Q: Which equation best represents the relationship between blood volume, blood pressure, and fluid intake?

$$\text{Blood Pressure} \propto \text{Blood Volume}$$

Question 1

Which of the following statements about body fluid compartments is correct?

Accepted Answer

About two-thirds of the body's fluid is found inside the cells as intracellular fluid.

Question 2

Which of the following best describes the role of electrolytes in nerve impulse conduction?

Accepted Answer

The movement of sodium and potassium ions across the cell membrane generates an electrical signal.

Question 3

Which equation best represents the relationship between blood volume, blood pressure, and fluid intake?

Accepted Answer

$$	ext{Blood Pressure} \propto 	ext{Blood Volume}$$

Question 4

A patient is experiencing muscle cramps and irregular heartbeat after excessive sweating during a marathon. Which electrolyte imbalance is most likely responsible?

Accepted Answer

Deficiency of potassium in the intracellular fluid

Question 5

Which of the following is a function of water in the human body?

Accepted Answer

Water dissolves and transports substances, regulates body temperature, and lubricates tissues.

Question 6

Which of the following best explains why water moves from one compartment to another in the body?

Accepted Answer

Water moves by osmosis to areas of higher electrolyte concentration.

Question 7

Which statement about the water content of body tissues is correct?

Accepted Answer

Lean tissue contains about 70% water, while fat tissue contains 10–20% water.

Question 8

A person drinks a large amount of water after strenuous exercise. What is the most likely effect on their body's electrolyte balance?

Accepted Answer

The concentration of electrolytes in the extracellular fluid will decrease, potentially leading to hyponatremia.

Question 9

Which of the following is NOT a function of electrolytes in the body?

Accepted Answer

Providing energy for metabolic reactions

Question 10

Which of the following mechanisms is responsible for the majority of water loss from the body under normal conditions?

Accepted Answer

Urine excretion by the kidneys

Question 11

Which of the following triggers the thirst mechanism in the hypothalamus?

Accepted Answer

Increased concentration of salt and other solutes in the blood

Question 12

Which of the following statements about caffeine is correct?

Accepted Answer

Caffeine has a mild diuretic effect, but moderate consumption does not cause excessive fluid loss in most people.

Question 13

Which of the following foods would contribute the most to daily water intake?

Accepted Answer

Lettuce, iceberg

Question 14

Which of the following best describes the process of osmosis?

Accepted Answer

The movement of water across a membrane to equalize solute concentrations on both sides

Question 15

Which of the following is a correct statement about sodium?

Accepted Answer

Sodium is an essential electrolyte that helps regulate fluid balance and nerve function.

Question 16

Which of the following is a source of metabolic water in the body?

Accepted Answer

Breakdown of carbohydrates, fats, and proteins during metabolism

Question 17

A patient with low blood pressure and reduced blood volume is likely to experience which of the following physiological responses?

Accepted Answer

Increased thirst and release of ADH to promote water retention

Question 18

Which of the following best explains why older adults are at higher risk for dehydration?

Accepted Answer

They lose lean tissue with age, resulting in lower total body water.

Question 19

Which of the following is a function of cerebrospinal fluid?

Accepted Answer

It protects the brain and spinal column.

Question 20

Which of the following best describes the movement of calcium during muscle contraction?

Accepted Answer

Calcium moves into the muscle cell to stimulate contraction, and is pumped back out after contraction.

Fluid and Electrolyte Balance in Human Nutrition

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