Consider the following statements about the endocrine system: 1. The pituitary gland is the master gland. 2. Thyroxine regulates basal metabolic rate. 3. Adrenaline decreases heart rate during stress. Which of the above is/are correct? MCQ with Answer and Explanation
Consider the following statements about the endocrine system:
1. The pituitary gland is the master gland.
2. Thyroxine regulates basal metabolic rate.
3. Adrenaline decreases heart rate during stress.
Which of the above is/are correct?
A. 1 and 2 only
B. 1, 2, and 3
C. 1 and 3 only
D. 2 and 3 only
Answer: Option A
Solution (By JKExamLibrary)
The pituitary controls many glands (master gland). Thyroxine from the thyroid increases BMR. Adrenaline increases heart rate during stress, not decreases. So 1 and 2 are correct.
Explanation:
Pernicious anemia is a megaloblastic anemia resulting from vitamin B₁₂ (cobalamin) deficiency, often due to lack of intrinsic factor (produced by stomach parietal cells) needed for its absorption. It is characterized by large, immature red blood cells and neurological symptoms. Iron deficiency causes microcytic anemia. Sickle cell is genetic, aplastic is bone marrow failure.
Explanation:
Red tides are harmful algal blooms caused primarily by the rapid multiplication of certain marine dinoflagellates, such as Gonyaulax. These blooms discolor the water red or brown and release potent toxins (like saxitoxin) that can kill marine life and cause paralytic shellfish poisoning in humans who consume contaminated seafood. Cyanobacteria can cause freshwater blooms, but not marine red tides.
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