Lacrimal glands are responsible for secreting-

Correct Answer: C

Rationale: The correct answer is C: Tears. Lacrimal glands are responsible for producing tears, which help keep the eyes moist and protect them from irritants. Tears contain water, electrolytes, proteins, and enzymes. Sebum (A) is produced by sebaceous glands to lubricate the skin and hair. Cerumin (B) is produced by ceruminous glands in the ear canal to protect the ear from debris. Mucous (D) is produced by mucous membranes to protect and lubricate various tissues in the body. Therefore, the correct answer is tears as lacrimal glands specifically produce this fluid to maintain eye health.

Correct Answer: B

Rationale: The correct answer is B: Cold climate. Bears have thick hairy skin to provide insulation and warmth in cold climates. This helps them regulate body temperature and survive in harsh winter conditions. Option A is incorrect because thick hairy skin is not specifically for protection from danger. Option C is incorrect as hot climates typically require thinner fur for heat dissipation. Option D is incorrect because bears do not live in hot climates, so it's not applicable to all conditions.

Correct Answer: A

Rationale: The correct answer is A because "goose-flesh" or goosebumps occur when the arrector pili muscles contract, causing hairs to stand upright. This physiological response is triggered by various factors like cold temperatures or emotions. Choice B is incorrect as it describes whiskers on a rabbit's upper lip. Choice C is incorrect as sebum is related to skin oil production, not goose-flesh. Choice D is incorrect as it refers to uncooked pork meat, which is unrelated to the physiological mechanism of goose-flesh.

Correct Answer: C

Rationale: The correct answer is C: Skin. In mammals, maximum energy is lost through the skin in the form of heat. This is due to the process of thermoregulation, where excess body heat is released through the skin to maintain a stable internal temperature. Respiration (choice A) is essential for energy production, urine (choice B) primarily eliminates waste products, and stool (choice D) is the result of undigested food. Skin, on the other hand, plays a crucial role in regulating body temperature and dissipating excess energy in the form of heat, making it the primary route for energy loss in mammals.

Correct Answer: C

Rationale: Certainly! The correct answer is C: Perspiration. Copious sweat secretion is the body's way of regulating temperature through evaporative cooling. Blubber (A) refers to a layer of fat in marine mammals. Pelage (B) refers to an animal's fur or hair. Goose flesh (D) is the raised bumps on the skin due to cold or emotional stress. Perspiration is the specific term for the secretion of sweat by sweat glands for thermoregulation, making it the correct choice in this context.