which best describes the function of the respiratory system?
a) provides for passive exchange of oxygen and co2 in the alveoli of the lung
b) mechanism for breathing
3) bring co2 and o2 into the lungs
4) provides the body with needed oxygen
a)?
which best describes the function of the digestive system?
a) digest food and eliminate waste
b) get nutrients from food
c) break down food into glucose, amino acids, fatty acids, reabsorb needed water, and eliminate waste
d) eliminate urea and drug metabolites in urine
C?
The correct answer is a) provides for passive exchange of oxygen and CO2 in the alveoli of the lung.
To determine the correct answer, we need to understand the functions of the respiratory system and compare them with the given options.
The respiratory system is responsible for the exchange of gases between the body and the external environment. It consists of various organs and structures such as the nose, trachea, bronchi, and lungs. The main function of the respiratory system is to obtain oxygen from the air and eliminate carbon dioxide produced by cellular metabolism.
Option a) states that the respiratory system provides for the passive exchange of oxygen and carbon dioxide in the alveoli of the lung. The alveoli are small air sacs in the lungs where gas exchange takes place. Oxygen from inhaled air diffuses into the bloodstream, while carbon dioxide from the bloodstream is expelled into the alveoli to be exhaled. This option accurately describes one of the key functions of the respiratory system.
Option b) refers to the mechanism of breathing, which is an essential process for the respiratory system but does not encompass its entire function.
Option c) states that the respiratory system brings carbon dioxide and oxygen into the lungs. While this option partially describes the function, it does not encompass the entire process of gas exchange that occurs within the alveoli.
Option d) claims that the respiratory system provides the body with needed oxygen. While this is true, it does not address the elimination of carbon dioxide or the specific role of the alveoli in gas exchange.
Therefore, the most accurate and complete description of the function of the respiratory system is a) provides for passive exchange of oxygen and CO2 in the alveoli of the lung.