Why is it important that respiratory surfaces are moist and selectively permeable?

Moist walls - gases dissolve in the moisture helping them to pass across the gas exchange surface. Permeable walls - allow gases to pass through. Extensive blood supply - ensuring oxygen rich blood is taken away from the lungs and carbon dioxide rich blood is taken to the lungs.

1. Why is it important for respiratory surfaces to be moist?
2. Why is it important that the respiratory system is kept moist and warm?
3. Why must respiratory surfaces for gas exchange be thin and moist quizlet?
4. Do respiratory structures have a selectively permeable membrane?
5. What effect does the surface have on a respiratory surface?
6. Why do the alveoli need to be moist?
7. Why is it important for the air that enters the body to be warmed and moistened by the cilia and mucus lining of the nose?
8. Why is it important to maintain the health of the respiratory and circulatory systems?
9. Is it important that respiratory and circulatory systems work together Why?
10. Why is the alveolar surface moist quizlet?
11. What is the respiratory surface where gas exchange occurs quizlet?
12. What are the necessary characteristics for a respiratory surface?
13. What happens when your diaphragm relaxes and moves upward?
14. Why should respiratory surfaces be thin?
15. How substances move from a higher concentration to a lesser concentration?

Why is it important for respiratory surfaces to be moist?

A respiratory surface is covered with thin, moist epithelial cells that allow oxygen and carbon dioxide to exchange. Those gases can only cross cell membranes when they are dissolved in water or an aqueous solution, thus respiratory surfaces must be moist.

Why is it important that the respiratory system is kept moist and warm?

The moisture in the nose helps to heat and humidify the air, Increasing the amount of Water Vapor the air entering the Lungs contains. 15. This helps to keep the air entering the nose from Drying out the Lungs and other parts of our Respiratory System.

Why must respiratory surfaces for gas exchange be thin and moist quizlet?

Why do respiratory surfaces tend to be long and thin? To increase diffusion rate. Oxygen and carbon dioxide exchange occur entirely through diffusion.

Do respiratory structures have a selectively permeable membrane?

-Respiratory structures provide a large surface moist area, selectively permeable. Respiratory structures maintain a difference in the relative concentrations of oxygen and carbon dioxide on either side of the respiratory membrane, promoting diffusion.

What effect does the surface have on a respiratory surface?

Because of the enormous number of alveoli (approximately 300 million in each human lung), the surface area of the lung is very large (75 m²). Having such a large surface area increases the amount of gas that can diffuse into and out of the lungs.

Why do the alveoli need to be moist?

The layer of moisture in the alveoli allows gases to dissolve so that they can diffuse quickly. The alveoli have a very large total surface area and a very good blood supply, provided by the dense network of capillaries that surround them.

Why is it important for the air that enters the body to be warmed and moistened by the cilia and mucus lining of the nose?

These structures allow us to breathe and speak. They warm and clean the air we inhale: mucous membranes lining upper respiratory structures trap some foreign particles, including smoke and other pollutants, before the air travels down to the lungs.

Why is it important to maintain the health of the respiratory and circulatory systems?

The body cells need a continuous supply of oxygen for the metabolic processes that are necessary to maintain life. The respiratory system works with the circulatory system to provide this oxygen and to remove the waste products of metabolism. It also helps to regulate pH of the blood.

Is it important that respiratory and circulatory systems work together Why?

The respiratory system works directly with the circulatory system to provide oxygen to the body. Oxygen taken in from the respiratory system moves into blood vessels that then circulate oxygen-rich blood to tissues and cells.

Why is the alveolar surface moist quizlet?

Alveoli are lined by a layer of thin, moist epithelium, which makes it easy for dissolved oxygen and carbon dioxide to diffuse across into and out of the surrounding capillaries network. ... The continual movement of air maintains high oxygen and low carbon dioxide concentrations at the respiratory surface.

What is the respiratory surface where gas exchange occurs quizlet?

Gas exchange occurs in the lungs' alveoli. Damage to alveoli reduces the surface area for gas exchange.

What are the necessary characteristics for a respiratory surface?

A good respiratory surface should have a high surface area, moist and thin walls and in contact with many blood capillaries to allow easy exchange of gases or diffusion.

What happens when your diaphragm relaxes and moves upward?

This movement creates a vacuum in your chest, allowing your chest to expand (get bigger) and pull in air. When you breathe out, your diaphragm relaxes and curves back up as your lungs push the air out.

Why should respiratory surfaces be thin?

Answer: The respiratory surface is thin and vascularized so that ​gaseous exchange can take place easily and oxygen can directly spread into the blood.

How substances move from a higher concentration to a lesser concentration?

This spread of particles through random motion from an area of high concentration to an area of lower concentration is known as diffusion. ... In living systems, diffusion is responsible for the movement of a large number of substances, such as gases and small uncharged molecules, into and out of cells.