Hormones in Animals (Endocrine Glands)Practice Questions & MCQs
Practice Hormones in Animals (Endocrine Glands) questions from Control and Coordination (Class 10 Science) - important MCQs with answers and step-by-step solutions. Solve the sample questions below, then practice the full set free on the RankByte app.
Hormones in Animals (Endocrine Glands)Quiz - Solve & Score
Q1. Which hormone is secreted into the blood when a person is suddenly frightened or in danger, preparing the body for 'fight or flight'?
- A.Adrenaline
- B.Insulin
- C.Thyroxine
- D.Growth hormone
Answer: A. Adrenaline
Q2. When the hormone adrenaline is secreted into the blood in a frightening situation, which two changes occur in the body?
- A.Increased heart rate and increased blood pressure
- B.Decreased heart rate and decreased blood pressure
- C.Increased appetite and increased thirst
- D.Slower breathing and deep sleep
Answer: A. Increased heart rate and increased blood pressure
Q3. Consider the following statements about hormones in animals: (I) The pituitary is the master gland. (II) Iodine deficiency causes goitre. (III) Insulin is secreted by the adrenal gland. Which of the above statement(s) is/are correct?
- A.Only I and II
- B.Only I
- C.Only III
- D.None of these
Answer: A. Only I and II
To see why, recall that Insulin is secreted by beta-cells of pancreas islets; it lowers blood glucose by promoting uptake into liver / muscle: glucose -> glycogen; deficiency -> diabetes mellitus (high blood sugar) => the stem matches this; hence the answer = Only I and II. That fits the listed correct option directly - Correct. Looking at the others: option B) 'Only I' is wrong because Re-check each statement individually; option C) 'Only III' doesn't hold - Re-check each statement individually. Hence the answer is A) Only I and II.
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