Respiratory Systems 1

What milestone did the fishy-looking ancestor achieve about 380 million years ago?

• Breathing air

• Developing gills

• Growing fleshy fins

• Living on land

What is the main function of the nose in the respiratory system?

• Detecting odors

• Warming and moistening incoming air

• Producing mucus

• Filtering out dust and particles

What is the purpose of the epiglottis in the respiratory system?

• Producing mucus to moisten the air

• Covering the larynx to prevent food and liquids from entering the lungs

• Directing food and liquids toward the lungs

• Supporting the trachea

What is the function of the alveoli in the respiratory system?

• Warming and moistening incoming air

• Producing mucus

• Gas exchange with the bloodstream

• Filtering out dust and particles

What is the role of the diaphragm in the breathing process?

• Expanding the chest cavity to inhale air

• Producing mucus to moisten the air

• Supporting the trachea

• Contracting to push air out of the lungs

What is the purpose of the rings in the trachea?

• To keep the trachea flexible

• To warm and moisten incoming air

• To support the trachea during breathing

• To prevent the trachea from collapsing

What is the total surface area of the alveoli in both lungs?

• 50 square meters

• 75 square meters

• 100 square meters

• 125 square meters

What are the two main principles that make respiration possible?

• Endocytosis and exocytosis

• Active transport and passive transport

• Osmosis and filtration

• Bulk flow and diffusion