How Does the Toxin from Clostridium Tetani Produce Its Action

question 59

Multiple Choice

How does the toxin from Clostridium tetani produce its action?

• A) It produces antibodies that attack the neuromuscular junctions in skeletal muscle and prevent them from relaxing.
• B) It fuses irreversibly to neuronal cytoplasmic membranes, blocking release of acetylcholine at synaptic clefts.
• C) The smaller polypeptide of its toxin can block the release of inhibitory neurotransmitters by inhibitory neurons in the central nervous system, causing simultaneous contraction of both muscles in an antagonistic pair.
• D) It destroys tissues, including muscle and fat.
• E) It is a pyrogenic toxin, which triggers a diffused rash and, later, sloughing of skin.

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Definitions:

Intercept Term

A reworded definition; represents the constant value in a linear model that shows the outcome's expected value when all predictors equal zero.

Interaction Term

In regression analysis, it's a variable created from the product of two or more variables to assess how the simultaneous influence of those variables on the outcome differs from the sum of their individual effects.

Dependent Variable

The variable in an experiment that is expected to change as a result of changes made to the independent variable.

First-Order Polynomial Model

A mathematical model of a linear relationship between the independent variable and the dependent variable, characterized by having no exponents higher than one.