Respiratory System Review

How many cells approximately does the human body contain?

• Over 100 trillion

• Nearly 5 trillion

• More than 15 trillion

• About 10 billion

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-3

What is the primary function of the respiratory system?

• To digest food

• To supply the body with oxygen

• To circulate blood

• To control body temperature

Which part of the brain is mainly responsible for initiating the breathing process?

• Hypothalamus

• Cerebrum

• Medulla oblongata

• Cerebellum

What triggers the body to inhale more oxygen?

• Signals from the brain

• Higher blood pressure

• Increased heart rate

• Decreased body temperature

What is the role of mucus in the respiratory system?

• To trap dirt and pathogens

• To produce sound

• To cool down the air

• To facilitate gas exchange

What is the function of the olfactory receptors?

• To produce mucus

• To detect light

• To detect smells

• To sense taste

Why is the trachea supported by C-shaped cartilage rings?

• To increase flexibility

• To facilitate sound production

• To store oxygen

• To prevent collapse during inhalation

Where does the gas exchange between oxygen and carbon dioxide take place?

• Pharynx

• Bronchi

• Trachea

• Alveoli

What role do the capillaries play in the alveoli?

• Facilitate gas exchange

• Transport nutrients

• Carry waste products

• Regulate blood pressure

Tags

NGSS.MS-LS2-3

How does the body expel carbon dioxide?

• Via the circulatory system

• Through the lungs

• Through the skin

• Via the digestive system