Practice MCQ Questions and answers on Biology-GK

Answer: Option A

When the pituitary gland produces excess growth hormones the result is excessive growth, called acromegaly. The excessive growth occurs first in the hands and feet, as soft tissue begins to swell.

Answer: Option B

Gastrine is not a gland.

Answer: Option A

Oxytocin is produced in the hypothalamus and is secreted into the bloodstream by the posterior pituitary gland. Secretion depends on electrical activity of neurons in the hypothalamus – it is released into the blood when these cells are excited.

Answer: Option A

Enlargment of thyroid gland takes place due to deficiency of iodine.

Answer: Option D

Endocrine glands are the ductless glands that secrete their products into bloodstream from where they are carried to the target organs. Pancreas, testes and thymus are endocrine glands as they secrete hormones. Pancreas secrete insulin and glucagon, testes secrete testosterone and thymus secrete thymosin hormone. Liver is not an endocrine gland instead, it is a digestive organ which secretes bile juice which is necessary for emulsification of fats.