Exam 16: Energy Balance and Temperature Regulation

The core temperature is maintained at a fairly constant level, but skin temperature is quite variable.

Weight loss occurs when the energy derived from the food consumed is less than the energy expended by the body.

Body temperature is normally maintained at an elevated level during sustained exercise.

Describe the physiological changes that occur during heat stroke.

Leptin stimulates the release of melanocortins.

The most important factor influencing heat transfer by radiation is the relative humidity of the atmosphere.

____________________ refers to a state of collapse resulting from reduced blood pressure brought about as a consequence of overtaxing the heat loss mechanisms.

Hyperthermia refers to all imbalances between heat gain and heat loss that increase body temperature.

Among the several kinds of biologically important molecules, ____________________ store the most energy per gram.

Match the heat exchange terms labelled a. through d. with their descriptions. -transfer of heat by air or water currents

Which of these statements applies to core temperature

A young woman consumes 1200 mL of O₂ during a six-minute, basal metabolic rate test period.What is her estimated basal metabolic rate

A decrease of insulin in the blood may signal satiety.

Upon exposure to heat, skin vasodilation occurs, which increases the temperature gradient between the skin and environment, thus promoting heat loss.

On average, about half the body heat that is lost is due to which of these factors

Upon exposure to cold, which of these conditions does NOT occur

Profuse sweating occurs during heat stroke as the body's temperature climbs rapidly.

The most important factor determining the extent of evaporation of sweat is the ____________________ of the air.

What is the major means of increasing heat production in response to a cold environmental temperature

Metabolic rate equals energy expenditure/unit of time.