NEETZoologyChemical Coordination and Integration
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Adrenaline and noradrenaline cause an increase in the concentration of glucose in the blood. Reason (R): Catecholamines stimulate glycogenesis and lipogenesis to provide rapid energy during emergency situations. In the light of the above statements, choose the most appropriate answer from the optio
Options
- ABoth (A) and (R) are true and (R) is the correct explanation of (A).
- BBoth (A) and (R) are true but (R) is not the correct explanation of (A).
- C(A) is false but (R) is true.
- D(A) is true but (R) is false.
Correct answer
D. (A) is true but (R) is false.
Step-by-step solution
Assertion (A) is true because adrenaline and noradrenaline (catecholamines) are hyperglycemic hormones that increase blood glucose levels to prepare the body for emergency situations. Reason (R) is false because catecholamines stimulate the breakdown of glycogen (glycogenolysis), lipids (lipolysis), and proteins (proteolysis) to provide immediate energy. They do not stimulate the synthesis of glycogen (glycogenesis) or lipids (lipogenesis). Therefore, (A) is true but (R) is false. Answer: (A) is true but (R) is fal