Question 1:
Which of the following gases is exchanged during respiration in the lungs?
Explanation: During respiration in the lungs, the exchange of gases occurs. Oxygen is taken in from the inhaled air, and carbon dioxide, a waste product, is released from the body into the exhaled air.
Question 2:
Where does gas exchange primarily occur in the lungs?
Explanation: Gas exchange primarily occurs in the alveoli, which are small sacs located at the end of the bronchioles. Oxygen from inhaled air diffuses into the bloodstream, while carbon dioxide from the bloodstream diffuses into the alveoli to be exhaled.
Question 3:
Which of the following factors affects the efficiency of gas exchange in the lungs?
Explanation: The efficiency of gas exchange in the lungs is affected by multiple factors. These include the surface area of the lungs for gas exchange, the thinness of the respiratory membrane through which gases diffuse, and the partial pressure gradient of gases between the alveoli and the bloodstream. All of these factors contribute to efficient gas exchange.
Question 4:
Which of the following processes is involved in the transport of oxygen in the bloodstream?
Explanation: Oxygen is primarily transported in the bloodstream by binding to the protein molecule called hemoglobin present in red blood cells. This process is known as hemoglobin binding. Oxygen diffuses into the bloodstream in the lungs, binds to hemoglobin, and is transported to the body tissues.
Question 5:
Which of the following factors can affect the rate of gas diffusion in the lungs?
Explanation: The rate of gas diffusion in the lungs can be influenced by multiple factors. These include the surface area of the respiratory membrane available for gas exchange, the thinness of the respiratory membrane, and the concentration gradient of gases between the alveoli and the bloodstream. All of these factors play a role in determining the rate of gas diffusion.