What is the function of the sebaceous gland?
To secrete cerumen, or earwax
To produce hair growth
To produce sebum or oil
To excrete perspiration, or sweat
Correct Answer : C
Sebaceous glands are microscopic glands in the skin that secrete an oily or waxy substance called sebum into the hair follicles or onto the skin surface.
Sebum lubricates and protects the skin and hair from drying out and from infections caused by bacteria or fungi. Sebum also contributes to body odour.
A. To secrete cerumen or earwax. This statement is wrong because cerumen is produced by specialized sweat glands in the ear canal, not by sebaceous glands. B. To produce hair growth.
This statement is wrong because hair growth is determined by the activity of hair follicles, not by sebaceous glands. Sebaceous glands only deposit sebum on the hairs and bring it to the skin's surface.
D. To excrete perspiration or sweat.
This statement is wrong because perspiration is produced by sweat glands, not by sebaceous glands. Sweat glands are different from sebaceous glands in their structure, location and function. Sweat glands help regulate body temperature and eliminate waste products through the skin.
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Related Questions
Correct Answer is D
Explanation
Testosterone is an androgen, a type of sex hormone responsible for developing male characteristics, such as pubic and axillary hair, deepening of the voice, growth of the penis, and sperm production. Testosterone is produced by the testes in males and the ovaries and adrenal glands in females.
Choice A is wrong because oxytocin is a hormone that stimulates uterine contractions during labor and milk ejection during breastfeeding.
It does not affect hair growth at puberty.
Choice B is wrong because progesterone is a hormone that prepares the endometrium for implantation and maintains pregnancy.
It does not affect hair growth at puberty.
Choice C is wrong because prolactin is a hormone that stimulates milk production in the mammary glands.
It does not affect hair growth at puberty.
Correct Answer is D
Explanation
Connective tissue is the most abundant type of tissue in the human body. It is widely distributed and varied, and it includes fibrous tissues, fat, cartilage, bone, bone marrow, and blood.
Choice A is wrong because muscle tissue is not the most abundant type of tissue in the human body. It constitutes around 40% of total body weight and has around 700 muscles.
Choice B is wrong because nervous tissue is not the most abundant type of tissue in the human body. It consists of neurons and neuroglia that transmit and process information.
Choice C is wrong because epithelial tissue is not the most abundant type of tissue in the human body. It covers the body and many of its parts, and forms glands.
Correct Answer is B
Explanation
The left lung lies superior to the diaphragm and left of the mediastinum, which is the space between the lungs that contains the heart and other structures. The left lung is also smaller than the right lung because of the cardiac notch, which accommodates the heart.
Choice A is wrong because the spleen is an abdominal organ that lies inferior to the diaphragm and left of the stomach.
Choice C is wrong because the stomach is also an abdominal organ that lies inferior to the diaphragm and left of the spleen.
Choice D is wrong because the left kidney is another abdominal organ that lies inferior to the diaphragm and posterior to the spleen.
Correct Answer is B
Explanation
Carotid artery.
The carotid artery is a major blood vessel that supplies blood to the head and neck. It can be felt as a pulse on either side of the neck, just below the jawline.
Choice A is wrong because the subclavian artery is located below the clavicle (collarbone) and cannot be felt as a pulse on the neck.
Choice C is wrong because the brachiocephalic artery is a large vessel that branches into the right subclavian and right carotid arteries. It is located deep in the chest and cannot be felt as a pulse on the neck.
Choice D is wrong because the basilar artery is a vessel that forms at the base of the brain from the union of the two vertebral arteries. It cannot be felt as a pulse on the neck.
The normal range for pulse rate in adults is 60 to 100 beats per minute.
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