Understanding Organisms Flashcards
What is the differences between 1st class and 2nd proteins?
1st class proteins are animal proteins and 2nd class proteins are plant proteins because they don’t contain all the essential amino acids
What are the key roles of white blood cells?
- Ingest pathogens and destroy them
- Produce antibodies to destroy pathogens
- Produce antitoxins that neutralise the toxins release by pathogens
What are the key harmful substances in cigarettes?
Nicotine
Carbon monoxide
Tar
Particulates
What does the central nervous system consist of?
The brain and the spinal cord
Name four infectious diseases and identify the microbe that causes them?
Athlete’s foot- fungi
Cholera- bacteria
Flu- virus
Dysentery- Protozoa
Define what a drug is
Chemical that can alter the way the body works
How do drugs affect synapses?
By increasing the amount of transmitter chemical at some synapses and increasing the frequency of impulses along neurone 2 but it can block the electrical impulse
Do genetics or the environment have a bigger influence on the development of characteristics?
It’s hard to say which factor has a bigger influence, because they both do
What should the internal body temperature be?
37C
What five factors could you measure to help assess fitness?
- Strength
- Speed
- Stamina
- Agility
- Flexibility
Over what score is a BMI score a concern?
24.9
What things in a person’s lifestyle will affect raise blood pressure levels?
Smoking
Drinking too much alcohol
Being overweight
Being under lots of stress
Which gland in the brain detects the temperature of the blood?
Thyroid gland
Hypothalamus
How are gametes different to normal cells?
Gametes have half the number of chromosomes of body cells
If both parents are heterozygous, what is the percentage chance of developing cystic fibrosis?
25%
