Which Statement Is TRUE of Gated Ion Channels

question 2

Multiple Choice

Which statement is TRUE of gated ion channels?

• A) Each channel can allow 10 million ions per second through the membrane.
• B) The gating mechanism involves piston-like movement of the transmembrane helices.
• C) Each channel lets both positive and negative ions flow through the pore.
• D) Closing of the gate requires phosphorylation of the channel protein.
• E) Gated channels only respond to intracellular ligands.

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Definitions:

Bowman's Capsule

A sac resembling a cup located at the start of the nephron’s tubular part in the kidney, which carries out the initial process of filtering blood to produce urine.

Capillaries

The smallest blood vessels in the body that connect arteries and veins, facilitating the exchange of water, oxygen, carbon dioxide, and many other nutrients and waste substances between blood and the tissues of the body.

Bowman's Capsule

A part of the nephron in the kidney that encloses the glomerulus and where blood filtration begins.

Renal Corpuscle

A component of the nephron in the kidney responsible for the filtration of blood to form urine.