Question 1

Since diuretics and beta-blockers are so effective in lowering blood pressure, these pharmacologic
approaches are often the best choice of treatment for moderate hypertension in endurance athletes.

Accepted Answer

Endurance athletes may experience negative side effects from diuretics and beta-blockers, such as decreased performance due to altered fluid balance and reduced heart rate, respectively. Alternative treatments that do not compromise athletic performance are often considered.

Question 2

The three factors that contribute to heat injuries are increased core temperature, loss of body fluids,
and loss of electrolytes.

Accepted Answer

These three factors directly contribute to heat injuries by affecting the body's ability to regulate temperature, leading to conditions such as heat exhaustion and heat stroke.

Question 3

An appropriate amount of carbohydrate in solution may maintain body temperatures as effectively as
water and may enhance endurance performance, as well.

Accepted Answer

Carbohydrates in solution can help maintain body temperatures by providing energy for metabolism, which in turn generates heat. Additionally, they can enhance endurance performance by supplying a readily available energy source, thus potentially improving exercise efficiency and duration.

Question 4

All individuals will experience a decrease in blood pressure from an aerobic exercise program.

Accepted Answer

While aerobic exercise can lead to a decrease in blood pressure in many individuals, especially those with high or elevated blood pressure, the response can vary based on individual health conditions, genetics, and the intensity and duration of the exercise program. Some individuals may not experience significant changes in blood pressure.

Question 5

Young children are at a greater risk of developing a heat injury than adults.

Accepted Answer

The answer of Young children are at a greater risk...

Question 6

An electrolyte deficiency could impair physical performance; therefore, supplements, above normal
electrolyte nutrition enhance performance.

Accepted Answer

While electrolyte deficiency can impair physical performance, simply consuming electrolytes above normal nutritional levels does not necessarily enhance performance and can sometimes be harmful. Proper balance is key.

Question 7

Individuals who are sodium-sensitive experience an increase in blood pressure, possibly because
of a defect in sodium excretion by the kidney. Sodium accumulates in the body and holds fluids, particularly in the blood, thereby raising blood pressure.

Accepted Answer

Sodium-sensitive individuals have a tendency to retain sodium due to a possible defect in the kidney's ability to excrete sodium. This retention causes the body to hold onto fluids, increasing the volume of blood, which in turn raises blood pressure.

Question 8

Two important determinants of blood pressure are the volume of blood in circulation and the
resistance to blood flow.

Accepted Answer

Blood pressure is determined by the amount of blood pumped by the heart and the resistance to blood flow in the arteries. The volume of blood in circulation affects how much blood the heart pumps, and the resistance to blood flow is influenced by the diameter of the arteries.

Question 9

Higher intensity exercise increases blood flow to the intestines, which will in all probability increase
absorption.

Accepted Answer

Higher intensity exercise actually decreases blood flow to the intestines, as blood is redirected to the muscles and skin, potentially reducing absorption.

Question 10

Heat stroke or exertional heat stroke is the most dangerous heat injury.

Accepted Answer

Heat stroke, including exertional heat stroke, is considered the most severe form of heat injury and can be life-threatening if not promptly and properly treated. It occurs when the body's temperature regulation fails due to prolonged exposure to high temperatures or physical exertion in hot conditions, leading to a body temperature of 104°F (40°C) or higher.

Question 11

If an athlete weighs several pounds less from one morning to the next, it is likely that fluid
replenishment has been deficient.

Accepted Answer

Rapid weight loss over a short period, such as overnight, is typically due to fluid loss rather than fat loss, indicating possible dehydration or insufficient fluid replenishment.

Question 12

Glycerol supplementation is considered safe for diabetic athletes.

Accepted Answer

The answer of Glycerol supplementation is considered safe for diabetic...

Question 13

During times of excessive stress, when circulation is attempting to regulate both body temperature and
blood pressure, control of blood pressure is impaired since body temperature regulation becomes a priority.

Accepted Answer

The answer of During times of excessive stress, when circulation...

Question 14

Individuals who have experienced previous heat injury may have lost the ability for the circulatory
system to adjust to the heat stress, possibly because temperature-regulating centers in the brain have been irreversibly damaged.

Accepted Answer

Previous heat injuries can damage the body's thermoregulatory centers in the brain, impairing the circulatory system's ability to adjust to heat stress in the future.

Question 15

Magnesium supplementation has been shown to lower blood pressure.

Accepted Answer

The answer of Magnesium supplementation has been shown to lower...

Question 16

If one has been following a schedule of physical training, there should be no deterioration of exercise
performance when hot temperatures arrive, even by an unacclimatized individual.

Accepted Answer

Acclimatization to heat is a critical factor in maintaining exercise performance in hot conditions. Without acclimatization, an individual is likely to experience a decrease in performance due to factors like increased core temperature and dehydration.

Question 17

When you are exercising in the heat and sweating, the concentration of electrolytes in the blood and
other body fluids actually decreases.

Accepted Answer

The answer of When you are exercising in the heat...

Quiz 9: Water, Electrolytes and Temperature Regulation

Since diuretics and beta-blockers are so effective in lowering blood pressure, these pharmacologic approaches are often the best choice of treatment for moderate hypertension in endurance athletes.

The three factors that contribute to heat injuries are increased core temperature, loss of body fluids, and loss of electrolytes.

An appropriate amount of carbohydrate in solution may maintain body temperatures as effectively as water and may enhance endurance performance, as well.

All individuals will experience a decrease in blood pressure from an aerobic exercise program.

Young children are at a greater risk of developing a heat injury than adults.

An electrolyte deficiency could impair physical performance; therefore, supplements, above normal electrolyte nutrition enhance performance.

Individuals who are sodium-sensitive experience an increase in blood pressure, possibly because of a defect in sodium excretion by the kidney. Sodium accumulates in the body and holds fluids, particularly in the blood, thereby raising blood pressure.

Two important determinants of blood pressure are the volume of blood in circulation and the resistance to blood flow.

Higher intensity exercise increases blood flow to the intestines, which will in all probability increase absorption.

Heat stroke or exertional heat stroke is the most dangerous heat injury.

If an athlete weighs several pounds less from one morning to the next, it is likely that fluid replenishment has been deficient.

Glycerol supplementation is considered safe for diabetic athletes.

During times of excessive stress, when circulation is attempting to regulate both body temperature and blood pressure, control of blood pressure is impaired since body temperature regulation becomes a priority.

Individuals who have experienced previous heat injury may have lost the ability for the circulatory system to adjust to the heat stress, possibly because temperature-regulating centers in the brain have been irreversibly damaged.

Magnesium supplementation has been shown to lower blood pressure.

If one has been following a schedule of physical training, there should be no deterioration of exercise performance when hot temperatures arrive, even by an unacclimatized individual.

When you are exercising in the heat and sweating, the concentration of electrolytes in the blood and other body fluids actually decreases.