Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
26 Cards in this Set
- Front
- Back
|
Why does decreasing pressure with altitude make it more difficult to breathe? |
Because of the wider spread of air molecules |
|
|
What is physiology? |
The study of how the body functions |
|
|
According to Dalton's law, what is the total pressure that the human body experiences? |
The sum of the partial pressures exerted on it by oxygen, nitrogen, and trace gases |
|
|
What did Henry, a British chemist, learn in 1803? |
The amount of gas dissolved in a volume of liquid is proportional to the pressure of the gas. As pressure increases,more gas dissolves in the liquid, and as pressure decreases, more gas escapes the liquid |
|
|
What is the respiratory systems main purpose? |
To take in oxygen and get rid of carbon dioxide |
|
|
What are the cardiovascular systems principal parts? |
Heart, pulmonary arteries, pulmonary veins, and capillaries |
|
|
Pulmonary arteries |
Blood vessels that carry blood from the heart to the organs and tissues |
|
|
Pulmonary veins |
Blood vessels that carry blood from the organs and tissues to the heart |
|
|
Capillaries |
Very small blood vessels branching off arteries and veins |
|
|
What does oxygen starvation generally affect first? |
Brain, your judgment is the first thing to go |
|
|
What type of exposure could cause decompression sickness? |
Flying in an unpressurized aircraft to high altitude or in an aircraft that suddenly experiences decompression, the loss of cabin pressure, because of a malfunction or accident |
|
|
What is the most hazardous g-force? |
Gz axis |
|
|
How quickly a pilot goes from reduced sight to unconsciousness depends on what? |
On how fast the aircraft is accelerating |
|
|
What is it that the eyes do when a pilot flies by visual flight rules? |
The eyes can correct any false readings coming from the other two systems. This is because the eyes can see the horizon and ground and use the references to balance out input from the other systems |
|
|
How is motion sickness like spatial disorientation? |
Is a product of the brain receiving conflicting messages about the bodys true position |
|
|
What are some stresses that can seriously degrade pilot performance? |
Cigarettes, alcohol, and drugs |
|
|
What are some common signs of dehydration? |
Headache, fatigue, cramps, sleepiness, and dizziness |
|
|
Diaphragm |
Principal muscle that helps the lungs draw in and expel air |
|
|
Lungs/Blood vessels |
Distribute oxygen to the body as well as retrieve carbon dioxide from it |
|
|
Aerota |
A giant artery that sends blood back into circulation to feed oxygen to body organs and tissues |
|
|
Superior/Inferior vena cavae |
Carry blood thats low in oxygen from different parts of your body to the right atrium |
|
|
Tissue |
The cells and any substance found between cells that make up muscles, skin, or other body parts |
|
|
What are some symptoms of Hypoxia? |
Increased breathing rate, headache, tingling in the fingers and toes, impaired judgment, tunnel vision, first affects the brain, lightheadedness, suffocation, drowsiness |
|
|
What are some symptoms of Hyperventilation? |
Breathing too quickly, solution is to breathe more slowly, sometimes into a paper or cloth bag |
|
|
What are some symptoms of Trapped Gas? |
A good demonstration of Boyle's law, even a slight difference in pressure can cause discomfort |
|
|
What are some synptoms of Altitude-induced Decompression Sickness? |
Joint pain, illustrates Henry's law |
