Question 1

Which of the following statements best describes the role of essential nutrients in human nutrition?

Accepted Answer

Essential nutrients must be provided by the diet because the body cannot synthesize them in sufficient quantities.

Question 2

A patient presents with muscle weakness and confusion after taking diuretics for heart failure. Which mineral imbalance is most likely responsible for these symptoms?

Accepted Answer

Hypokalemia

Question 3

Which of the following best explains why neurons and red blood cells rely almost exclusively on glucose for energy?

Accepted Answer

They have limited ability to utilize fats and require a constant supply of glucose to function.

Question 4

Which process is described by the following equation: $$	ext{Glucose} + 6\,	ext{O}_2 ightarrow 6\,	ext{CO}_2 + 6\,	ext{H}_2	ext{O} + 32\,	ext{ATP}$$?

Accepted Answer

Cellular respiration

Question 5

A person on a very low-carbohydrate diet develops fruity-smelling breath and rapid breathing. Which metabolic process is most likely responsible for these symptoms?

Accepted Answer

Ketogenesis

Question 6

Which of the following is a correct statement about substrate-level phosphorylation?

Accepted Answer

It involves the direct transfer of a phosphate group from a substrate to ADP to form ATP.

Question 7

Which vitamin deficiency is most likely to occur in a patient with chronic fat malabsorption, and why?

Accepted Answer

Vitamin D, because it is fat-soluble and requires lipids for absorption.

Question 8

Which of the following best describes the fate of excess amino acids in the body?

Accepted Answer

They are converted to glucose or fat after deamination.

Question 9

A patient with untreated diabetes mellitus is found to have high blood glucose, metabolic acidosis, and protein wasting. Which of the following best explains the metabolic changes in this patient?

Accepted Answer

Insulin deficiency prevents glucose uptake, leading to increased fat and protein catabolism for energy.

Question 10

Which of the following statements about cholesterol transport is correct?

Accepted Answer

Low-density lipoproteins (LDLs) transport cholesterol from the liver to peripheral tissues.

Question 11

Which hormone is primarily responsible for directing the metabolic events of the fed (absorptive) state?

Accepted Answer

Insulin

Question 12

During prolonged fasting, which metabolic adaptation helps spare glucose for the brain?

Accepted Answer

Increased use of fatty acids and ketone bodies by other tissues

Question 13

Which of the following best describes the process of beta oxidation?

Accepted Answer

Breakdown of fatty acids into two-carbon fragments to form acetyl CoA

Question 14

A patient with a genetic defect in the enzyme phenylalanine hydroxylase will most likely develop which condition if untreated?

Accepted Answer

Phenylketonuria (PKU)

Question 15

Which of the following mechanisms is the primary way the body loses heat at rest?

Accepted Answer

Radiation

Question 16

Which of the following is a direct effect of leptin on hypothalamic neurons?

Accepted Answer

Suppresses release of NPY and decreases appetite

Question 17

Which of the following equations correctly represents the calculation for Body Mass Index (BMI)?

Accepted Answer

$$	ext{BMI} = \frac{	ext{weight (kg)}}{	ext{height (m)}^2}$$

Question 18

Which of the following best explains why restricting dietary cholesterol does not significantly lower blood cholesterol levels?

Accepted Answer

The liver produces cholesterol at a basal rate regardless of dietary intake.

Question 19

Which of the following is a consequence of metabolic syndrome?

Accepted Answer

Increased risk of type 2 diabetes mellitus

Question 20

Which of the following best describes the role of the hypothalamus in thermoregulation?

Accepted Answer

It acts as the body’s thermostat, integrating signals from peripheral and central thermoreceptors.

Chapter 24: Nutrition, Metabolism, and Energy Balance – Study Guide

Guida di studio - Domande di pratica

Study guide - Flashcard