B1 OCR Gateway

HideShow resource information
  • Created by: apple87
  • Created on: 23-02-14 16:27
What is meant by the term healthy?
How free of diseases and infections you are
1 of 54
What is meant by the term fit?
How well you can perform physical tasks
2 of 54
What factors lead to an high blood pressure?
Smoking, alcohol, overweight, being under stress for lond periods of time.
3 of 54
When blood pressure is at its highest it is called...
Systolic pressure
4 of 54
When blood pressure is at its lowest it is called...
Diastolic pressure
5 of 54
What health problems can high blood pressure cause?
It can cause bood vessels to burst leading to strokes, brain damage, kidney damage.
6 of 54
What health problems can low blood pressure cause?
Poor circulation means tissues don't get enough food and oxygen, this leads to dizzyness and fainting.
7 of 54
How does carbon monoxide increase blood pressure?
Combines with heamoglobin which reduces the amount of oxygen they can carry, so the heart has to pump faster to make up for it?
8 of 54
How does nicotine increase blood pressure?
Makes the heart contract more often
9 of 54
How can a heart attack happen?
If the conary atreries become narrow or a thrombosis cuts of the oxygen supply.
10 of 54
What do carbohydrates provide?
Provides energy as glucose
11 of 54
What do fats provide?
Provide energy, insulation, also store energy around organs as adipose tissue
12 of 54
What do proteins provide?
Needed for growth and repair, supply energy in emergancies.
13 of 54
What to vitamins and minerals provide?
Vitamin c to prevent scurvy, iron to make heamaglobin
14 of 54
What do we need water for?
To prevent dehydration.
15 of 54
How do energy and nutrient needs vary between people?
Age, children and teens need more protein for growth. Older people need calcium to protect again Osteoporosis. Femals needs iron to replace iron lost in menstrul blood. Active people need more protein for muscle development and more carbs for growth.
16 of 54
Why do people in developing countries have low protein diets?
Overpopulation protein rich food is in greater demand than is avaliable. There isn't enough money to invest in agriculture.
17 of 54
How do you work out someones EAR?
EAR=0.6xbody mass (KG)
18 of 54
How do you work out your BMI?
BMI = body mass/(Height squared)
19 of 54
What problems can Anorexia and Bulimia cause?
Liver failure, kidney failure, heart attacks, muscle wastage, low blood pressure, mineral deficiancies, fatalities. Bulimia leads to tooth decay, acid in vomit eats tooth enamel.
20 of 54
What is Anorexia?
Self starvation
21 of 54
What is Bulimia?
Binge eating followed by self induced vomiting.
22 of 54
What four types of microorganisms are there?
Fungi- athletes foot, Bacteria- Cholera, Viruses-Flu, Protozoa- dysentry, single celled organisms.
23 of 54
What is a parasite?
An orgaism that lives of anouther called a host.
24 of 54
What is a vector?
An animal that carries a disease without being affeted by it, eg mosquitoes.
25 of 54
How does your immune system fight off pathogens?
Consum them, wite blood cells engulf and digest foreign cells. Producing antitoxins, countact any effect cause by the patogen toxins. Producing antibodies,Lock onto the surface of the of the pathogen and kill it, they are produced by white bood cells
26 of 54
What is active immunity?
When the body makes its own antibodies and is usually permanent
27 of 54
What is passive immunity?
Where anitboidies are made by anouther organism eg breast feeding. Is only temporary.
28 of 54
What do antivirals do?
They stop viruses from reproducing?
29 of 54
What is a Benign tumor?
When a tumor grows untill there is no more room and stays where it is.
30 of 54
What is a malignant tumor?
Where the tumor grows and spreads to other sites.
31 of 54
Describe the stage of introducing a new drug?
Computer modeling, Tested on human tissue, test on atleast two different mammels, tested on Humans
32 of 54
What is a depressant?
They decrease the activity of the brain, they slow down responses, and cause poor judgement.
33 of 54
What is a stimulant?
eg. Nicotine, caffeine. They increase the activity of the brain. Make you feel more alert and awake.
34 of 54
What are painkillers?
eg. aspirin, paracetamol. They reduce the number of painful stimuli at the nerve endings near an injury.
35 of 54
What are performance enhancers?
eg. anabolic steroids. They help build muscles and allow athletes to train harder.
36 of 54
What are hallucinogens?
eg.LSD. They disort what can be seen or herd by altering the pathways our brain sends meassages along.
37 of 54
What is a drug addiction?
When someone has a physical needs for something, if they don't get it they get withdrawal symptoms.
38 of 54
What is tolerance?
When the body gets used to it and ends up needing a higher dose.
39 of 54
What effects does alcohol have on the body?
Toxins may cause death of liver cells, dehydration which may damage other cells, poor judgement, poor balence, blurred vision.
40 of 54
What illnesses does smoking cause?
Heart disease, lung, throat, mouth, oesophageal cancer, smokers cough, low birth weight babies.
41 of 54
What do the differnt parts of the eye do?
Cornea- reflects light into the eye, Iris- controls how much light enters the pupil, Lens-refracts light foucusing it onto the retina, retina- light sensetive part covered in cones and rods which detect light
42 of 54
How does the eye focus on distant objects?
The ciliary muscle relaxes which allows the suspensory ligaments to pull tight.
43 of 54
How does the eye focus on close objects?
The Ciliary muscle pulls tight allowing the suspensary ligaments to relax.
44 of 54
What is Homeostasis?
Maintaining a constant internal environment.
45 of 54
What things need to be kept steady in the body?
Water levels,CO2 levles, body temperature
46 of 54
What is negative feedback?
Changes in the environment trigger a respose that counteracts the changes.
47 of 54
How does the brain control body temperature?
The brain has receptor that are sensetive to the blood temperature in your brain. The brain also receives impulses from the skin. The brain them initiates temperature control mechanisms.
48 of 54
How does your body lose heat?
Hairs lie flat, Sweat is produced, Blood vessels widen called vasodilation.
49 of 54
How does your body retain heat?
Hairs stand on end, little sweat produced, blood vessels constrict this is called vasco constriction, you shiver.
50 of 54
What does the body do when blood sugar levels are too high?
Pancreas releases insulin, the insuin make the liver store some of the glucose as glycogen.
51 of 54
What does the body do when blood sugar levels are too low?
Insulin is not produced, liver turns the glycogen back into glucose.
52 of 54
What is type 1 diabetes and, how can it be controlled?
When the pancreas produces little or no insulin. Can be partly controled by controlled diet but people also need to inject insulin a mealtimes, amount of insulin needed depends on diet and how active they are.
53 of 54
What is type 2 diabetes and how can it be controlled?
When the body is resistant to insulin. Is contolled by avoiding foods rich in simple sugars.
54 of 54

Other cards in this set

Card 2


What is meant by the term fit?


How well you can perform physical tasks

Card 3


What factors lead to an high blood pressure?


Preview of the front of card 3

Card 4


When blood pressure is at its highest it is called...


Preview of the front of card 4

Card 5


When blood pressure is at its lowest it is called...


Preview of the front of card 5
View more cards


Caitlin Ward


This is a really good set of cards and have helped with my final revision. I would say that there are lots of spelling mistakes and also some of the information is not correct so could you check if for other people as well as for your own notes? Thanks

Similar Biology resources:

See all Biology resources »See all Understanding ourselves resources »