Thermoregulation: Body Temperature Regulation and Heat Loss Mechanisms

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What is the MET value equivalent to 3.5 ml/kgxmin?

0.5 MET

2 MET

3 MET

1 MET (correct)

In individuals with a high VO 2 max, what is the minimum intensity required to improve VO 2 max?

46% of VO 2R (correct)

50% of VO 2R

40% of VO 2R

30% of VO 2R

What is the primary function of carbohydrates in the body?

To provide energy for smooth muscles

To facilitate membrane transport

To provide structure to cell membranes

To fuel skeletal muscles and brain (correct)

What is the main function of phospholipids in the body?

To act as a structural component of cell membranes Signup and view all the answers

What is the primary function of vitamins in the body?

To participate in chemical reactions that release energy from fuels Signup and view all the answers

What is the most prevalent type of water in the body?

Intracellular water Signup and view all the answers

What is a primary contributor to visceral fat accumulation?

Alcohol consumption Signup and view all the answers

What is the primary goal of training to improve aerobic power?

To overload the circulatory system and stress the oxidative capacities of skeletal muscle Signup and view all the answers

Which of the following is most dependent on fast-twitch fibers determined early in development?

Anaerobic capacity Signup and view all the answers

What is the likely cause of most injuries in training?

Overtraining Signup and view all the answers

What is the principle of 'live high, train low'?

Train at high altitudes, rest at low altitudes Signup and view all the answers

What is the primary function of minerals in the body?

Form inorganic structures in bones and teeth Signup and view all the answers

Which of the following criteria is NOT a characteristic of an essential amino acid?

The compound can be synthesized in the liver Signup and view all the answers

What is the purpose of the Estimated Average Requirements (EARs) in the Dietary Reference Intake?

To set the daily intake of a nutrient that will meet the needs of 50% of people within a defined age group Signup and view all the answers

What is the primary difference between the Recommended Dietary Allowance (RDA) and the Adequate Intake (AI)?

The RDA is set for nutrients with sufficient data, while the AI is set for nutrients with insufficient data Signup and view all the answers

Which of the following is a characteristic of the Tolerable Upper Intake Level (UL)?

The UL is the maximum daily intake of a nutrient that will not cause adverse health effects Signup and view all the answers

What is the purpose of the Acceptable Macronutrient Distribution Ranges (AMDRs)?

To provide ranges of macronutrient intake to reduce the risk of chronic diseases Signup and view all the answers

What is the primary function of the preoptic anterior hypothalamus (POAH) in the human body?

To maintain a relatively constant core temperature around a set point Signup and view all the answers

What is the result of a significant decline in heat acclimation after 7 days of inactivity or no heat exposure?

Complete loss of acclimation Signup and view all the answers

What is the minimal volume of aerobic exercise required for health benefits, according to the current physical activity guidelines?

7.5 MET-hr/week Signup and view all the answers

What is the primary mechanism of heat loss during exercise in high ambient temperature and high relative humidity?

Evaporation Signup and view all the answers

What is the range of intensity associated with improvements in cardiorespiratory fitness?

40-89% of heart rate reserve or oxygen uptake reserve Signup and view all the answers

What is the result of cold acclimation on skin temperature?

Lower skin temperature at which shivering begins Signup and view all the answers

What is the primary function of eccrine sweat glands?

To regulate body temperature Signup and view all the answers

What is the range of frequency associated with improvements in cardiorespiratory fitness?

3-5 days/week Signup and view all the answers

What is the result of heat acclimation on sweat rate?

Earlier onset of sweating and higher sweat rate Signup and view all the answers

What is the primary function of apoeccrine sweat glands?

Located in few body regions, limiting effectiveness Signup and view all the answers

What is the recommended rate of increase in intensity or duration of strength training exercises per week?

≤10% Signup and view all the answers

What is the primary energy source for short, high-intensity work intervals of 5 to 10 seconds?

ATP-PC system Signup and view all the answers

What is the primary factor influencing performance that is affected by factors such as diet and energy production?

CNS function Signup and view all the answers

What is the primary site of fatigue during high-intensity exercises?

Periphery Signup and view all the answers

What is the order of muscle fiber recruitment during aerobic activities of progressively greater intensity?

Type 1, type 2a, type 2x Signup and view all the answers

What is the primary factor limiting maximum running performance for distances of 1500 m to 5 km?

CV system Signup and view all the answers