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HCS (Haryana)Prelims2024General Studies
Question
Consider the following statements Which of the following functions is/are influenced by adrenalin? 1. Increase the heart beat 2. More Oxygen supply to muscles 3. Increased supply of blood to the digestive system. 4. Breathing rate declines: How many of the statement given above are correct
Options
- A 1, 2, 3 and 4
- B 1 and 2 only
- C 1, 2 and 3 only
- D 1 only
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Correct Answer
B 1 and 2 only
Model Answer
- Adrenaline, also known as epinephrine, is a hormone and neurotransmitter produced by the adrenal glands. It plays a crucial role in the body's "fight or flight" response to stress.
- Functions of Adrenaline:
Increases Heart Rate
- Adrenaline stimulates the heart to beat faster and with greater force. Hence, statement 1 is correct.
- This increases blood flow to vital organs and muscles, preparing the body for rapid physical action.
Dilates Airways
- It relaxes the smooth muscles in the airways, leading to bronchodilation.
- Enhances oxygen intake and improves respiratory efficiency during stress or physical exertion. Hence, Statement 4 is incorrect.
Boosts Blood Glucose Levels
- Stimulates the liver to break down glycogen into glucose and release it into the bloodstream.
- Provides a quick source of energy to muscles and other tissues. Hence, Statement 2 is correct.
Increases Blood Pressure
- Causes vasoconstriction (narrowing of blood vessels), leading to an increase in blood
- Ensures efficient delivery of oxygen and nutrients to critical areas of the body.
- Enhances Mental Alertness:
- Improves focus, concentration, and reaction time.
- Helps the body respond more effectively to immediate threats or challenges.
Reduces Digestive Activity
- Inhibits digestive processes by diverting blood flow away from the digestive organs. Hence, Statement 3 is incorrect.
- Conserves energy and directs it towards muscles and vital organs needed for a quick response.
Promotes Lipolysis
- Stimulates the breakdown of fat stores into fatty acids and glycerol.
- Provides additional energy sources for muscle activity and other functions.
Regulates Blood Flow
- Alters blood flow distribution by constricting or dilating blood vessels in various parts of the body.
- Prioritizes blood flow to essential areas like the heart and muscles while reducing it to less critical areas.