What is the final electron acceptor in mitochondrial metabolism?

What is the approximate energy efficiency of the human body (i.e., % of ATP production from substrate that enters the metabolic pathways)?

The final signal for satiety is the release of ______, which can be stimulated by activation of ______ neurons.

More recent research on the effect of police on crime rates, which carefully tries to separate out cause and effect, has suggested that more police means less crime.

Unemployed individuals who are receiving unemployment insurance benefits must actively search for work to continue to be eligible for them.

What is the greatest contributor to osmolality of the interstitial fluid?

Sweat that drips off of the body contributes to body heat dissipation when core body temperature is elevated.

What organ is leptin released from?

Cholecystokinin (CCK) stimulates hunger.

Which substance(s) provide protection for the skin against ultraviolet radiation?