Which of the Following Is an Accurate Description of the Effects

question 119

Multiple Choice

 Which of the following is an accurate description of the effects of zeitgebers on the body's internal clocks?

• A) Both the SCN and peripheral clocks are affected more by light than any other type of zeitgeber.
• B) The SCN is more affected by light, whereas the peripheral clocks are more affected by feeding patterns.
• C) The peripheral clocks are more affected by light, whereas the SCN is more affected by physical activity.
• D) Both the SCN and peripheral clocks are affected more by physical activity and feeding patterns than by light.

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Definitions:

Phenotype

Visible attributes or properties of an organism, shaped by the combination of the organism's genetic information and the influence of the environment.

Genotype

The genetic makeup of an organism, consisting of all the DNA and genes that dictate inherited characteristics.

Dominant Gene

A gene that expresses its phenotype even in the presence of its recessive form, thus determining the characteristic it controls.

Phenylketonuria (PKU)

A genetic disorder characterized by the body's inability to metabolize the amino acid phenylalanine, leading to brain and nerve damage if untreated.