What is the primary function of the respiratory system?

• To produce digestive enzymes

• To bring oxygen into the body and expel carbon dioxide

• To circulate blood throughout the body

• To break down food into nutrients

Which of the following is NOT a function of the respiratory system?

• Producing vocal sounds

• Helping with the sense of smell

• Regulating blood pH

• Digesting food

What is external respiration?

• Gas transport in blood and exchange with body cells

• Process of ATP production in mitochondria

• Ventilation or breathing; allows gas exchange in lungs

• Filtration of blood in the kidneys

What is the role of cellular respiration?

• To filter and moisten incoming air

• To produce ATP using oxygen and give off carbon dioxide

• To transport oxygen in the blood

• To regulate blood pressure

What is the function of the nostrils (external nares)?

• To separate the nasal cavity into left and right portions

• To provide openings for air to enter and leave the nasal cavity

• To support the mucous membrane

• To contain olfactory receptors

What separates the nasal cavity into left and right portions?

• Nasal conchae

• Olfactory receptors

• Nasal septum

• Mucous membrane

What is the role of nasal conchae (turbinate bones)?

• To trap dust and pathogens

• To curl in from lateral walls of the cavity

• To contain olfactory receptors

• To warm and moisten air

What type of epithelium lines the nasal cavity?

• Simple squamous epithelium

• Stratified squamous epithelium

• Pseudostratified ciliated epithelium

• Transitional epithelium

What is the function of olfactory receptors in the nasal cavity?

• To filter incoming air

• To provide a sense of smell

• To separate the nasal cavity

• To produce mucus

Where are the paranasal sinuses located?

• In the arms and legs

• In the maxillary, frontal, ethmoid, and sphenoid bones of the skull

• In the spine and ribs

• In the hands and feet