When Acetylcholine Binds Its Receptor on the Surface of a Muscle

question 45

Multiple Choice

When acetylcholine binds its receptor on the surface of a muscle cell, which of the following happens next?

• A) G protein is activated.
• B) Tyrosine kinase is activated.
• C) Tyrosine is phosphorylated.
• D) A neurotransmitter crosses the synapse.
• E) A sodium gate opens.

---

Definitions:

Nephron Loops

The loop of Henle, a section of the nephron in the kidney that plays a crucial role in the concentration of urine and reabsorption of water and salts.

Cortical Radiate Arteries

Arteries that radiate outward from the arcuate arteries within the kidney's cortex, supplying blood to the nephrons.

Afferent Arterioles

Small blood vessels that carry blood to the nephrons in the kidney, playing a key role in regulating blood pressure and filtration.

Papillary Ducts

Channels in the kidneys through which urine flows from the collecting ducts to the renal pelvis.