Fertilization of an ovum occurs in which anatomical structure?.
Cervix.
Fallopian tubes.
Ovaries.
Horn of the uterus.
Correct Answer : B
Fallopian tubes. Fertilization of an ovum usually takes place in the uterine tube, also known as the fallopian tube. This is the structure that transports the ovum from the ovary to the uterus.
Choice A is wrong because the cervix is the lower part of the uterus that connects to the vagina. It does not receive or transport the ovum.
Choice C is wrong because the ovaries are the organs that produce and release the ova. They do not host the fertilization process.
Choice D is wrong because the horn of the uterus is the point where the uterine tube joins the uterus. It is not the site of fertilization.
The normal range of temperature for human body is 36.5–37.5 °C (97.7–99.5 °F).
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Related Questions
Correct Answer is D
Explanation
Hemoglobin is a protein in red blood cells that carries oxygen to the cells.
Some possible explanations for the other choices are:
Choice A. Mitochondria. Mitochondria are organelles that produce ATP using the energy in food.They do not carry oxygen to the cells, but they use oxygen to perform cellular respiration.
Choice B. DNA. DNA is a molecule that stores genetic information in the nucleus of the cell.It does not carry oxygen to the cells, but it codes for the synthesis of proteins, including hemoglobin.
Choice C. Aorta. Aorta is a large artery that carries oxygenated blood from the heart to the rest of the body.It does not carry oxygen to the cells directly, but it transports blood that contains hemoglobin and oxygen.
Correct Answer is D
Explanation
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.
Correct Answer is C
Explanation
The esophagus is located in the thoracic cavity, which is the space between the lungs and the chest wall. The thoracic cavity also contains the heart, aorta, trachea, thymus gland, bronchial tubes, and many lymph nodes.
Choice A is wrong because the ventral cavity is a general term for the body cavity that includes the thoracic and abdominal cavities.
Choice B is wrong because the abdominal cavity is the space below the diaphragm that contains the stomach, small and large intestines, spleen, pancreas, liver, and gallbladder.
Choice D is wrong because the dorsal cavity is another general term for the body cavity that includes the cranial and spinal cavities.
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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