1. Which of the following is true about the human circulatory system?
1. The right side of the heart pumps oxygenated blood to the lungs.
2. The left side of the heart pumps deoxygenated blood to the body.
3. Pulmonary veins carry oxygenated blood from the lungs to the heart.
a) 1 and 2 only
b) 1 and 3 only
c) 3 only
d) 1, 2, and 3
2. Regarding the digestive system, consider the following statements:
1. The stomach secretes hydrochloric acid, which helps in digestion.
2. Amylase is an enzyme that digests proteins.
3. The small intestine is the primary site for nutrient absorption.
a) 1 and 2 only
b) 1 and 3 only
c) 2 and 3 only
d) 1, 2, and 3
3. Which of the following is true about human respiration?
1. Oxygen is carried by hemoglobin in red blood cells.
2. The diaphragm contracts during expiration.
3. Gas exchange occurs in the alveoli of the lungs.
a) 1 and 3 only
b) 2 and 3 only
c) 1 only
d) 1, 2, and 3
4. Regarding the nervous system, consider the following:
1. The brainstem controls automatic functions such as breathing and heart rate.
2. The cerebrum is involved in voluntary motor activities.
3. The spinal cord is responsible for complex thinking and memory.
a) 1 and 2 only
b) 1 and 3 only
c) 2 only
d) 1, 2, and 3
5. Which of the following is true about human excretory system?
1. Kidneys filter blood to remove waste and excess water.
2. Urea is produced in the liver as a result of protein metabolism.
3. The ureters connect the kidneys to the bladder.
a) 1 and 2 only
b) 1 and 3 only
c) 2 and 3 only
d) 1, 2, and 3
6. Regarding the endocrine system, consider the following:
1. The thyroid gland secretes insulin, which regulates blood sugar levels.
2. Adrenal glands secrete adrenaline during stress.
3. The pituitary gland is known as the “master gland” because it regulates other glands.
a) 1 and 2 only
b) 2 and 3 only
c) 3 only
d) 1, 2, and 3
7. Which of the following is correct about the immune system?
1. T-cells are involved in cell-mediated immunity.
2. B-cells produce antibodies to neutralize pathogens.
3. The spleen filters blood and removes old red blood cells.
a) 1 and 2 only
b) 1 and 3 only
c) 2 and 3 only
d) 1, 2, and 3
8. Consider the following statements regarding muscle contraction:
1. Actin and myosin are proteins involved in muscle contraction.
2. Calcium ions play a critical role in muscle contraction.
3. ATP is required for the relaxation of muscles after contraction.
a) 1 and 2 only
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2, and 3
9. Regarding the human reproductive system, which of the following are correct?
1. The ovaries release eggs during ovulation.
2. The testes produce sperm in males.
3. The fallopian tubes transport eggs to the uterus.
a) 1 and 2 only
b) 1 and 3 only
c) 2 and 3 only
d) 1, 2, and 3
10. Which of the following is correct about the circulatory and lymphatic systems?
1. Lymph carries white blood cells and filters pathogens.
2. Arteries carry blood away from the heart.
3. Veins carry oxygen-rich blood to the heart.
a) 1 and 2 only
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2, and 3
