Gas Exchange Flashcards
What is gas exchange?
The process of transferring oxygen from the environment to the bloodstream and carbon dioxide from the bloodstream to the environment.
True or False: Gas exchange occurs in the alveoli of the lungs.
True
Fill in the blank: The primary gas exchanged in the lungs is ______.
oxygen
What is the role of hemoglobin in gas exchange?
Hemoglobin binds to oxygen in the lungs and carries it to tissues throughout the body.
Multiple Choice: Which of the following gases is primarily expelled during gas exchange? A) Oxygen B) Nitrogen C) Carbon Dioxide D) Helium
C) Carbon Dioxide
What is the significance of partial pressure in gas exchange?
Partial pressure determines the direction of gas diffusion; gases move from areas of higher partial pressure to lower partial pressure.
True or False: Gas exchange can occur in both aquatic and terrestrial organisms.
True
What is the function of surfactant in the alveoli?
Surfactant reduces surface tension, preventing alveolar collapse and aiding in gas exchange.
Fill in the blank: The exchange of gases in the tissues is known as ______.
internal respiration
What is external respiration?
The exchange of gases between the lungs and the environment.
Multiple Choice: Which structure in the respiratory system is primarily responsible for gas exchange? A) Trachea B) Bronchi C) Alveoli D) Lungs
C) Alveoli
What is the respiratory membrane?
The barrier between the alveolar air and the blood in the capillaries, consisting of alveolar epithelium and capillary endothelium.
True or False: Gas exchange only occurs during inhalation.
False
What is the primary driving force for gas exchange?
Diffusion, driven by concentration gradients of gases.
Fill in the blank: The process by which oxygen enters the bloodstream is called ______.
oxygenation
Multiple Choice: Which condition can impair gas exchange? A) Asthma B) Hypertension C) Diabetes D) Osteoporosis
A) Asthma
What is the role of the diaphragm in gas exchange?
The diaphragm contracts to create negative pressure in the thoracic cavity, allowing air to flow into the lungs.
True or False: Carbon dioxide is more soluble in blood than oxygen.
True
What is the Bohr effect?
The phenomenon where increased carbon dioxide concentration causes hemoglobin to release oxygen more readily.
Fill in the blank: The primary site of gas exchange in fish is the ______.
gills
Multiple Choice: In mammals, which gas is primarily transported in the form of bicarbonate ions? A) Oxygen B) Carbon Dioxide C) Nitrogen D) Hydrogen
B) Carbon Dioxide
What is the significance of the concentration gradient in gas exchange?
It facilitates the movement of gases from areas of high concentration to areas of low concentration.
True or False: Gas exchange is a passive process.
True
What is the main purpose of gas exchange in living organisms?
To supply oxygen for cellular respiration and remove carbon dioxide.
