Generate Quiz 6A27060ED7214

When the diaphragm contracts during inspiration, its dome shape flattens, while the rib cage moves forward and upward when the external intercostal contracts and the internal intercostal relaxes. The thoracic cavity’s inner space expands as a result of these two occurrences. As a result, the pressure in the lungs and thorax is lowered below atmospheric pressure. The thorax’s volume rises as its pressure falls (NBF, page 9). Option E is therefore the right response.

Option A is accurate because acute refers to something that happened abruptly and doesn’t affect the person for a long time.

‘Windpipe’ is another term for the trachea.

In a leaf,’stomata’ (singular: stoma) are pores that facilitate the exchange of carbon dioxide and oxygen as well as the transpirational loss of water vapor. Stomata typically close at night and open in the morning when the leaf receives light.

Animals’ moist membranes allow carbon dioxide and oxygen to diffuse through them. Simple animals have direct interactions with their surroundings. However, in complex animals like mammals, the environment and blood exchange information. Diffusion transports oxygen from the lungs to the bloodstream during gas exchange. Carbon dioxide travels from the blood to the lungs at the same time. Between the alveoli and a system of microscopic blood vessels called capillaries, which are found in the alveolar walls, this occurs in the lungs.

The moisture in our lungs and respiratory system causes water vapor to be released into the air when we exhale. When this warm, humid air comes into contact with a cold surface, it can cause water droplets to form. This is because water vapor condenses into microscopic droplets on the surface as the air temperature drops.