Question 1

Which gland is often referred to as the 'Master Gland' of the human endocrine system?

Accepted Answer

Pituitary. The pituitary gland is called the master gland because it regulates the activity of several other endocrine glands. It is a small, pea-sized structure located at the base of the brain. Despite its small size, it produces hormones that control growth and reproduction.

Question 2

Which hormone is primarily responsible for the 'fight or flight' response during stressful situations?

Accepted Answer

Adrenaline. Adrenaline is secreted by the adrenal glands to prepare the body for sudden physical action. It increases heart rate and blood flow to the muscles for immediate energy. This hormone is also known as epinephrine in many medical contexts.

Question 3

A deficiency of which mineral in the diet can lead to the swelling of the thyroid gland, known as Goitre?

Accepted Answer

Iodine. Iodine is an essential component for the synthesis of thyroid hormones by the thyroid gland. Without sufficient iodine, the gland enlarges in an attempt to capture more of the mineral. Salt is often fortified with iodine to prevent this nutritional deficiency.

Question 4

Which hormone regulates the sleep-wake cycle and is produced by the Pineal gland?

Accepted Answer

Melatonin. Melatonin secretion increases in the evening to signal to the body that it is time for sleep. Its production is influenced by the amount of light entering the eyes. The pineal gland is a tiny organ located deep in the brain's center.

Question 5

Insulin and Glucagon, which regulate blood sugar levels, are produced by which organ?

Accepted Answer

Pancreas. The pancreas acts as both an endocrine and exocrine gland in the human body. The endocrine portion consists of the Islets of Langerhans, which secrete these vital hormones. Failure to produce sufficient insulin results in a condition called Diabetes Mellitus.

Endocrine System — Set 1