Ionotropic Nicotinic Acetylcholine Receptors Are Known to Excite Cells Based

question 52

Multiple Choice

Ionotropic nicotinic acetylcholine receptors are known to excite cells based on the flux of sodium ions into the cell cytoplasm when these channels are activated near resting membrane potential. However, how can the calcium flux through these receptors lead to an inhibitory influence?

• A) Calcium flux through nicotinic receptors can act back on the nicotinic receptor to inhibit it.
• B) Calcium flux through nicotinic receptors directly depolarizes the cell.
• C) Calcium flux through nicotinic receptors directly hyperpolarizes the cell.
• D) Calcium flux through nicotinic receptors can activate a calcium-activated potassium channel whose potassium flux hyperpolarizes the cell.
• E) Calcium flux through nicotinic receptors can activate a calcium-activated potassium channel whose potassium flux depolarizes the cell.

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Definitions:

Portrait

An artistic representation of a person in which the face and its expression is predominant, intended to display the likeness, personality, and even the mood of the person.

Nefertiti

An ancient Egyptian queen, known for her beauty and as the royal consort of Pharaoh Akhenaten; her iconic bust is one of the most famous pieces of Egyptian art.

Hatshepsut

One of the few female pharaohs of ancient Egypt, who reigned successfully in the early 15th century BCE and expanded Egypt's trade and building projects.

Upper Egypt

The southern portion of Egypt, which stretches from Cairo to Aswan, historically known for its ancient cities and pharaonic sites.