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.
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.
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