(a) Write the names of five endocrine glands found in the human body. Name the hormones secreted by each gland.(b) How do hormones reach the organs they control?(c) Name the gland which controls the secretion of hormones from the pituitary.(d) How does our body respond when adrenaline is secreted in large amounts into the blood?(e) Name the disease which occurs in adults due to the deficiency of iodine in the diet. What is the main symptom of this disease?

Academic Biology NCERT Class 10

(a) The five endocrine glands found in the human body are:

1. Pituitary gland: secretes growth hormone.

2. Thyroid gland: secretes thyroxine hormone.

3. Parathyroid gland: secretes parathormone.

4. Pancreas: secretes insulin.

5. Adrenal glands: secrete adrenaline.

(b) Hormones reach the organ they control through the blood and act on it.

(c) Hypothalamus regulates the secretion of hormones from the pituitary gland.

(d) When adrenaline is secreted in large amounts into the blood, it increases our heartbeat, breathing rate, blood flow into the muscles and causes the liver to put more stored glucose in our blood. All these actions of adrenaline produce a lot of energy in our body very quickly and enable us to take quick action.

(e) Deficiency of iodine in the diet causes a disease named as goitre. The main symptom of goitre is swelling of the thyroid gland which is present in the neck.

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Updated on: 23-Mar-2023

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