DHN 101 FINAL EXAM ACTUAL EXAM QUESTIONS AND ANSWERS PRACTICE
QUESTIONS WITH SOLUTIONS NEWEST | ALREADY GRADED A+
Question 1
Which specific region of the brain serves as the primary control center for regulating hunger,
thirst, and satiety?
A) Cerebellum
B) Hypothalamus
C) Medulla Oblongata
D) Hippocampus
E) Pituitary Gland
Correct Answer: B) Hypothalamus
Rationale: The hypothalamus is the physiological integration center for energy balance. It
receives neural and hormonal signals from the GI tract and adipose tissue to coordinate
feelings of hunger and fullness.
Question 2
During periods of energy deficit or an empty stomach, which hormone is secreted to stimulate
eating behavior and increase appetite?
A) Leptin
B) Insulin
C) Ghrelin
D) Amylin
E) Peptide YY
Correct Answer: C) ghrelin
Rationale: Ghrelin is often called the "hunger hormone." It is produced primarily in the
stomach and signals the hypothalamus to initiate eating behavior when the stomach is
empty.
Question 3
Which hormone is released by the small and large intestines after eating has commenced to
signal the stomach to reduce ghrelin secretion?
A) Glucagon
B) Peptide YY
C) Cortisol
D) Epinephrine
E) Cholecystokinin
Correct Answer: B) peptide YY
Rationale: Peptide YY (PYY) acts as a satiety signal. It is released by the intestines in
response to food intake and works to inhibit hunger by suppressing ghrelin.
Question 4
The pancreas releases which hormone to slow gastric emptying and further reduce the sensation
of hunger during digestion?
, 2
A) Secretin
B) Amylin
C) Thyroxine
D) Aldosterone
E) Gastrin
Correct Answer: B) amylin
Rationale: Amylin is co-secreted with insulin from the pancreatic beta cells. It contributes to
satiety by slowing the rate at which food leaves the stomach (gastric emptying).
Question 5
Adipose (fat) cells secrete which hormone to provide long-term regulation of energy balance by
inhibiting fat storage and reducing hunger?
A) Ghrelin
B) Leptin
C) Estrogen
D) Testosterone
E) Prolactin
Correct Answer: B) leptin
Rationale: Leptin is the "satiety hormone" produced by fat cells. As fat stores increase,
leptin levels rise, signaling the brain to decrease food intake and increase energy
expenditure.
Question 6
Which of the following scenarios would contribute to an INCREASE in an individual's Basal
Metabolic Rate (BMR)?
A) Fasting or starvation
B) Periods of physical growth
C) Sleeping 10 hours a day
D) Loss of muscle mass
E) Aging beyond 30 years
Correct Answer: B) periods of growth
Rationale: BMR increases during times when the body is building new tissue, such as
infancy, puberty, and pregnancy. Other factors include stress, fever, and use of stimulants.
Question 7
Which of the following is a potential medical complication that can occur following bariatric
surgery?
A) Increased risk of lung cancer
B) Intestinal blockage and bleeding
C) Development of Type 1 Diabetes
D) Permanent loss of hearing
, 3
E) Excessive growth of body hair
Correct Answer: B) intestinal blockage and bleeding
Rationale: Bariatric surgery is a major GI procedure. Complications can include surgical
site issues (bleeding/infection), blood clots, and mechanical issues like intestinal blockages.
Question 8
Which psychological factor can significantly influence food choices and, consequently, impact
body composition?
A) Blood type
B) Mood and self-esteem
C) Fingerprint patterns
D) Eye color
E) Hair texture
Correct Answer: B) mood and self-esteem
Rationale: Emotional states and self-perception often drive eating behaviors (e.g., emotional
eating or restricted eating), which directly affects caloric intake and weight management.
Question 9
Genetic factors account for a significant portion of an individual's susceptibility to obesity.
Which of the following is a genetically determined factor?
A) The cost of local produce
B) Metabolic rate
C) Proximity to a gym
D) Personal cooking skills
E) Television viewing habits
Correct Answer: B) metabolic rate
Rationale: While environment matters, genetics influence biological "set points" such as
BMR, hormone production efficiency, and how the body stores fat.
