Marathon Runner Flashcard 2

Front

What is a feedback mechanism?

Back

A feedback mechanism is a biological process that helps maintain homeostasis by regulating physiological functions in response to changes in the environment or internal conditions.

Front

What is the role of insulin in the body?

Back

Insulin is a hormone produced by the pancreas that lowers blood sugar levels by facilitating the uptake of glucose into cells.

Front

What is the role of glucagon in the body?

Back

Glucagon is a hormone produced by the pancreas that raises blood sugar levels by promoting the conversion of stored glycogen into glucose.

Front

What organ produces insulin?

Back

The pancreas produces insulin.

Front

What molecule do cells use to perform work?

Back

Cells use ATP (adenosine triphosphate) to perform work such as muscle contraction.

Front

How does the body respond to high blood sugar levels?

Back

The body responds to high blood sugar levels by increasing insulin secretion from the pancreas, which helps lower blood sugar.

Front

What is homeostasis?

Back

Homeostasis is the process by which biological systems maintain stability while adjusting to changing external conditions.

Front

What is the significance of ATP in cellular processes?

Back

ATP is the primary energy carrier in cells, providing the energy needed for various biochemical reactions.

Front

What happens to blood vessels when body temperature rises?

Back

When body temperature rises, some blood vessels dilate (increase in size) to help dissipate heat.

Front

What is the function of sweat glands in thermoregulation?

Back

Sweat glands excrete sweat to cool the body through evaporation, helping to lower body temperature.