NRS414 Section 2 Flashcards
Oxygen and carbon dioxide are exchanged between the lungs and capillaries via
Diffusion
What is the correct order of the cardiac conduction system
SA node, AV node, AV bundle, Purkinje fibres
What is the correct term for the tissue that forms the walls of the heart
Myocardium
What is the role of the coronary arteries
They supply blood to the heart
What is systolic pressure
The maximum pressure during ventricular contraction
What is the name of the large artery that carries oxygenated blood from the left ventricle
Aorta
What type of muscle makes up the myocardium
Cardiac muscle
Cardiac muscles can be described as
Involuntary, multibranched with intercalated disc
In the systemic circulation, which vessel carries deoxygenated blood
Vein
What mechanism helps blood to return to the heart
The action of contracting skeletal muscle
Which muscle is responsible for normal resting inspiration
Diaphragm
If you were to hold your breath what would happen to the carbon dioxide levels in your blood
Increase
What is the name of the tiny air fill sacs responsible for gaseous exchange
Alveoli
What should happen to the respiratory rate if carbon dioxide level rise in the blood
It would increase
When inhaling identify the correct order of structure the air would pass by
Pharynx, larynx, trachea, bronchus
What happens to intrathoracic pressure when the diaphragm moves downwards during inspiration
It decreases
Where are the respiratory centres located
In the medulla oblongata and the pons
What is the normal concentration of oxygen in room air at sea level
21%
Which muscle is used during forced expiration
Internal intercostal muscles
Do the left and right lung have an equal number of lobes
False
