Chapter 23 homework

Which activity expends the greatest amount of energy per hour? competitive swimming speed walking

competitive swimming

Which primary mechanism of heat transfer is the direct transfer of energy through physical contact? evaporation conduction

conduction

In most tissues, the transport of glucose into the cell is dependent on the presence of a carrier protein that is stimulated by which of the following? lactase pyruvate insulin

insulin

Convection __________. changes a liquid to a vapor is the result of conductive heat loss to the air that overlies the surface of the body

is the result of conductive heat loss to the air that overlies the surface of the body

Which statement regarding long-term regulation of appetite is true? Leptin, a peptide hormone released by adipose tissues as they synthesize triglycerides, stimulates the satiety center. Ghrelin, which is secreted by the gastric mucosa, stimulates appetite.

Leptin, a peptide hormone released by adipose tissues as they synthesize triglycerides, stimulates the satiety center.

What is the definition of metabolism? The breakdown of larger molecules into smaller molecules. The sum of all chemical reactions, both breakdown and build-up reactions.

The sum of all chemical reactions, both breakdown and build-up reactions.

Choose the correct statement regarding glycolysis. There is a net gain of two ATP molecules for each glucose molecule. It is an aerobic process that breaks down a six-carbon glucose molecule into two three-carbon molecules of pyruvate.

There is a net gain of two ATP molecules for each glucose molecule.

Which process describes the synthesis of glucose from noncarbohydrate sources? glycogenolysis glycolysis gluconeogenesis

gluconeogenesis

Which of the following basic food groups provides complete proteins? grains meat, fish, eggs, and legumes

meat, fish, eggs, and legumes

Which fat-soluble vitamin is essential for liver synthesis of prothrombin and other clotting factors? vitamin K vitamin E

vitamin K