Which of the Following Are Common Means by Which Binding

question 373

Multiple Choice

Which of the following are common means by which binding of an extracellular chemical messenger with a cell's receptor brings about a desired intracellular response?

• A)opening or closing of specific channels to regulate ionic movement across the plasma membrane
• B)activation of an extracellular second messenger system
• C) alteration of DNA structure by attaching to the nucleus
• D) combination with surface receptor

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Definitions:

Tetralogy of Fallot

A congenital heart defect that involves four anatomical abnormalities of the heart.

Ventricular Septal Defect

A congenital heart defect characterized by an opening in the septum separating the heart's two lower chambers, allowing blood to pass from the left to the right ventricle.

Pulmonic Stenosis

A congenital heart defect characterized by the narrowing of the pulmonary valve, impeding blood flow from the right ventricle to the pulmonary artery.

Caloric Density

The amount of calories contained in a specified amount of food, indicating how energy-dense that food is.