Question 10
Following bariatric surgery, which micronutrient deficiency is most commonly observed due to
malabsorption?
A) Vitamin C
B) Vitamin B-12
C) Sodium
D) Potassium
E) Vitamin E
Correct Answer: B) vitamin B-12
Rationale: Procedures like gastric bypass reduce the production of intrinsic factor in the
stomach, which is essential for the absorption of Vitamin B-12 in the ileum.
, 4
Question 11
Which method of assessing body composition relies on the principle that lean tissue (containing
water/electrolytes) conducts electricity better than fat tissue?
A) Skinfold thickness
B) Hydrostatic weighing
C) Bioelectrical impedance
D) Dual-energy X-ray absorptiometry (DEXA)
E) Air displacement (Bod Pod)
Correct Answer: C) bioelectrical impedance
Rationale: Bioelectrical impedance analysis (BIA) sends a low-level electrical current
through the body. Because fat is a poor conductor compared to muscle, the resistance
(impedance) determines body fat percentage.
Question 12
According to World Health Organization (WHO) and CDC classifications, a person is
categorized as "obese" if their Body Mass Index (BMI) is:
A) 18.5 – 24.9
B) Less than 18.5
C) Greater than or equal to 30
D) Exactly 25
E) 25.0 – 29.9
Correct Answer: C) 30
Rationale: BMI is a screening tool. A BMI of 18.5-24.9 is healthy; 25-29.9 is overweight; and
30 or higher is classified as obesity.
Question 13
How does the weight-loss medication Phentermine function in the body?
A) It prevents the absorption of fat in the gut.
B) It suppresses appetite by affecting neurotransmitters.
C) It increases the number of taste buds.
D) It physically shrinks the stomach.
E) It causes the body to excrete more water.
Correct Answer: B) suppress appetite
Rationale: Phentermine is a sympathomimetic amine (stimulant) that acts on the central
nervous system to reduce feelings of hunger.
Question 14
To prevent significant weight gain, the HHS Physical Activity Guidelines recommend that adults
perform at least how many minutes of moderate-intensity activity per week?
A) 30 minutes
B) 60 minutes
QUESTIONS WITH SOLUTIONS NEWEST | ALREADY GRADED A+
Question 1
Which specific region of the brain serves as the primary control center for regulating hunger,
thirst, and satiety?
A) Cerebellum
B) Hypothalamus
C) Medulla Oblongata
D) Hippocampus
E) Pituitary Gland
Correct Answer: B) Hypothalamus
Rationale: The hypothalamus is the physiological integration center for energy balance. It
receives neural and hormonal signals from the GI tract and adipose tissue to coordinate
feelings of hunger and fullness.
Question 2
During periods of energy deficit or an empty stomach, which hormone is secreted to stimulate
eating behavior and increase appetite?
A) Leptin
B) Insulin
C) Ghrelin
D) Amylin
E) Peptide YY
Correct Answer: C) ghrelin
Rationale: Ghrelin is often called the "hunger hormone." It is produced primarily in the
stomach and signals the hypothalamus to initiate eating behavior when the stomach is
empty.
Question 3
Which hormone is released by the small and large intestines after eating has commenced to
signal the stomach to reduce ghrelin secretion?
A) Glucagon
B) Peptide YY
C) Cortisol
D) Epinephrine
E) Cholecystokinin
Correct Answer: B) peptide YY
Rationale: Peptide YY (PYY) acts as a satiety signal. It is released by the intestines in
response to food intake and works to inhibit hunger by suppressing ghrelin.
Question 4
The pancreas releases which hormone to slow gastric emptying and further reduce the sensation
of hunger during digestion?
, 2
A) Secretin
B) Amylin
C) Thyroxine
D) Aldosterone
E) Gastrin
Correct Answer: B) amylin
Rationale: Amylin is co-secreted with insulin from the pancreatic beta cells. It contributes to
satiety by slowing the rate at which food leaves the stomach (gastric emptying).
Question 5
Adipose (fat) cells secrete which hormone to provide long-term regulation of energy balance by
inhibiting fat storage and reducing hunger?
