Tissues - blood

Question 1

What type of tissue is blood?

Answer 1

Connective tissue

Question 2

What 4 things is the blood made up of?

Answer 2

Plasma
Red blood Cells
Thrombocytes
WBC’s

Question 3

What is an erythrocyte?

Answer 3

A red blood cell

Question 4

What are thrombocytes?

Answer 4

Platelets

Question 5

What is plasma?

Answer 5

Mainly water, some carried dissolved gasses, and proteins/plasma-proteins to help blood clotting/transport/defence against invading organisms

Question 6

What is the matrix?

Answer 6

The background material in which various types of cells lie

Question 7

What are RBC’s/Erythrocytes?

Answer 7

Small cells with elastic membrane which are oval and biconcave - they distort to travel through small capillaries, have no nucleus and are packed with haemoglobin

Question 8

What are the two differing bloods flowing throughout the body?

Answer 8

Oxygenated blood (arterial blood)
Deoxygenated blood (venous blood)

Question 9

What are the three types of white blood cells?

Answer 9

Neutrophils
Eosinophils
Basophils

Question 10

How can we identify wbc’s physically?

Answer 10

They contain granules in their cytoplasm

Question 11

Which two wbc’s are phagocytic and what does this mean?

Answer 11

Neutrophils and Eosinophils - capable of changing their shape and engulfing foreign bodies (e.g. bacteria/carbon particles)

Question 12

What do neutrophils do?

Answer 12

They kill and digest bacteria and fungi - most numerous wbc and the first line of defence

Question 13

What do Eosinophils do?

Answer 13

They attack and kill parasites/cancer cells - also help with allergic responses

Question 14

What do basophils do?

Answer 14

Prevent blood clotting, they sound an alarm when infectious agents invade the blood, help bring about allergic reactions (e.g secrete chemicals like histamine - a marker of allergic disease)

Question 15

What are lympocytes?

Answer 15

Small wbc’s which assist in production of antibodies - made in the bone marrow, some enter the blood stream and some the lymphatic system

Question 16

What is the mechanism of lymphocytes?

Answer 16

They assist in making antibodies which neutralise the antigens found on the surface of pathogens, preventing the microbe from multiplying

Question 17

What are monocytes?

Answer 17

Wbc that ingests harmful foreign material, can travel to site of infection and begin phagocytosing pathogen

Question 18

Structure of lymphocytes?

Answer 18

Smaller wbc than granulocytes - round nuclei and clear cytoplasm

Question 19

What are the Granulocytes?

Answer 19

The three types of wbc known for containing granules in their cytoplasm and having varying shapes of nuclei, usually lobed into three segments

Question 20

Structure of Monocytes?

Answer 20

Larger wbc than lymphocytes - large round nuclei and clear nuclei

Question 21

What are thrombocytes also known as and what do they do?

Answer 21

Platelets - they’re products of much larger cells - play a big role in blood clotting

Question 22

What are leuocytes?

Answer 22

Larger nucleated cells - less numerous, which can alter their cell shape

• Granulocytes
• lymphocytes
• monocytes