Exam Study Notes Flashcards
What altitude is the physiological zone?
MSL - 10,000ft
How does atmospheric pressure work?
It increases closer to sea level and decreases the higher you go in altitude
What is the law of gaseous diffusion (Graham’s law)
Gas molecules will diffuse through a permeable membrane from and area of high pressure to one of low pressure.
What is Boyle’s law?
It states that the volume of a gas is inversely proportional to the pressure, temperature remains constant.
What is Henry’s law?
At a constant temperature, the amount of gas dissolved in a solution is directly proportional to the partial pressure of that gas over the solution.
What is Dalton’s law?
Danton’s law states that the total pressure of a mixture of gases is equal to the sun of the partial pressure of each of the constituent gasses in the mixture.
What is Charles’ law?
It states that the volume of a gas varies directly with the temperature at a constant pressure
What direction does red blood travel in regards to the heart?
Red blood travels away from the heart
What direction does purple/blue blood travel in regards to the heart?
They travel to the heart and is then oxygenated and pushed out as red blood back into the body.
What does the carbon dioxide in your body do?
Controls the rate and depth of breathing.
When are oxygen Chemoreceptors located?
In the carotid arteries and the aorta.
What are the 4 types of hypoxia?
Hypoxia hypoxia, hypaemic hypoxia, stagnate hypoxia and historicity hypoxia
What is hypoxic hypoxia?
Reduced diffusion of oxygen from the alveoli to blood.
What is hypaemic hypoxia?
Reduced ability of blood to transport oxygen
What is stagnant hypoxia
Reduced blood flow to the tissues
What is hystotoxic hypoxia?
The inability of cells to utilise oxygen.
What is hypoxia?
The state of oxygen deficiency at tissue cell level sufficient to cause impairment of function.
What are the signs and symptoms of hypoxia?
Personality change, loss of judgement, loss of self-criticism, euphoria, loss of short term memory, mental in coordination,
What is the TUC at 25,00ft?
3-5 mins
What are the causes of vibration in flight for fixed wing aircraft?
Turbulence, engines/props, high G, wing flexing, high speed.
What are the causes of vibration in flight for a rotary wing aircraft?
Engines/transmissions, rotate, blade pass frequency, blade flap.
What are the 2 types of photoreceptors in the eye?
Cones and rods.
