31. Classification of reptilia is based on __
[A] Scales
[B] Type of brain
[C] Vaccuties
[D] None of these
Show Answer
Correct Answer: C [Vaccuties
]
Notes:
Classification of reptilia is based on temporal fossa (vaccuties) on their skull. Reptiles are air-breathing, cold-blooded vertebrates with scaly bodies instead of hair or feathers.
32. What is the function of Meissner corpuscles present in the papillary region?
[A] touch sensations
[B] Sensation of warmth
[C] sensation of coolness
[D] pain sensations
Show Answer
Correct Answer: A [touch sensations ]
Notes:
Meissner corpuscles consist of a cutaneous nerve ending responsible for transmitting the sensations of fine, discriminative touch and vibration.
33. The brainstem consists of which of the following
[A] Tectum and Tegmentum
[B] Hypothalamus and Thalamus
[C] Medulla and Pons
[D] None of the above
Show Answer
Correct Answer: A [Tectum and Tegmentum]
Notes:
The brainstem consists of Tectum and Tegmentum. The midbrain tegmentum is the part of the midbrain that extends from the substantia nigra to the cerebral aqueduct. The tectum is the dorsal side of the midbrain.
34. The human alimentary canal runs from the mouth to the anus and is approximately how many meters long?
[A] 4 m
[B] 15 m
[C] 9 m
[D] 1 m
Show Answer
Correct Answer: C [9 m]
Notes:
The human alimentary canal runs from the mouth to the anus and is approximately 9 meters long.
35. What is the precursor of steroid hormone?
[A] Protein
[B] Cholesterol
[C] Carbohydrate
[D] Lipid
Show Answer
Correct Answer: B [Cholesterol]
Notes:
Cholesterol serves as a precursor to steroid hormones. DHEA is a natural steroid hormone synthesized from cholesterol.
36. The opening of the infundibulum into the body cavity is called?
[A] isthmus
[B] ampulla
[C] ostium
[D] thalamus
Show Answer
Correct Answer: C [ostium]
Notes:
The opening of the infundibulum into the body cavity is called the ostium.
37. Syphilis is a bacterial infection usually spread by __
[A] Sexual contact
[B] Wound infection
[C] Air-borne droplets
[D] None of these
Show Answer
Correct Answer: A [Sexual contact]
Notes:
Syphilis is a bacterial infection mostly spread by sexual contact. It is caused by Treponema pallidum bacteria.
38. In winter, at the time of hibernation, Toads maintain breathing through ____:
[A] Lungs
[B] Skin
[C] Both by Skin and Lungs
[D] Buccal cavity
Show Answer
Correct Answer: B [Skin]
Notes:
During hibernation in winter, toads or frogs spend the time tucked away deep in the soil, in the mud underwater or hidden amidst foliage or rotting plants. Outside of times of hibernation, they usually take in oxygen via the air, employing their lungs. However, during hibernation, they receive their necessary oxygen through their permeable skin. This is referred to as cutaneous gas exchange.
39. A man suffering from diabetes mellitus drinks water more frequently as he has to eliminate from the blood extra ____:
[A] Glucose
[B] Insulin
[C] Glucagon
[D] Salt
Show Answer
Correct Answer: A [Glucose]
Notes:
The diabetic person has higher sugar in blood. Glucose is a form of water soluble sugar. Excess blood sugar decreases the elasticity of blood vessels and causes them to narrow, impeding blood flow. This can lead to a reduced supply of blood and oxygen, increasing the risk of high blood pressure and damage to large and small blood vessels.
40. Jaws are absent in ____:
[A] Birds
[B] Fishes
[C] Reptiles
[D] Protochordata
Show Answer
Correct Answer: D [Protochordata]
Notes:
Jaws are absent in protochordata and cyclostomata (Agantho stoma). Protochordata refers to invertabrate subphylum of phylum chordata. It includes animals such as tunicates.
