Question 1

Small changes in energy intake over the long term have only a minor effect on body weight.

Accepted Answer

Small changes in energy intake over a long period of time can have a significant impact on body weight. Even a small excess of 10 calories per day would result in a weight gain of around 1 pound per year. Similarly, a small deficit of 10 calories per day would result in a weight loss of around 1 pound per year. Thus, maintaining a small but consistent caloric deficit or surplus can have a noticeable effect on body weight over time.

Question 2

Which of the following is not considered a layer of skin?

Accepted Answer

B

Question 3

Body weight due to accumulation of fat seems to increase throughout life beginning around the age of 30.

Accepted Answer

False

Question 4

Describe a scenario showing how a lack of physical activity exacerbates age-related sarcopenia leading to an increase in body weight.

Accepted Answer

The answer of Describe a scenario showing how a lack...

Question 5

Positive energy balance results in:

Accepted Answer

Positive energy balance means the body is consuming more calories than it is burning. This excess energy is stored as fat, which leads to an increase in fat storage and body weight.

Question 6

The body mass index provides a good estimate of the relationship between fat accumulation and the risk of morbidity and mortality at all ages.

Accepted Answer

BMI does not differentiate between fat and muscle mass, nor does it consider fat distribution, making it an imperfect measure for assessing the health risks associated with fat accumulation across all age groups.

Question 7

The loss of muscle mass due to physical inactivity will lead to a decrease in ______,further exacerbating the age-related decrease in total energy expenditure and accumulation of fat.

Accepted Answer

Resting energy expenditure (REE) is the amount of energy needed to maintain basic bodily functions at rest. Muscle is a metabolically active tissue that contributes to REE, so the loss of muscle mass due to physical inactivity will lead to a decrease in REE, making it harder to maintain energy balance and more likely to accumulate fat. The other options (A, C, D) are not directly related to the impact of muscle loss on energy expenditure.

Question 8

A decrease in food intake paralleling the end-of-life decline in body weight can lead to a clinical condition known as:

Accepted Answer

Anorexia of aging refers to the decreased appetite and food intake that often occur in older adults, contributing to weight loss and nutritional deficiencies. This condition is recognized as a significant health issue in the geriatric population.

Question 9

Which of the following macronutrients has the highest energy content in kilojoules/gram?

Accepted Answer

Fat has 9 kilojoules/gram, while protein and carbohydrates have 4 kilojoules/gram and alcohol has 7 kilojoules/gram. Therefore, fat has the highest energy content per gram.

Question 10

Which layer of the skin has blood vessels?

Accepted Answer

The answer of Which layer of the skin has blood...

Question 11

Muscles that require a high speed of contraction,such as those in the hands and other areas of fine motor control,tend to be affected to a greater degree by sarcopenia than the large muscle groups with slower speeds of contraction.

Accepted Answer

This statement is true. Fine motor control muscles tend to be affected more by sarcopenia because they require a higher speed of contraction. Larger muscle groups with slower speeds of contraction may be affected as well, but to a lesser degree.

Question 12

The body composition of individuals over the age of 30 reflects the gain and loss of both protein and fat stores.

Accepted Answer

The answer of The body composition of individuals over the...

Question 13

Most evidence suggests that for people over 70 years of age,a decrease in voluntary physical activity has a greater impact on weight gain than does an increased intake of kilojoules.

Accepted Answer

Studies have shown that a decrease in physical activity is a major contributor to weight gain in older adults, even if their calorie intake remains the same. This is due to age-related muscle loss and a decreased metabolic rate.

Question 14

A joule is the amount of energy required to heat 1 gram of water 1 degree centigrade.

Accepted Answer

A joule is the SI unit of energy, defined as the amount of work done when a force of one newton is applied over a distance of one meter. Heating water involves calories or specific heat capacity, not directly joules in the definition provided.

Question 15

______ is a multifactorial syndrome that often indicates the end of life;it includes impaired physical function,malnutrition,depression,and cognitive impairment.

Accepted Answer

Geriatric failure to thrive involves a combination of factors including physical decline, malnutrition, depression, and cognitive impairment. Anorexia of aging and geriatric anorexia are terms used to describe age-related declines in appetite and food intake, but they may not capture the multifactorial nature of geriatric failure to thrive. Syndrome X is a term used to describe a cluster of risk factors for cardiovascular disease, such as insulin resistance, high blood pressure, and obesity, and is not related to geriatric failure to thrive.

Question 16

______ calorimetry is the calculation of energy expenditure from the measurement of respiratory gases.

Accepted Answer

The answer of ______ calorimetry is the calculation of energy...

Question 17

A calorie is the amount of energy required to heat 1 gram of water 1 degree centigrade.

Accepted Answer

This statement is true. A calorie is defined as the amount of energy needed to raise the temperature of 1 gram of water by 1 degree Celsius.

Question 18

Which of the following contributes the most kilojoules to total energy expenditure?

Accepted Answer

Resting energy expenditure, also known as basal metabolic rate, contributes the most kilojoules (or calories) to total energy expenditure. This is the energy required for basic bodily functions such as breathing, circulating blood, and maintaining body temperature. Physical activity and diet-induced thermogenesis also contribute to energy expenditure, but not as significantly as resting energy expenditure.

Question 19

Write the equation for total energy expenditure (TEE).

Accepted Answer

The answer of Write the equation for total energy expenditure...

Question 20

Which of the following is not a major constituent of body composition?

Accepted Answer

While carbohydrates are important for energy production and other bodily functions, they are not considered a major constituent of body composition. The major constituents are water, protein, and lipid.

Quiz 8: The Physiology of Human Aging