What is the primary function of hemoglobin?.

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.

Pulmonary vein. This is because the pulmonary vein is the only vessel that carries oxygenated blood from the lungs to the heart. The blood then enters the left atrium of the heart and then the left ventricle.

Choice B. Inferior vena cava is wrong because it carries deoxygenated blood from the lower body to the right atrium of the heart.

Choice C. Aorta is wrong because it carries oxygenated blood from the left ventricle of the heart to the rest of the body.

Choice D. Pulmonary artery is wrong because it carries deoxygenated blood from the right ventricle of the heart to the lungs.

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.

Carry oxygen. Hemoglobin is an iron-containing protein in red blood cells that transports oxygen from the lungs to the tissues and carbon dioxide from the cells to the lungs. Hemoglobin has four heme groups that can bind one oxygen molecule each.

Choice A is wrong because hemoglobin does not produce blood clots. Blood clotting is a process that involves platelets, fibrin and other factors.

Choice B is wrong because hemoglobin does not transport hormones. Hormones are chemical messengers that are carried by the blood plasma or bound to specific carrier proteins.

Choice C is wrong because hemoglobin does not fight infection. Infection is fought by white blood cells and antibodies.