Question 1

Which of the following best describes the primary physiological defect in Type 2 Diabetes Mellitus?

Accepted Answer

Impaired response to normal insulin levels

Question 2

A patient undergoes an oral glucose tolerance test (OGTT). After 2 hours, their blood glucose is measured at $$12.5$$ mmol/L. According to diagnostic criteria, what is the most likely diagnosis?

Accepted Answer

Diabetes Mellitus

Question 3

Which of the following symptoms is most directly related to the effect of elevated blood glucose on plasma volume in diabetes mellitus?

Accepted Answer

Increased thirst

Question 4

What is the main difference between diabetes mellitus and diabetes insipidus?

Accepted Answer

Diabetes mellitus is characterized by sweet-tasting urine due to glucose, while diabetes insipidus is characterized by tasteless urine due to lack of glucose.

Question 5

If a person has a fasting blood glucose of $$6.2$$ mmol/L, which category do they fall into according to the diagnostic criteria?

Accepted Answer

Impaired fasting glucose (pre-diabetes)

Question 6

Which population group in the United States has the highest prevalence of diabetes according to the provided data?

Accepted Answer

American Indian adults in Arizona

Question 7

Why is diabetes mellitus considered a major public health concern?

Accepted Answer

Its pervasiveness affects all organ systems and leads to multiple complications.

Question 8

Which of the following is a direct consequence of chronic hyperglycemia in diabetes mellitus?

Accepted Answer

Increased risk of vessel disease (vascular complications)

Question 9

A patient presents with polyuria and polydipsia. Laboratory tests reveal blood glucose of $$8.5$$ mmol/L. Which physiological mechanism best explains these symptoms?

Accepted Answer

Glucose acts as an osmotic diuretic, increasing urine output and stimulating thirst.

Question 10

Which of the following best describes the chemical structure of carbohydrates?

Accepted Answer

Composed of carbon, hydrogen, and oxygen in the general formula $$C_n(H_2O)_n$$

Question 11

Which of the following is a correct interpretation of the formula for glucose, $$C_6H_{12}O_6$?

Accepted Answer

Glucose contains 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms.

Question 12

Which of the following is NOT a function of proteins in the human body?

Accepted Answer

Storing genetic information

Question 13

A person with impaired glucose tolerance has a blood glucose level after an OGTT of $$9.5$$ mmol/L. What is their risk status for developing Type 2 Diabetes?

Accepted Answer

High risk; they are considered pre-diabetic

Question 14

Which of the following statements about water in the human body is correct?

Accepted Answer

Water makes up about 60% of the human body and bathes all other molecules, enabling function and adaptation.

Question 15

Which of the following is a correct statement about amino acids?

Accepted Answer

Amino acids are the building blocks of proteins and are linked by peptide bonds.

Question 16

Which of the following is a plausible reason why diabetes mellitus is used as a recurring example in physiology courses?

Accepted Answer

It demonstrates the consequences of disrupted homeostasis across multiple organ systems.

Question 17

Which of the following is the best description of homeostasis?

Accepted Answer

The maintenance of a stable internal environment despite changes in external conditions.

Question 18

A patient with diabetes mellitus is experiencing rapid fluid loss. Which physiological process is most likely responsible?

Accepted Answer

Osmotic diuresis due to high glucose concentration in the urine

Question 19

Which of the following is a key difference between Type 1 and Type 2 Diabetes Mellitus?

Accepted Answer

Type 1 is caused by autoimmune destruction of insulin-producing cells, while Type 2 is primarily due to insulin resistance.

Question 20

Which of the following is the general formula for carbohydrates?

Accepted Answer

$$C_n(H_2O)_n$$

Homeostasis and Diabetes Mellitus: Physiology, Pathophysiology, and Prevalence

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