Figure 41-2 ​ ​

question 12

Multiple Choice

Figure 41-2 ​

​
The accompanying figure represents a sequence of events occurring in the neuronal membrane (designated by the numbers 1 and 2) . The letter "I" indicates an ion. What event is mostly likely being portrayed in this figure?

• A) Activation of voltage-gated sodium channels
• B) Activation of voltage-gated potassium channels
• C) Activation of voltage-gated chloride channels
• D) Activation of sodium-chloride pumps
• E) Activation of sodium-potassium pumps

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Definitions:

Ureters

Tubes that carry urine from the kidneys to the urinary bladder.

Pressure Gradient

A pressure gradient is the physical quantity representing the difference in pressure between two points, causing fluid flow from the region of higher to lower pressure.

Plasma Clearance

A measure of the rate at which a substance is removed from the blood by the kidneys or other organs.

Plasma Osmolarity

The concentration of solutes in the blood plasma, important for the regulation of water balance and blood pressure.