All aspects of breathing are closely associated with the overall need for ________, metabolic processes, muscle activity, and the production of CO2.
2
New cards
Diffusion
________ can only occur if a difference in concentration exists, and such a difference is called a concentration gradient.
3
New cards
walls of each capillary
The ________ are one cell thick, which provides a very short distance for gases to diffuse.
4
New cards
External Respiration
________ refers to the processes that occur within the lungs involving the exchange of O2 and CO2.
5
New cards
Inspiration
________: Air flows into the lungs due to increased lung volume following the contraction of the diaphragm and intercostal muscles.
6
New cards
Cellular respiration
________ is the process in which the cells use O2 to generate energy.
7
New cards
alveolar ducts
Bronchioles, ________, and alveolar sacs are all structures of the respiratory zone that are involved with the exchange of gases between inspired air and the blood.
8
New cards
Expiration
________: Air is expelled from the lungs due to the relaxation of the diaphragm and the intercostal muscles.
9
New cards
The respiratory zone
________ is where gas exchange occurs.
10
New cards
Inspiration
________ is an active process, requiring the contraction of various respiratory muscles and therefore the expenditure of significant amounts of energy.
11
New cards
The respiratory system can be divided into two main zones
the^^"conductive zone"^^ and the"respiratory zone."
12
New cards
Internal respiration
refers to the exchange of gases at the tissue level.
13
New cards
O2 Transport
O2 Transport ā¢ The process by which O2 is absorbed in the lungs and carried to the peripheral tissues.
14
New cards
CO2 Transport
The process by which CO2 in blood is moved into the alveoli and then exhaled from the body.
15
New cards
a-vO2 diff
The difference between the amount of O2 in the artery and vein reflects the amount of O2 that was delivered to the muscle.
16
New cards
The Mechanics of Breathing
The combination of inspiration and expiration together is known as āventilation.ā
17
New cards
How many alveolar sacs are there in the average person's lungs?
300 million alveolar sacs
18
New cards
What are the aspects of breathing are closely associated with?
the overall need of O2, metabolic processes, and muscle activity.
19
New cards
How is your breathing controlled?
Your breathing is controlled by the many different forms of feedback from specialized sensory systems to the neural control centers within the brain.
20
New cards
What is the respiratory system?
The respiratory system is the network of organs and tissues that help you to breathe.