31. How many layers are present in the human eye?
[A] Three
[B] Four
[C] Two
[D] Nine
Show Answer
Correct Answer: A [Three]
Notes:
The eye has three main layers. These are Fibrous coat or Sclera, Vascular coat or Uveal tract, and Nervous coat or Retina.
32. Which of the following is the lens of the eye?
[A] Concave
[B] Convex
[C] Biconcave
[D] Biconvex
Show Answer
Correct Answer: D [Biconvex]
Notes:
The lens of the eye is a biconvex, relatively acellular, optically transparent intraocular structure. It serves to transmit light to the retina with the least amount of light scattering along with the cornea.
33. The persistence of vision for the human eye is __
[A] 1/6th of a second
[B] 1/10th of a second
[C] 1/16th of a second
[D] 1/18th of a second
Show Answer
Correct Answer: C [1/16th of a second]
Notes:
The persistence of vision for the human eye is 1/16th of a second. The process of seeing begins when light rays from the objects you see pass through the cornea, the clear, dome-like structure that covers your eyes.
34. Which systems protect our body against disease-causing microbes?
[A] Immune system
[B] Digestive system
[C] Excretory system
[D] Respiratory system
Show Answer
Correct Answer: A [Immune system]
Notes:
The immune system protects our body against disease-causing microbes. The main parts of the immune system are white blood cells, antibodies, complement system, lymphatic system, spleen, thymus, and bone marrow.
35. Which of the following is located at the junction with the bladder composed of smooth involuntary muscle?
[A] Urethra
[B] Internal Urethral sphincters
[C] External Urethral Sphincters
[D] Bladder
Show Answer
Correct Answer: B [Internal Urethral sphincters]
Notes:
The internal urethral sphincter is a muscle that constricts the internal urethral orifice. It is made up of smooth muscle so it is involuntary.
36. The human urinary bladder can hold up to ___ml of urine
[A] 400 ml
[B] 600 ml
[C] 800 ml
[D] 1000 ml
Show Answer
Correct Answer: A [400 ml]
Notes:
A healthy human bladder can hold between 400 and 500 milliliters of urine or about 2 cups before reaching capacity.
37. The membrane investing the ovum just outside the membrane granulosa is __.
[A] theca interna
[B] discus proligerus
[C] zona pellucida
[D] vitelline membrane
Show Answer
Correct Answer: A [theca interna]
Notes:
Theca Interna cells express receptors for luteinizing hormone (LH) to produce androstenedione.
38. Whooping cough is caused by which of the following causative agent?
[A] Pasteurella pestis
[B] Clostridium tetani
[C] Bordetella pertussis
[D] Human papillomavirus
Show Answer
Correct Answer: C [Bordetella pertussis]
Notes:
Whooping cough is caused by Bordetella pertussis causative agent. It is a Gram-negative, aerobic, pathogenic, and encapsulated coccobacillus of the genus Bordetella.
39. Which of the following is not a symptom of Anthrax?
[A] Rapid Breathing
[B] Low body temperature
[C] Discharge from nostrils
[D] Rapid heartbeat
Show Answer
Correct Answer: B [Low body temperature]
Notes:
Symptoms of Anthrax are:
1. Rapid Breathing
2. Discharge from nostrils
3. Rapid heartbeat
40. Which of the following is known as the “Father of Genetics”?
[A] Morgan
[B] Mendel
[C] Watson
[D] Bateson
Show Answer
Correct Answer: B [Mendel]
Notes:
Mendel is known as the “Father of Genetics”.
