What is the most abundant type of tissue in the human body?.
Muscle tissue.
Nervous tissue.
Epithelial tissue.
Connective tissue.
Correct Answer : D
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.
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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.
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
Superficial wound healing.
Cellular contact inhibition is important in this process because it prevents cells from migrating and proliferating excessively when the wound is closed. Contact inhibition is a cell property that limits the migration and proliferation of cells in crowded environments.
Choice A is wrong because sweat production does not involve contact inhibition. Sweat glands secrete sweat through ducts that open onto the skin surface.
Choice C is wrong because scoliosis development does not involve contact inhibition. Scoliosis is a condition that causes the spine to curve sideways, and it can be caused by genetic, environmental, or unknown factors.
Choice D is wrong because tyrosinase production does not involve contact inhibition.
Tyrosinase is an enzyme that catalyzes the production of melanin, a pigment that gives color to the skin, hair, and eyes.
Correct Answer is B
Explanation
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