Saxitoxin (STX) Is the Most Well -Known Paralytic Shellfish Toxin

question 96

Multiple Choice

Saxitoxin (STX) is the most well -known paralytic shellfish toxin caused by the phenomenon known as "red tide." Which statement below best describes why this neurotoxin causes paralysis?

• A) It acts by blocking voltage -gated sodium channels which are needed to generate an action potential.
• B) It acts on the hypothalamus of the brain, shutting down all neurological functions.
• C) It prevents the synaptic vesicles from migrating to the axon terminal; therefore, no action potentials are generated.
• D) It blocks ligand -gated channels on the postsynaptic membrane, which blocks signals leaving the central nervous system.
• E) It acts on the potassium channels within a neuron, hyperpolarizing the cell membrane; therefore, no action potential can be generated.

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Definitions:

ADL

Refers to Activities of Daily Living, which are routine activities people do every day without assistance, such as eating, bathing, dressing, toileting.

Self-sufficiency

The ability of an individual or community to meet their needs without external assistance, including producing food, goods, and services required for living.

Assisted Living

A residential option for seniors who need help with some daily activities like bathing, dressing, and medication management.

ADLs

Activities of Daily Living, which are routine activities people do every day without assistance, such as eating, bathing, dressing, and moving around.