Unit 1 Flashcards
What can high blood pressure cause?
Blood vessels to burst leading to a stroke
What does low blood pressure cause?
Dizziness and fainting
Define fitness and health
Fitness-ability to do physical exercise
Health-free from disease
What are the 4 (S) of fitness
Speed
Suppleness
Strength
Stamina
How does smoking increase blood pressure?
CO(carbon monoxide) cause blood to carry less O2 as it combines with haemoglobin
Nicotine directly increases it
How is heart disease caused?
Restricted blood flow to the heart muscles as the narrowing of arteries caused by plague block the coronary arteries.
What are carbohydrates?
Simple sugars such as glucose
What are proteins made up of?
Amino acids
What are fats made up of?
Glycerol
Whats a first class protein?
They contain all the essential amino acids that cannot be made in the human body
Whats a second class protein?
They don’t contain all the essential amino acids
What does a lack of protein cause?
Kwashiokor
What causes malaria?
A protozoan which feeds on humans red blood cells
What are vectors?
Things that carry the disease but are not affected
What is a parasite?
An organisum that feeds on another
How can you reduce the risk of cancer?
Changes in diet
Not smoking
Using uv sun protection
What is a pathogen?
A disease causing organism that produce toxins that damage body cells
What do antibodies do?
(Lock and key)
Lock onto antigens to kill the pathogen
What is active immunity?
White blood cells producing antibodies
Placebo definition
Harmless pill used to help find the effect of new drugs
What part of the eye refracts light?
Cornea and lens
What does the retina contain?
Light receptors