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Basal Metabolic Rate and Heat Production Quiz

8 Questions

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Basal Metabolic Rate and Heat Production Quiz

Created by

@StainlessCosecant

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Questions and Answers

What is the primary role of basal metabolic rate (BMR)?

Energy required to maintain bodily functions at rest (correct)

Energy stored in fat tissues

Energy consumption during exercise

Energy used for digestion and absorption

Which of the following factors is known to decrease basal metabolic rate (BMR)?

High testosterone levels

Increased muscle mass

Thyroxine levels

Malnutrition (correct)

Which hormones are known to increase the metabolic rate?

Insulin and cortisol

Growth hormone, testosterone, and thyroxine (correct)

Serotonin and dopamine

Epinephrine and norepinephrine

How much energy released by ATP hydrolysis is converted into heat?

About one-third Signup and view all the answers

Which temperature range is considered normal for a healthy person at rest?

97 to 99.5°F Signup and view all the answers

What effect does sleep generally have on basal metabolic rate (BMR)?

Decreases BMR Signup and view all the answers

What physical factors contribute to heat production in the body?

Friction at microscopic levels and blood flow Signup and view all the answers

Which group typically has a lower basal metabolic rate (BMR)?

Females and older individuals Signup and view all the answers

Study Notes

Basal Metabolic Rate (BMR)

Minimum energy required for survival at complete rest.
Influenced by factors such as:
- Muscle mass: More muscle mass requires more energy.
- Hormones: Growth hormone, testosterone, and thyroxine increase BMR.
- Fever: Increases BMR.
- Sleep: Decreases BMR.
- Malnutrition: Decreases BMR due to the body becoming more "efficient" in energy use.
- Sex and age: Females and older individuals generally have lower BMRs, influenced by factors like muscle mass and adipose tissue differences and sex hormone variations.

Heat Production in the Body

Approximately one-third of energy released from ATP hydrolysis is converted to heat.
Microscopic friction also generates heat through:
- Blood flow.
- Movement within the musculoskeletal system.

Oral Temperature Ranges

Resting: 97 to 99.5°F (approximately).
Exercise: 101 to 104°F (approximately).
Cold: (Temperature range not specified)

Rectal Temperature

Rectal temperature is typically higher than oral temperature.

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Description

Test your knowledge on Basal Metabolic Rate (BMR) and how various factors such as muscle mass, hormones, and age affect energy usage at rest. Additionally, explore how heat production occurs in the body through ATP hydrolysis and microscopic friction. This quiz covers essential concepts relevant to human physiology and energy metabolism.