Exam 10: Physical Activity- Thermoregulation

Heat loss by conduction transfers heat directly through a liquid, solid, or gas from one molecule to another.

Voiding small volumes of dark yellow urine with a strong odor provides a qualitative indication of inadequate hydration.

Dehydration refers to an imbalance in fluid dynamics when fluid intake does not replenish water loss from either hyperhydrated or normally hydrated states.

Excess __________ has a negative effect on performance in hot environments.

Hormone that increases water reabsorption from the kidney tubules causing urine to become more concentrated.

Wet-bulb temperature is the air temperature in the shade recorded by a mercury thermometer.

The risk of heat illness decreases when a person begins exercising in a dehydrated state.

The endocrine system represents the "workhorse" for temperature regulation.

Not associated with creating a distinct performance disadvantage for athletes who use diuretics to lose body water to rapidly "make weight"?

Serves as the "workhorse" to maintain thermal balance.

The clothing worn by the typical recreational physical activity thwarts the dissipation of heat generated during physical activity to a greater extent than the uniform of American football players.

Fluid loss as little as __________ of body mass increases rectal temperature compared to exercising in the heat without fluid loss.

The use of a cycling helmet is __________ because __________.

Full acclimatization generally occurs within about __________ days of heat exposure.

Which statement is true concerning thermoregulation and gender?

Body heat loss that occurs via electromagnetic heat waves.

From a practical standpoint, __________ exposed to environmental heat stress should exercise at reduced intensity and receive more time to acclimatize than __________.

Research demonstrates that extreme physical activity in a hot environment increases the requirements for all fat-soluble and water-soluble vitamins.

The effectiveness of heat loss by evaporation via air depends on how rapidly air near the body exchanges once it warms.

The hypothalamus.