The hormone that opposes the action of insulin and increases blood glucose levels is: MCQ with Answer and Explanation

Question

Share Report Error

The hormone that opposes the action of insulin and increases blood glucose levels is:

A. Glucagon

B. Thyroxine

C. Cortisol

D. Growth hormone

Answer: Option A

Solution (By JKSSB Mock Tests)

Glucagon, from the pancreatic alpha cells, raises blood glucose by stimulating glycogenolysis and gluconeogenesis in the liver. Cortisol and growth hormone also raise blood glucose but glucagon is the primary direct antagonist of insulin. Thyroxine increases metabolic rate. The balance between insulin (hypoglycemic) and glucagon (hyperglycemic) maintains glucose homeostasis.

This question belongs to: Science Biology

Request complete Subject PDF

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Biology Questions

Question #1

Share Report

Consider the following statements about photosynthesis:
1. C3 plants fix CO₂ directly in the Calvin cycle.
2. C4 plants have Kranz anatomy.
3. Photorespiration is higher in C4 plants.
Which of the above is/are correct?

A. 1, 2, and 3

B. 1 and 3 only

C. 2 and 3 only

D. 1 and 2 only

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option D

Explanation:
C3 plants use Calvin cycle directly; C4 plants have Kranz anatomy and a CO₂-concentrating mechanism. Photorespiration is negligible in C4 plants, higher in C3. Thus, 3 is incorrect.

This question belongs to: Science Biology

Question #2

Share Report

The disease caused by the deficiency of iodine is:

A. Anemia

B. Scurvy

C. Rickets

D. Goiter

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option D

Explanation:
Iodine deficiency leads to insufficient thyroid hormone production, causing TSH hypersecretion and thyroid gland enlargement (goiter). Anemia is iron/B₁₂/folate deficiency, rickets vitamin D, scurvy vitamin C.

This question belongs to: Science Biology

Question #3

Share Report

Which organelle is primarily responsible for the detoxification of lipid-soluble drugs and toxins in liver cells?

A. Golgi Apparatus

B. Rough Endoplasmic Reticulum

C. Lysosome

D. Smooth Endoplasmic Reticulum

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option D

Explanation:
The Smooth Endoplasmic Reticulum (SER) in liver hepatocytes contains enzymes like cytochrome P450 that detoxify lipid-soluble drugs, metabolic waste, and toxins by making them water-soluble for excretion. Rough ER is involved in protein synthesis, the Golgi apparatus in packaging and secretion, and lysosomes in intracellular digestion. Exam tip: SER is abundant in liver and adrenal cortex cells.

This question belongs to: Science Biology

Explore All Biology MCQs