Other than leukocytes, what are the other things that act in our immune system?
skin, mucus, cilia, stomach acid, etc.
300
Explain how bacteria, virus and fungus multiply
Bacteria (asexual binary fission),
Virus (uses living host cell to make copies),
Fungus, uses a host (living or not) as food in order to spread hyphae and spores
300
The first White blood cell to meet pathogens are called...
Macrophages
300
These are the 4 blood vessels lesding to and from the heart.
aorta, pulmonary vein, pulmonary artery and the vena cavae (superior and inferior)
300
If I put a piece of lung in water, it will...
float, because all the alveoli are filled with air
300
If you have AB+ blood, who can you get blood from, adn who can you donate to?
receive from anyone, can give only to other ABs
400
what is is called when a fungus and a plant work together to thrive?
Mycorrhizae
400
A vaccine is different from variolation because...
Variolation means getting a small dose of a sickness to become innume to that sickness. Vaccine is getting a small dose of a similar but milder sicknesses in order to fight off Another disease.
400
As you exercise, your heart pumps faster because...
Your body is using a higher rate of oxygen and producing CO2 faster, so the heart has to supply more oxygen, and Clean up more CO2)
400
smoking affects the lungs by
damaging cilia, covering alveoli in tar
400
What do platelets do?
When you have a cut, they build a wall of tissue that acts like a dam, stopping the bleeding, until new skin can grow.
500
Give a reason for and against why virus are living (or nto living)
not living - can not reproduce on its own, doesn't eat
living - has dna, mutates, makes copies
500
Antibiotic resistance is...
Antibiotics do not Always kill all of the bacteria, and the remaining bacteria are genetically able to withstand antibiotics, so they multiply more (less competition from other bacteria). So new antibiotics are needed, but the same process happens over and over again.
500
The area of the heart which is affecte din a heart attack is...
Corronoary blood vessels (the blood vessels that supply blood only to the heart and not the rest of the body.
500
When the diaphragm contracts, the lungs...
expand
500
What is the purpose of plasma?
Holds water, nutrients, keeps blood from getting too thick