A) Ghrelin
B) Leptin
C) Estrogen
D) Testosterone
E) Prolactin
Correct Answer: B) leptin
Rationale: Leptin is the "satiety hormone" produced by fat cells. As fat stores increase,
leptin levels rise, signaling the brain to decrease food intake and increase energy
expenditure.
Question 6
Which of the following scenarios would contribute to an INCREASE in an individual's Basal
Metabolic Rate (BMR)?
A) Fasting or starvation
B) Periods of physical growth
C) Sleeping 10 hours a day
D) Loss of muscle mass
E) Aging beyond 30 years
Correct Answer: B) periods of growth
Rationale: BMR increases during times when the body is building new tissue, such as
infancy, puberty, and pregnancy. Other factors include stress, fever, and use of stimulants.
Question 7
Which of the following is a potential medical complication that can occur following bariatric
surgery?
A) Increased risk of lung cancer
B) Intestinal blockage and bleeding
C) Development of Type 1 Diabetes
D) Permanent loss of hearing
, 3
E) Excessive growth of body hair
Correct Answer: B) intestinal blockage and bleeding
Rationale: Bariatric surgery is a major GI procedure. Complications can include surgical
site issues (bleeding/infection), blood clots, and mechanical issues like intestinal blockages.
Question 8
Which psychological factor can significantly influence food choices and, consequently, impact
body composition?
A) Blood type
B) Mood and self-esteem
C) Fingerprint patterns
D) Eye color
E) Hair texture
Correct Answer: B) mood and self-esteem
Rationale: Emotional states and self-perception often drive eating behaviors (e.g., emotional
eating or restricted eating), which directly affects caloric intake and weight management.
Question 9
Genetic factors account for a significant portion of an individual's susceptibility to obesity.
Which of the following is a genetically determined factor?
A) The cost of local produce
B) Metabolic rate
C) Proximity to a gym
D) Personal cooking skills
E) Television viewing habits
Correct Answer: B) metabolic rate
Rationale: While environment matters, genetics influence biological "set points" such as
BMR, hormone production efficiency, and how the body stores fat.
Question 10
Following bariatric surgery, which micronutrient deficiency is most commonly observed due to
malabsorption?
A) Vitamin C
B) Vitamin B-12
C) Sodium
D) Potassium
E) Vitamin E
Correct Answer: B) vitamin B-12
Rationale: Procedures like gastric bypass reduce the production of intrinsic factor in the
stomach, which is essential for the absorption of Vitamin B-12 in the ileum.
, 4
Question 11
Which method of assessing body composition relies on the principle that lean tissue (containing
water/electrolytes) conducts electricity better than fat tissue?
A) Skinfold thickness
B) Hydrostatic weighing
C) Bioelectrical impedance
D) Dual-energy X-ray absorptiometry (DEXA)
E) Air displacement (Bod Pod)
Correct Answer: C) bioelectrical impedance
Rationale: Bioelectrical impedance analysis (BIA) sends a low-level electrical current
through the body. Because fat is a poor conductor compared to muscle, the resistance
(impedance) determines body fat percentage.
Question 12
According to World Health Organization (WHO) and CDC classifications, a person is
categorized as "obese" if their Body Mass Index (BMI) is:
A) 18.5 – 24.9
B) Less than 18.5
C) Greater than or equal to 30
D) Exactly 25
E) 25.0 – 29.9
Correct Answer: C) 30
Rationale: BMI is a screening tool. A BMI of 18.5-24.9 is healthy; 25-29.9 is overweight; and
30 or higher is classified as obesity.
Question 13
How does the weight-loss medication Phentermine function in the body?
A) It prevents the absorption of fat in the gut.
B) It suppresses appetite by affecting neurotransmitters.
C) It increases the number of taste buds.
D) It physically shrinks the stomach.
E) It causes the body to excrete more water.
Correct Answer: B) suppress appetite
Rationale: Phentermine is a sympathomimetic amine (stimulant) that acts on the central
nervous system to reduce feelings of hunger.
Question 14
To prevent significant weight gain, the HHS Physical Activity Guidelines recommend that adults
perform at least how many minutes of moderate-intensity activity per week?
A) 30 minutes
B) 60 minutes
