Biology
Assertion (A): The hormone epinephrine is secreted by the Adrenal cortex when a person is under stress (physical or emotional), fearful or angry.
Reason (R): This hormone prepares the body to meet any emergency situation, i.e. to face the danger or flee from a situation.
- Both A and R are true.
- Both A and R are false.
- A is true and R is false.
- A is false and R is true.
Endocrine System
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Answer
A is false and R is true.
Explanation — Adrenal Medulla secretes adrenaline or epinephrine hormone, when a person is under severe stress (physical or emotional), fearful or angry. This hormone provides extra energy and strength to the body in any adverse (or emergency) situation.
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Related Questions
Assertion (A): Endocrine glands pour their secretions directly into the blood in very large quantities.
Reason (R): Hormones are utilized in very large quantities continuously throughout the body as these secretions regulate the growth and development as well as many other metabolic activities of the body.
- Both A and R are true.
- Both A and R are false.
- A is true and R is false.
- A is false and R is true.
Assertion (A): Thyroxine is the hormone which regulates basal metabolism of the body and speeds up the rate of most activities of the body.
Reason (R): Its undersecretion is harmful which can cause different types of ailments but its oversecretion is very important as it increases the metobolic rate of the body.
- Both A and R are true.
- Both A and R are false.
- A is true and R is false.
- A is false and R is true.
Assertion (A): Oversecretion of insulin causes diabetes mellitus.
Reason (R): Insulin converts glycogen to glucose which increases blood sugar.
- Both A and R are true.
- Both A and R are false.
- A is true and R is false.
- A is false and R is true.
Match the items in Column A with those in Column B.
Column A Column B Cretinism Pituitary Gland Diabetes Mellitus Abnormal development of infant Increased metabolic rate Oversecretion of thyroxine Simple goitre Insufficient iodine in food Growth hormone Insufficient insulin in blood