quiz 7 Flashcards
What is mitosis?
The division of one cell to produce two identical clones
What does a vaccination contain?
A small quantity of dead or inactive forms of a pathogen.
Why do nerve cells have dendrites?
To connect to other cells
What is the function of the cell wall?
It strengthens and supports the cell
What are prokaryotic cells?
Cells without a nucleus
Describe some adaptations that alveoli have to make them an efficient gas exchange surface.
rich capillary network, very thin walls (one cell thick)
Give two adaptations of a root hair cell
Large surface area, no chloroplasts
How does the contents of a vaccine prevent future infection?
it stimulates the white blood cells to produce antibodies. If the same pathogen re-enters the body the white blood cells respond quickly to produce more of the correct antibodies quickly, preventing infection.
Name the blood vessel by which blood leaves to the rest of the body from the heart
Aorta
What gas diffuses out of the bloodstream into the lungs?
Carbon dioxide
Which blood vessels have thick walls containing muscle tissue and elastic fibres?
Arteries
What are the symptoms of athlete’s foot?
Damaged skin and toe nails
What are the four types of microorganisms that can cause disease?
bacteria, viruses, fungi, protists
What do platelets do?
Help clot the blood at wound sites.
What is mitosis used for?
Growth, repair and asexual reproduction
