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Biology OCR B > Cells of the Blood > Flashcards

Cells of the Blood Flashcards

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1
Q

How many litres of blood will a 70kg person have?

A

5.5 litres

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2
Q

What is blood made of? (PRWP)

A

Plasma, red blood cells, white blood cells, platelets.

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3
Q

What is the function of erythrocytes?

A

Oxygen from lungs to body and CO2 from tissues to lungs

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4
Q

Where do erythrocytes develop?

A

Bone marrow

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5
Q

What is the diameter of an erythrocyte?

A

6.2-8.2 micrometers

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6
Q

What is the thickest point of an erythrocyte?

A

2-2.5 micrometers

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7
Q

What is haemoglobin?

A

Iron-containing protein that can bind reversibly with oxygen to form oxyhaemoglobin

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8
Q

What is the process of new erythrocytes being produced called?

A

Erythropoiesis

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9
Q

What is the hormone that stimulates erythropoiesis

A

Erythropoietin

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10
Q

What are immature red blood cells known as?

A

Reticulocytes

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11
Q

What is the technical word for platelets?

A

Thrombocytes

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12
Q

What is the diameter of a thrombocyte?

A

2-3 micrometers

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13
Q

Where are thrombocytes produced?

A

Bone marrow and have no nucleus

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14
Q

On a stained blood smear, thrombocytes appear…

A

Dark purple

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15
Q

How long do thrombocytes live?

A

6-7 days

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16
Q

Give the technical name for white blood cells

A

Leucocytes

17
Q

Name the two types of white blood cells

A

Granulocytes and agranulocytes

18
Q

Define granulocytes

A

Contain granules (lysosomes) in their cytoplasm e.g. neutrophils

19
Q

Define agranulocytes

A

Absence of granules e.g. monocytes

20
Q

Function of neutrophils?

A

Defend against fungal/bacterial infections, engulf and break down bacteria in phagocytosis

21
Q

B lymphocytes produce

A

Antibodies

22
Q

Helper T cells

A

Coordinate the immune response

23
Q

Cytotoxic T cells

A

Destroy viruses

24
Q

What do monocytes do?

A

Carry out phagocytosis

25
Q

Macrophages:

A

remove dead cell debris and attack microorganisms, found in the lungs and liver.

26
Q

Monocytes are able to:

A

replace their lysosomes.

Biology OCR B (8 decks)

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