Biology - Study Mode

[#231] Which one of following is not a endocrine gland?
Correct Answer

(D) Liver

Explanation

Solution: 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.

[#232] ________ helps the eye to adjust the focal length of the lens.
Correct Answer

(B) Ciliary body

Explanation

Solution: Ciliary muscles help in changing the focal length of the eye lens.

[#233] Eustachian Tube is located in which part of human body?
Correct Answer

(B) Ear

Explanation

Solution: The eustachian tube is a canal that connects the middle ear to the nasopharynx, which consists of the upper throat and the back of the nasal cavity. It controls the pressure within the middle ear, making it equal with the air pressure outside the body.

[#234] Glomerulus and Bowman's capsule constitute
Correct Answer

(D) Malpighian tubule

Explanation

Solution: Glomerulus and Bowman's capsule constitute Malpighian tubule.

[#235] The kidneys are stimulated to produce renin
Correct Answer

(D) By a decrease in the blood pressure

Explanation

Solution: The secretion of renin is stimulated by the following three factors: When a fall in arterial blood pressure is detected by pressure sensitive receptors (baroreceptors) in the arterial vessels. When a decrease in sodium chloride (salt) is detected in the kidney by the macula densa in the juxtaglomerular apparatus.