PERTUKARAN O2 DAN CO2 DI JARINGAN TUBUH

Summary

The process of oxygen transport in the body begins when oxygen binds to hemoglobin in red blood cells. As blood travels further from the lungs, oxygen pressure decreases due to diffusion into body tissues. Carbon dioxide is also diffused from tissues into the bloodstream, with about 75% of it being dissolved in plasma and forming bicarbonate ions. In the lungs, bicarbonate ions are converted back to carbon dioxide, which is then expelled. The remaining 25% of carbon dioxide binds to hemoglobin, forming carbaminohemoglobin, which releases the gas in the lungs for diffusion into the alveoli.

Takeaways

• 😀 Oxygen binds with hemoglobin in the blood and is transported to body tissues.
• 😀 As blood travels further from the lungs, the oxygen pressure decreases.
• 😀 Oxygen diffuses into body tissues as blood moves through the circulatory system.
• 😀 Alongside oxygen, carbon dioxide also diffuses from tissues into the blood.
• 😀 Around 75% of carbon dioxide dissolves in blood plasma before continuing through the bloodstream.
• 😀 Carbon dioxide dissolves in plasma by bonding with water to form bicarbonate ions.
• 😀 When blood reaches the lungs, bicarbonate ions are converted back into carbon dioxide and water.
• 😀 25% of carbon dioxide is bound to hemoglobin, forming carbaminohemoglobin.
• 😀 In the lungs, carbaminohemoglobin releases carbon dioxide for diffusion into the alveolus.
• 😀 The entire process highlights the essential roles of hemoglobin in oxygen and carbon dioxide transport.

Q & A

What happens to oxygen once it binds with hemoglobin?

Once oxygen binds with hemoglobin, it is carried by the bloodstream to various tissues throughout the body, where it is needed for cellular respiration.

How does the oxygen pressure change as blood moves further from the lungs?

As blood travels further from the lungs, the oxygen pressure decreases because oxygen is being diffused into the tissues for use.

What happens to carbon dioxide during the journey of blood from the tissues to the lungs?

As blood moves from the tissues to the lungs, carbon dioxide diffuses from the tissues into the bloodstream, and then is transported back to the lungs for exhalation.

How much of the carbon dioxide is dissolved in the blood plasma?

About 75% of carbon dioxide is dissolved in the blood plasma before being transported back to the lungs.

What happens to the rest of the carbon dioxide not dissolved in plasma?

The remaining 25% of carbon dioxide binds to hemoglobin, forming carbaminohemoglobin.

What is carbaminohemoglobin, and how is it formed?

Carbaminohemoglobin is formed when carbon dioxide binds to hemoglobin in the blood. This occurs in about 25% of carbon dioxide transport.

How does carbon dioxide release from carbaminohemoglobin in the lungs?

In the lungs, the carbon dioxide that is bound to hemoglobin in carbaminohemoglobin is released, and it diffuses into the alveoli.

What is the role of hemoglobin in the transport of oxygen and carbon dioxide?

Hemoglobin binds to oxygen for transport to tissues and also helps in transporting carbon dioxide, either by dissolving it in plasma or binding it to form carbaminohemoglobin.

What process allows oxygen to be diffused from blood into tissues?

Oxygen diffuses from the blood into the tissues through a process driven by differences in oxygen pressure, with higher oxygen concentrations in the blood and lower concentrations in the tissues.

How is carbon dioxide converted back into its gaseous form in the lungs?

In the lungs, bicarbonate ions, which were formed by the combination of carbon dioxide and water in the blood, are converted back into carbon dioxide and water. The carbon dioxide is then diffused into the alveoli for exhalation.