Refer to the Figure Shown

question 69

Multiple Choice

Refer to the figure shown.
What is the structure labeled by arrow I in the diagram?

• A) Na⁺ channel
• B) Aquaporin
• C) K⁺ channel
• D) Ca²⁺ channel

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Definitions:

Vitamin E

A group of eight fat-soluble compounds that include four tocopherols and four tocotrienols, known for its antioxidant properties.

Oculomotor Nerves

Cranial nerves involved in eye movements, responsible for controlling most of the eye's movements, along with the constriction of the pupil and maintaining an open eyelid.

Eyelid

A thin fold of skin that covers and protects the human eye.

Progressive Bulbar Palsy

A neurological disease that affects the brain stem's nerve cells, leading to difficulties in speaking, swallowing, and sometimes breathing.