What Aspect of Circadian Rhythms Might Explain Why We Tend

question 70

Multiple Choice

What aspect of circadian rhythms might explain why we tend to feel so tired at night?

• A) Body temperature bottoms out on Monday mornings.
• B) The three biorhythm patterns converge at low points on Mondays.
• C) Heart rates typically increase at night.
• D) There is an organ in the brain sensitive to light changes, which then affects our sleepiness.
• E) There is more melatonin secreted by the hypothalamus when our circadian rhythm is disrupted.

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Definitions:

Marginal Cost

The increase or decrease in the total cost that arises when the quantity produced is incremented by one unit.

Average Variable Cost

is the cost that varies with the level of output, calculated by dividing the total variable costs by the quantity of output produced.

Diminishing Returns

A rule that asserts when one input in the production process is augmented without changes to the others, there will ultimately be a decline in output after reaching a specific level.

Average Fixed Cost

The cost per unit that remains constant regardless of the level of production or output.