Respiratory Physiology Flashcards
What is the primary function of the respiratory system?
Taking in oxygen and expelling carbon dioxide
What are the primary organs of the respiratory system?
Lungs
What is the site of gaseous exchange in the respiratory system?
Lungs
Why is it important for the respiratory system to interact with the cardiovascular system?
To facilitate the exchange of gases
What are the two structural divisions of the respiratory system?
Upper Respiratory Tract and Lower Respiratory Tract
List the components of the Upper Respiratory Tract.
- Nasal cavity
- Pharynx
- Larynx
List the components of the Lower Respiratory Tract.
- Trachea
- Bronchi
- Bronchioles
- Alveoli
What are the two functional parts of the respiratory system?
Conducting Zone and Respiratory Zone
The Conducting Zone includes the structures involved in air passage, while the Respiratory Zone is involved in gas exchange.
List the components of the Conducting Zone.
- Pharynx
- Larynx
- Trachea
- Bronchi
- Tertiary bronchioles
- Bronchiole
The Conducting Zone is responsible for transporting air to the lungs.
What structures are included in the Upper Respiratory Tract?
- Nose
- Pharynx
- Larynx
The Upper Respiratory Tract is involved in filtering, warming, and humidifying the air.
What is the primary function of the Respiratory Zone?
Gas exchange
The Respiratory Zone includes structures where oxygen and carbon dioxide are exchanged.
List the components of the Respiratory Zone.
- Respiratory bronchioles
- Alveolar ducts
- Alveolar sacs
- Alveoli
The Respiratory Zone facilitates the exchange of gases with the blood.
Fill in the blank: The _______ is a dome-shaped muscle that plays a crucial role in breathing.
Diaphragm
The diaphragm contracts and relaxes to help draw air into and expel air from the lungs.
What is the role of the Pleura in the respiratory system?
To provide a lubricated surface for the lungs to expand and contract
The pleura is a double-layered membrane surrounding the lungs.
True or False: The Bronchiole is part of the Conducting Zone.
True
Bronchioles are the smallest air passages in the Conducting Zone.
What is the function of the Frontal sinus?
To produce mucus and lighten the skull
The Frontal sinus is one of the paranasal sinuses that contribute to respiratory function.
Fill in the blank: The _______ is responsible for the passage of air from the throat to the trachea.
Larynx
The larynx also contains the vocal cords and is involved in sound production.
What is the conducting portion of the respiratory system?
System of interconnecting cavities and tubes that conduct air into the lungs
What is the respiratory portion of the respiratory system?
System where the exchange of respiratory gases occurs
What lines the interior area of the nasal cavity?
A sticky mucous membrane
The mucous membrane helps trap particles and humidifies the air.
What divides the nasal cavity medially?
The nasal septum
The nasal septum separates the two nostrils.
What are nasal conchae?
Structures that divide the cavity into passageways
They help increase the surface area for warming and filtering air.
How do nasal conchae contribute to respiratory function?
They increase surface area to warm and filter incoming air
This enhances the efficiency of the respiratory system.
What happens to particles trapped in the mucus of the nasal cavity?
They are carried to the pharynx by ciliary action
This mechanism helps clear debris and pathogens from the airways.
Fill in the blank: Particles trapped in mucus are swallowed and carried to the stomach where ______ destroys any micro-organisms.
gastric juice
Gastric juice contains strong acids that can kill most microorganisms.
What are the two main air passages into the lungs called?
Bronchi
The bronchi are crucial for airflow into the lungs.
What are the primary bronchi that branch from the trachea?
Right and left primary bronchi
These are the initial divisions of the bronchial tree.
What do the primary bronchi further subdivide into?
Bronchioles
The bronchioles are smaller branches that lead to alveolar ducts.
What structures do bronchioles give rise to?
Alveolar ducts
Alveolar ducts lead to the alveoli, where gas exchange occurs.
Where do alveolar ducts terminate?
Alveoli
Alveoli are the tiny air sacs where oxygen and carbon dioxide exchange happens.
What are the alveoli?
The site where gas exchange takes place
How many alveoli are there in the lungs?
Around 300 million
What is the shape of the alveoli?
Cup-shaped pouching
What lines the alveoli?
Epithelium
What supports the alveoli?
A thin elastic basement membrane
What are alveolar sacs?
2 or more alveoli that share a common opening
What is the function of the moist lining in the alveoli?
To reduce friction
What surrounds the alveoli?
A dense network of capillaries
How many lobes does the right lung have?
Three lobes
How many lobes does the left lung have?
Two lobes
What is each lobe of the lung composed of?
Lobules
Name four components contained within each lobule of the lung.
- Air passages
- Alveoli
- Nerves
- Blood vessels
- Lymphatic vessels
- Connective tissues
True or False: The left lung has three lobes.
False
Fill in the blank: The right lung has ______ lobes.
three
Fill in the blank: The left lung has ______ lobes.
two
What is the pleural cavity?
A layer of serous membrane between the visceral pleura and the parietal pleura.
What does the pleural cavity contain?
A lubricating fluid secreted by the membranes.
What is the function of the lubricating fluid in the pleural cavity?
Prevents friction between the membranes and allows their easy movement during breathing.
True or False: The pleural cavity is located between the visceral pleura and the parietal pleura.
True
What are the accessory inspiratory muscles?
Sternocleidomastoid muscle, Scalene muscles, Pectoralis minor muscle, Serratus anterior muscle
These muscles assist in the inhalation process by expanding the thoracic cavity.
What is the primary inspiratory muscle?
Diaphragm
The diaphragm is the main muscle responsible for breathing, contracting to draw air into the lungs.
Which muscles are considered primary inspiratory muscles?
Diaphragm, External intercostal muscles
These muscles play a crucial role in the process of inhalation.
What are the accessory expiratory muscles?
Internal intercostal muscles, External abdominal obliques, Internal oblique muscle
These muscles assist in forced expiration by decreasing the volume of the thoracic cavity.
Fill in the blank: The primary inspiratory muscle is the _______.
Diaphragm
True or False: The external intercostal muscles are accessory inspiratory muscles.
False
The external intercostal muscles are primary inspiratory muscles.
What is diffusion?
The movement from an area of high concentration to an area of low concentration
Diffusion is a fundamental concept in various scientific fields, including biology and chemistry.
What does Boyle’s Law state?
The pressure of a given gas is inversely proportional to its volume at constant temperature
Boyle’s Law is a key principle in gas physics, important for understanding how gases behave under different conditions.