31. Hair is mainly used for which of the following?
[A] defense
[B] coloration
[C] insulation
[D] sensation
Show Answer
Correct Answer: C [insulation]
Notes:
Hair is mainly used for insulation. The most important function of hair in mammals is that of insulating against the cold by conserving body heat.
32. Which of the following are also called natural killer cells?
[A] Monocytes
[B] Thrombocytes
[C] Lymphocytes
[D] Neutrophils
Show Answer
Correct Answer: C [Lymphocytes]
Notes:
Lymphocytes are also called natural killer cells and play a vital role in producing antibodies. Lymphocytes are of two types – B lymphocytes and T lymphocytes.
33. Where does the stomach receive its blood supply?
[A] Superior mesenteric artery
[B] Inferior mesenteric artery
[C] Gastric artery
[D] Coeliac axis
Show Answer
Correct Answer: D [Coeliac axis]
Notes:
The stomach receives the majority of its blood supply from the Coeliac axis.
34. A hormone that is synthesized from histidine amino acid:
[A] Histamine
[B] Epinephrine
[C] Norepinephrine
[D] Dopamine
Show Answer
Correct Answer: A [Histamine]
Notes:
A hormone that is synthesized from histidine amino acid is Histamine. While Epinephrine, norepinephrine, and dopamine are amine hormones, which are synthesized by modifying the amino acid tyrosine.
35. What is the function of glucagon?
[A] Affects RBC production
[B] Increases heart rate
[C] Lowers blood sugar levels
[D] Raises blood sugar levels
Show Answer
Correct Answer: D [Raises blood sugar levels]
Notes:
Raises blood sugar levels is the function of glucagon.
36. What is the function of the Growth hormone?
[A] stimulates the lining of the uterus for fertilization
[B] stimulates the production and secretion of thyroid hormones
[C] stimulates contraction of uterus
[D] stimulates protein production
Show Answer
Correct Answer: D [stimulates protein production]
Notes:
Stimulates protein production is the function of the Growth hormone. Growth hormone is secreted by the Pituitary gland.
37. Consider the following stages of the menstrual cycle:
- Menstruation
- Follicular phase
- Ovulation
- Luteal phase
Which of the following is the correct order of the menstrual cycle stages?
[A] 1, 2, 3, 4
[B] 2, 1, 3, 4
[C] 1, 2, 4, 3
[D] 2, 3, 1, 4
Show Answer
Correct Answer: A [1, 2, 3, 4]
Notes:
The menstrual cycle comprises four stages in a specified order. It begins with Menstruation (shedding of the uterine lining), followed by the Follicular phase (development of follicles in the ovaries), then Ovulation (release of the egg), and finally the Luteal phase (preparation of the uterine lining for potential pregnancy). This order is crucial for the proper functioning and regulation of the menstrual cycle and hormone levels.
38. Tetanus is caused by which of the following causative agent?
[A] Vibrio cholerae
[B] Corynebacterium diptheriae
[C] Treponema pallidum
[D] Clostridium tetani
Show Answer
Correct Answer: D [Clostridium tetani]
Notes:
Tetanus is caused by Clostridium tetani bacteria. This is a serious disease of the nervous system.
39. Which property is not exhibited by a disease-causing pathogen?
[A] Invasiveness
[B] Toxigenicity
[C] Virulence
[D] Co-operation
Show Answer
Correct Answer: C [Virulence]
Notes:
Cooperation is a property that is not exhibited by pathogens. Whereas The invasion of a pathogen is the ability of a host to gain entry and multiply. A virus is the ability of a pathogen to cause disease. Toxicity is the power of a pathogen to form toxins capable of harming host cells.
40. Which of the following is divalent cations are usually used to make competent cells?
[A] Carbon
[B] Nitrogen
[C] Copper
[D] Calcium
Show Answer
Correct Answer: D [Calcium]
Notes:
Calcium is divalent cations that are usually used to make competent cells.
