Biology Chapter on Gas Exchange and Absorption

The pressure and concentration gradients of the gases involved.

The alveoli are microscopic air sacs that create a large surface area for gas exchange. And the bronchioles, the small airways, are extensively branched, further increasing surface area.

The most likely ailment is asthma. Asthma is a chronic respiratory condition where the airways are inflamed and narrowed, making it difficult to breathe, especially during physical exertion.

<p>The small intestine has a large surface area for absorption, due to its length (approximately 6 meters) and its internal folds, and a <strong>villi</strong> that further increases surface area, as well as tiny projections called <strong>microvilli</strong> which further increases surface area. This design ensures efficient absorption of nutrients into the bloodstream.</p> Signup and view all the answers

The process where gases move across a membrane from high to low concentration.

Small air sacs in the lungs where gas exchange occurs.

Tiny blood vessels surrounding alveoli that transport gases.

A feature of lungs that allows quicker gas exchange.

Feature of lungs increasing gas exchange efficiency.

A disease that weakens and breaks down alveolar walls.

Caused by emphysema, leading to breathing difficulties.

Process of oxygen moving from alveoli to blood and vice versa.

System responsible for gas exchange in the body.

Adapted for nutrient absorption with villi and microvilli.

Finger-like projections in the small intestine aiding absorption.

Tiny projections on villi enhancing absorption efficiency.

Process of taking nutrients from the food into the bloodstream.

Movement of oxygen from lungs to body cells through blood.

The body’s process of taking in essential nutrients.

Facilitate exchange of oxygen, carbon dioxide, and nutrients.

Specifically, the transfer of oxygen and carbon dioxide at the alveoli.

The process of inhaling oxygen and exhaling carbon dioxide.

Lungs functioning properly to facilitate efficient gas exchange.

Physical activity increases the demand for oxygen.