gas exchange Flashcards
(15 cards)
What is gas exchange?
The process of obtaining oxygen from the environment and releasing carbon dioxide.
True or False: Gas exchange occurs in all living organisms.
True
Fill in the blank: The primary organ for gas exchange in humans is the ______.
lungs
What is the role of alveoli in gas exchange?
Alveoli are tiny air sacs in the lungs where oxygen and carbon dioxide are exchanged.
What is the term for the movement of gases across a membrane?
Diffusion
Multiple Choice: Which gas is primarily inhaled during gas exchange? A) Carbon Dioxide B) Oxygen C) Nitrogen
B) Oxygen
What is the function of hemoglobin in gas exchange?
Hemoglobin binds to oxygen in the lungs and transports it to tissues throughout the body.
True or False: Carbon dioxide is a waste product of cellular respiration.
True
What is the respiratory surface?
The area where gas exchange occurs, usually moist and thin to facilitate diffusion.
Fill in the blank: In insects, gas exchange occurs through openings called ______.
spiracles
What is tidal volume?
The volume of air inhaled or exhaled in a single breath during normal breathing.
Multiple Choice: Which of the following structures is NOT involved in gas exchange? A) Trachea B) Bronchi C) Esophagus
C) Esophagus
What is the significance of the concentration gradient in gas exchange?
It allows for the efficient diffusion of oxygen into the blood and carbon dioxide out of the blood.
True or False: Gas exchange can occur in both aquatic and terrestrial environments.
True
What is the role of surfactant in the lungs?
Surfactant reduces surface tension in the alveoli, preventing collapse and aiding in gas exchange.
