Which Is an Example That Explains How a Juxtacrine Signal

question 242

Multiple Choice

Which is an example that explains how a juxtacrine signal functions in the human body?

• A) At the junction of two nerve cells, one of the cells secretes a neurotransmitter molecule that diffuses over to the neighboring cell, where it binds and stimulates an electrochemical response.
• B) To signal hunger, cells in the stomach secrete a peptide that circulates through the blood and binds to receptors on cells in the hypothalamus in the brain.
• C) When the skin is injured, chemical signals are sent from nearby blood cells to aid in healing.
• D) T lymphocytes secrete a chemical signal that stimulates those same T lymphocytes to undergo cell division.
• E) A cell in a developing embryo has a cell surface protein that directly contacts a receptor on a neighboring cell, causing it to change its gene expression pattern.

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Definitions:

Synaptogenesis

The process of formation of synapses between neurons in the nervous system, crucial for learning and memory.

Prefrontal

Pertaining to the prefrontal cortex of the brain, involved in complex behaviours including decision making and planning.

Co-sleeping

The practice of sleeping in close proximity to one's child, often in the same bed.

Habituation

The process by which an organism becomes accustomed to a stimulus after repeated exposures, leading to a decrease in response.