Gas exchange in Humans Flashcards
What is the primary function of the respiratory system in humans?
To facilitate gas exchange, primarily oxygen intake and carbon dioxide removal.
True or False: The diaphragm is a muscle that helps in the process of breathing.
True
Fill in the blank: The main organ for gas exchange in humans is the __________.
lungs
What are alveoli?
Tiny air sacs in the lungs where gas exchange occurs.
Which gas do humans primarily inhale?
Oxygen
What is the process called when oxygen moves from the alveoli into the blood?
Diffusion
Which part of the brain controls the rate of breathing?
Medulla oblongata
True or False: Carbon dioxide is a waste product of respiration.
True
What is the role of the trachea in the respiratory system?
To transport air to and from the lungs.
Multiple Choice: What structures increase the surface area for gas exchange in the lungs? A) Bronchi B) Alveoli C) Trachea D) Diaphragm
B) Alveoli
What happens during inhalation?
The diaphragm contracts and moves down, expanding the thoracic cavity and drawing air into the lungs.
Fill in the blank: The exchange of gases between the blood and body cells is called __________.
internal respiration
What is the main component of exhaled air?
Carbon dioxide
True or False: The human respiratory system is responsible for the olfactory sense.
True
What is the function of the epiglottis?
To prevent food from entering the trachea during swallowing.
Multiple Choice: Which of the following is NOT a part of the respiratory system? A) Larynx B) Esophagus C) Bronchi D) Alveoli
B) Esophagus
What is the role of surfactant in the alveoli?
To reduce surface tension and prevent the collapse of alveoli.
Fill in the blank: The process of breathing out is called __________.
exhalation
What is tidal volume?
The amount of air inhaled or exhaled during normal breathing.
True or False: The lungs are located in the abdominal cavity.
False
What is the pathway of air from the nose to the lungs?
Nose -> Pharynx -> Larynx -> Trachea -> Bronchi -> Bronchioles -> Alveoli
Multiple Choice: Which gas is primarily transported in the blood by hemoglobin? A) Nitrogen B) Oxygen C) Carbon Dioxide D) Argon
B) Oxygen
What is the role of cilia in the respiratory system?
To trap and move particles out of the airways.
Fill in the blank: The part of the respiratory system that produces sound is the __________.
larynx
