6.4- White blood cells (WBCs)
Call Kai
Learn
Practice Test
Spaced Repetition
Match
Flashcards
Knowt Play1/21
There's no tags or description
Looks like no tags are added yet.
Name | Mastery | Learn | Test | Matching | Spaced | Call with Kai |
|---|
No analytics yet
Send a link to your students to track their progress
22 Terms
What are WBCs also called?
Leukocytes
What is the role of white blood cells (WBCs)?
They protect the body against infections and foreign invaders
Where can white blood cells be found?
In the blood, lymphatic system, and body tissues.
Where do WBCs go during an infection?
They move to the site of infection in body tissues.
What percentage of blood is made up of white blood cells?
Less than 1%
What kind of nucleus do white blood cells have?
A large nucleus.
What special feature do some white blood cells’ nuclei have?
They are multi-lobed.
Why is a multi-lobed nucleus useful in white blood cells?
It helps them squeeze through blood vessel walls.
: How big are white blood cells?
About 7-30μm in size.
How do white blood cells compare in size to red blood cells?
They are larger than red blood cells.
What are the five types of white blood cells?
Neutrophils, lymphocytes, monocytes, eosinophils, and basophils.
How do white blood cells tell the difference between body cells and invaders?
They recognise specific protein markers called antigens.
What are self-antigens?
Protein markers on your own cells that WBCs recognise as “self” and do not attack.
What do WBCs do when they detect foreign antigens?
They recognise them as foreign and target them for destruction.
What is the role of lymphocytes?
They help the immune system by detecting and responding to foreign invaders.
Where do lymphocytes mainly live?
In the lymphatic system.
What do lymphocytes do when they detect a foreign cell?
They multiply (clone themselves) and produce antibodies.
What do antibodies do?
They bind to antigens on foreign invaders.
What happens when antibodies attach to foreign invaders?
They cause them to clump together and slow down.
How do antibodies help white blood cells destroy invaders?
They mark them so phagocytes can find and destroy them.
Which organelle is found in large amounts in phagocytic white blood cells?
Lysosomes
Why do phagocytic white blood cells have many lysosomes?
Because lysosomes digest and break down pathogens.