunica albuginea e. Vas deferens
The hypophyseal portal system connects the ________ with the ________.
A. anterior pituitary; posterior pituitary B. posterior pituitary; hypothalamus C. pituitary glands; thyroid D. hypothalamus; thyroid E. anterior pituitary; hypothalamus