Gas exchange Flashcards
(25 cards)
What is gas exchange?
The process by which organisms exchange gases with their environment, primarily oxygen and carbon dioxide.
True or False: Gas exchange occurs in all living organisms.
True
Fill in the blank: In humans, gas exchange primarily occurs in the _____ of the lungs.
alveoli
What is the role of alveoli in gas exchange?
Alveoli are tiny air sacs in the lungs where oxygen is absorbed into the blood and carbon dioxide is released.
What is the main gas that is inhaled during gas exchange?
Oxygen
What is the main gas that is exhaled during gas exchange?
Carbon dioxide
Multiple Choice: Which of the following structures is NOT involved in gas exchange? A) Alveoli B) Bronchi C) Trachea D) Heart
D) Heart
What is the primary function of hemoglobin in relation to gas exchange?
Hemoglobin binds to oxygen in the lungs and transports it to tissues throughout the body.
True or False: Gas exchange in plants occurs through stomata.
True
Fill in the blank: The process of gas exchange in plants is known as _____ and occurs during photosynthesis.
respiration
What is the significance of the concentration gradient in gas exchange?
A concentration gradient allows gases to move from areas of higher concentration to areas of lower concentration, facilitating efficient gas exchange.
Short Answer: Name one factor that can affect the rate of gas exchange.
Temperature, surface area, or concentration gradient.
Multiple Choice: Which gas is produced as a waste product of cellular respiration? A) Oxygen B) Nitrogen C) Carbon dioxide D) Hydrogen
C) Carbon dioxide
What is diffusion in the context of gas exchange?
The movement of gas molecules from an area of higher concentration to an area of lower concentration.
True or False: Gas exchange can occur in both aquatic and terrestrial organisms.
True
Fill in the blank: In fish, gas exchange occurs across the _____ in the gills.
gill membranes
What is the role of surfactant in the alveoli?
Surfactant reduces surface tension in the alveoli, preventing collapse and aiding in gas exchange.
Short Answer: What is one adaptation of the alveoli that facilitates gas exchange?
They have a large surface area and thin walls.
Multiple Choice: Which process do plants use to take in carbon dioxide? A) Photosynthesis B) Respiration C) Transpiration D) Evaporation
A) Photosynthesis
What is the respiratory system’s primary function?
To facilitate gas exchange between the body and the environment.
True or False: Gas exchange occurs only in the lungs in mammals.
False
Fill in the blank: The _____ system in animals is responsible for the transport of gases.
circulatory
What is the difference between internal and external respiration?
External respiration refers to gas exchange between the lungs and the environment, while internal respiration refers to gas exchange between blood and body cells.
Short Answer: How do environmental factors like altitude affect gas exchange?
At high altitudes, lower oxygen levels can impair gas exchange efficiency.
