Understanding the Human Respiratory System

What is the primary function of the human respiratory system?

• To circulate blood throughout the body

• To intake oxygen and expel carbon dioxide

• To digest food and absorb nutrients

• To control body temperature

Which part of the respiratory system is known as the voice box?

• Pharynx

• Trachea

• Larynx

• Bronchi

Which structure prevents food from entering the trachea?

• Pharynx

• Epiglottis

• Esophagus

• Larynx

What is the significance of the cardiac notch in the left lung?

• It filters the air entering the lungs

• It supports the bronchi

• It increases lung capacity

• It allows space for the heart

Which system works closely with the respiratory system to transport oxygen and carbon dioxide?

• Endocrine system

• Circulatory system

• Digestive system

• Nervous system

What is the role of alveoli in the respiratory system?

• To warm and humidify the air

• To produce vocal sounds

• To facilitate gas exchange

• To filter out dust and pathogens

What is the function of the diaphragm in respiration?

• To filter the air

• To produce sound

• To aid in gas exchange

• To help expand or contract the thoracic cavity

How does the body regulate involuntary breathing?

• Through muscle contractions

• Using pH levels in the blood

• By neural impulses from the heart

• Through voluntary nerve control

Tags

NGSS.HS-LS1-3

Which cells produce surfactant in the alveoli?

• Type 1 alveolar cells

• Type 2 alveolar cells

• Bronchial cells

• Epithelial cells

What can cause the alveoli to collapse in premature babies?

• Low blood pH levels

• Overactive diaphragm movement

• Lack of surfactant

• Excess oxygen intake