31. What is the function of systemic circulation?
[A] oxygenated blood is pumped from the heart to every organ
[B] carrying deoxygenated blood away from the heart
[C] oxygenated blood is supplied to the heart
[D] None of the above
Show Answer
Correct Answer: A [oxygenated blood is pumped from the heart to every organ]
Notes:
Systemic circulation is another part of the circulation where oxygenated blood is pumped from the heart to every organ and tissue in the body, and deoxygenated blood returns to the heart again.
32. A hormone, which is released by the posterior pituitary:
[A] Oxytocin
[B] TSH
[C] ICSH
[D] Prolactin
Show Answer
Correct Answer: A [Oxytocin]
Notes:
A hormone, which is released by the posterior pituitary is Oxytocin. The posterior pituitary does not synthesize hormones, but it is able to store and release the two hormones.
33. What is the scrotal ligament?
[A] an accessory reproductive gland in male mammals
[B] elastic tissue which connects the cauda epididymis to the scrotal sac
[C] remnant of gubernaculum in a fetus
[D] None of these
Show Answer
Correct Answer: C [remnant of gubernaculum in a fetus]
Notes:
A scrotal ligament is the remnant of the gubernaculum in a fetus. It secures the testis to the most inferior portion of the scrotum.
34. Which of the following does not affect health?
[A] Genetic disorders
[B] Infections
[C] LifeStyle
[D] Health Insurance
Show Answer
Correct Answer: D [Health Insurance]
Notes:
Genetic disorders, Infections, and LifeStyle always affect health. Whereas Health Insurance is a type of insurance that covers medical expenses caused by an illness.
35. Which is the best example of incomplete dominance?
[A] Wavy hair
[B] Sickle cell anemia
[C] Tay Sachs disease
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Wavy hair, Sickle cell anemia, and Tay Sachs disease are the best example of incomplete dominance.
36. Which legumes have a symbiotic relationship with two nitrogen-fixing bacteria?
[A] Crotalaria juncea
[B] Sesbania aculeata
[C] Sesbania rostrata
[D] Cyamopsis tetragonoloba
Show Answer
Correct Answer: C [Sesbania rostrata]
Notes:
Sesbania rostrata legumes have a symbiotic relationship with two nitrogen-fixing bacteria.
37. An example of abiotic stress is __
[A] pest
[B] insect
[C] drought
[D] vectors
Show Answer
Correct Answer: C [drought]
Notes:
An example of abiotic stress is drought. The negative effect of non-living factors on living organisms in a specific environment is known as abiotic stress.
38. Lungs are the primary organs of ____:
[A] Digestion
[B] Respiration
[C] Constipation
[D] Perspiration
Show Answer
Correct Answer: B [Respiration]
Notes:
The lungs are the primary organs of respiration in humans and many other animals including a few fish and some snails. Their function in the respiratory system is to extract oxygen from the atmosphere and transfer it into the bloodstream, and to release carbon dioxide from the bloodstream into the atmosphere, in a process of gas exchange.
39. Which of the following is known as animal starch?
[A] Glycogen
[B] Cellulose
[C] Chitin
[D] Glucose
Show Answer
Correct Answer: A [Glycogen]
Notes:
Glycogen, the principal storage form of glucose in animal cells, sometimes called “animal starch” for its resemblance with starch found in plants. It is stored in liver and muscle cells and can be converted to glucose if needed. In the liver this conversion is regulated by the hormone glucagon.
40. The bark of willow tree is a source of which medicine?
[A] Paracetamol
[B] Aspirin
[C] Antiseptic
[D] Antacid
Show Answer
Correct Answer: B [Aspirin]
Notes:
The bark of the common Willow tree is the source of a wide range of phenolic glycosides, of which the most important is salicin. Salicin is metabolized into salicylic acid in the human body, and is a precursor of aspirin. It is used as a fever reducer, a mild pain reliever, and an anti-inflammatory.
