The Human Organism Flashcards
In the nervous system, what part contains the brain and the spinal chord?
Central nervous system.
If something occurs outside the central nervous system, then it occurs in the blank.
Peripheral nervous system.
If you spill coffee on your hand, what part of the nervous system is activated?
Autonomic nervous system.
If air traffic control tells you to change your heading 010, what part of the nervous system is activated?
The somatic nervous system.
The autonomic nervous system can be split up into the sympathetic and the parasympathetic nervous system. Explain the sympathetic nervous system.
The fight or flight response.
The autonomic nervous system can be split up into the sympathetic and the parasympathetic nervous system. Explain the parasympathetic nervous system.
The rest and digest cycle.
What do proprioceptors allow humans to do?
Allow us to respond to the space around us.
Where are mechanoreceptors located?
Tendons.
Blank is a biologically based trait that increases as there is an increased awareness to environmental stimulation.
Sensitivity.
When do you use photopic vision and are cones or rods used during this time?
Daytime. Cones.
When do you use photopic vision and are cones or rods used during this time?
Daytime. Cones.
When do you use scotopic vision and are cones or rods used during this time?
Nighttime. Rods.
What happens to your sensory threshold when you become tired?
It increases.
What happens to your sensory threshold when you are in a club with loud music?
It increases.
What happens to your sensitivity when your sensitivity threshold increases?
It decreases.
What is the term for when you have a decrease in behavioural response after repeated exposure?
Habituation.
You are in the cockpit and the you drown out the sound of the engine is an example of what?
Habituation
What is the name of the artery and veins that surround the heart?
Coronary.
What vein and artery go to and from the lungs?
Pulmonary.
A pulse is a blank blank that is caused by the pumping of the heart.
Pressure wave.
What is a heart stroke?
1 heart beat.
The amount if blood pumped by the left ventricle into the aorta, in one contraction, is also known as what?
The stroke volume.
What is the average stroke volume in a healthy adult?
70ml.
120/80 is the average blood pressure for a healthy adult. What is the top value?
Systolic.
120/80 is the average blood pressure for a healthy adult. What is the bottom value?
Diostolic.
What is the name of the pressure exerted when the heart contract?
Systolic.
What is the name of the pressure when then blood rushes back to fill the hearts ventricles?
Diastolic.
How does haemoglobin work?
Contains iron which attracts oxygen.
How much oxygen do red blood cells carry?
95%
How much oxygen does plasma carry?
5%
At sea level, what is the saturation levels of oxygen in blood?
97.5%
Why does anaemia mean for oxygen levels and why?
Lack of iron reduces oxygen levels.
At 20,000ft , what is the saturation levels of oxygen in blood?
65%
What does hypertension mean?
High blood pressure.
If your blood pressure is greater than 160/95, then you may have blank.
Hypertension.
True or false : a nose bleed is a symptom of hypertension?
True.
True or false : vomiting is a symptom of hypertension?
False.
True or false : coronary heart disease is a consequence of hypertension?
True.
True or false : kidney failure is a consequence of hypertension?
True.
What is hypotension?
Low blood pressure.
What may you have if your blood pressure is less than 90/60?
Hypotension.
True or false : tiredness is a symptom of hypotension.
True.
True or false : congestion is a symptom of hypotension.
True.
True or false : vertigo is a symptom of hypotension.
False.
True or false : fainting is a symptom of hypotension.
True.
True or false : hypertension is a cause of coronary heart disease.
True.
True or false : smoking is a cause of coronary heart disease.
True.
True or false : the flu is a cause of coronary heart disease.
False.
Whats it called when the coronary arteries narrow?
Angina.
When does angina occur?
During actions that require physical effort.
What causes a heart attack?
A blood clot.
What causes a cardiac arrest?
An electrical disturbance.
What reading must you take at level with your heart?
Blood pressure.
What is the average pulse of a healthy sportive adult in rest?
30-50 beats per minute.
After a rapid (but NOT explosive) decompression most passengers and the crew are unconscious after 45s. How high approximately is the aircraft?
35000ft
