Respiratory System - Nose and Pharynx Functions

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What is the main factor affecting breathing rate?

Increased H+ concentration leading to decreased pH (correct)

Low CO2 concentration in the blood

High O2 concentration in the blood

Elevated blood pressure

During strenuous exercise, why does breathing rate increase?

To decrease O2 levels in the body

To increase H+ levels in the blood

To expand lung capacity

To decrease CO2 levels in the body (correct)

What stimulates chemoreceptors to increase breathing rate?

A large drop in CO2 levels

A large drop in O2 levels (correct)

A high blood pressure reading

An increase in body temperature

What is the main component of gas exchange in the lungs and tissues?

Simple diffusion Signup and view all the answers

What is the function of fetal breathing movements during development?

To practice for post-birth breathing Signup and view all the answers

What characteristic of fetal blood makes it suitable for gas exchange at low pressures?

Greater affinity for O2 Signup and view all the answers

What is the main function of the cilia in the nose?

To push mucus and debris toward the throat Signup and view all the answers

Which part of the respiratory system serves as a major entrance and exit?

Nose Signup and view all the answers

What is the purpose of the epiglottis in the larynx?

To close off the trachea during swallowing Signup and view all the answers

Where does gas exchange primarily occur in the respiratory system?

Respiratory bronchioles Signup and view all the answers

Which term refers to the difficulty expanding the thoracic wall?

Compliance Signup and view all the answers

What does pulmonary ventilation refer to?

Breathing, moving air in and out of the lungs Signup and view all the answers

What is the role of the carina in the respiratory system?

Induce coughing if a foreign body is present Signup and view all the answers

What is Boyles law related to in terms of respiratory physiology?

Relationship between pressure and volume of air in lungs Signup and view all the answers

Which structure in the lungs is highly permeable to gases?

Alveoli Signup and view all the answers

What does total lung capacity represent?

The maximum air possible after a forceful inhalation Signup and view all the answers

Respiratory System - Nose and Pharynx Functions

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