Virus
What is the inside of the virus?
genetic material (DNA)
Bacteria reproduce by splitting into two. What is this process called?
binary fission
How does the skin protect the body from infection?
It is a physical barrier that keeps microorganisms out.
In which direction do arteries carry blood?
from the heart to the body
In digestion, what liquid starts to break down food?
Saliva.
What parts are common to all viruses?
DNA and a protein coat
What are the chemicals that destroy bacteria or make them weak?
antibiotics
Do antibiotics help with an infection from a virus?
No.
When newly oxygenated blood is pushed by the left ventricle, where does it go?
to the body
In digestion, where does food go after the esophagus?
Stomach.
What is the purpose of the protein coat on the virus?
to protect the genetic material (DNA) inside the virus
When is antibiotic resistance created?
When a person takes antibiotics when they are not needed.
What starts the inflammatory response?
microorganisms enter the body
What is the path of blood in the body?
heart, lung, heart, body
What are the two parts of digestion?
Breaking down food and absorbing nutrients.
How does a bacteriophage virus reproduce?
by injecting genetic material (DNA) into a host
What are antibiotics?
chemicals that destroy bacteria or make them weak
What do white blood cells do?
destroy infected cells
What function do valves have in veins?
They prevent blood from going in the wrong direction.
What is the purpose of the rugae (folds) in the small intestine?
They increase the area where nutrients can be absorbed.
Why are viruses not considered living things? (Name four reasons)
They cannot move, metabolize, reproduce and develop on their own.
What do saprophytes, a type of bacteria, eat?
Dead things.
Why is the second line of defense named this way?
It activates when the first line of defense fails.
Blood comes from the lungs and goes into the heart. What is the first heart chamber that blood goes into?
left atrium.
Which of these is an accessory digestive organ and does not have direct contact with food?
Pancreas.