Most of the oxygen transported by the blood is A dissolved i

Most of the oxygen transported by the blood is A) dissolved in plasma. B) bound to hemoglobin. C) in ionic form as solute in the plasma. D) bound to the same protein as carbon dioxide. E) carried by white blood cells. Most of the carbon dioxide in the blood is transported as a) solute dissolved in the plasma. B) carbaminohemoglobin. c) bicarbonate ions. D) solute D) solute dissolved in the cytoplasm of red blood cells. E) carbonic acid. Higher brain centers that after the activity of the respiratory centers include all of the following except the A) cerebral cortex. B) medulla oblongata. c) limbic system. D) hypothalamus. E) None of the answers is correct. The most important chemical regulator of respiration is A) Po_2 B) Pco_2 C) bicarbonate ion D) sodium ion. E) hemoglobin Which of the following is are accessory organ of digestion? A) appendix B) pancreas C) spleen D) colon E) esophagus

Solution

Answer:

19). B). Bound to hemoglobin

Hemoglobin, the main oxygen-carrying molecule in red blood cells, carries both oxygen and carbon dioxide. About 7% of oxygen is dissolved in the plasma and about 23% is bound to hemoglobin as carbamino compounds.

20). C). Bicarbonate ions.

Some of the carbon dioxide is transported dissolved in the plasma. Some carbon dioxide is transported as carbaminohemoglobin. However, most carbon dioxideis transported as bicarbonate. As blood flows through the tissues, carbon dioxide diffuses into red blood cells, where it is converted into bicarbonate.

21). A). Cerebral cortex

The cerebral cortex plays a key role in memory, attention, perception, awareness, thought, language, and consciousness.

22). B). Pco₂

The most important chemical regulator of respiration in a healthy individual is carbon dioxide. Respiration involves exchanging oxygen and carbon dioxide between the air and a person\'s blood. When brain receptors perceive too much carbon dioxide in the blood, they signal the body to increase ventilation.

23). B). Pancreas

The salivary glands, liver, gallbladder, and pancreas are not part of the digestive tract, but they have a role in digestive activities and are considered accessory organs.