3 Blood And Blood Cells Flashcards Preview

MCD Introduction To Cells > 3 Blood And Blood Cells > Flashcards

Flashcards in 3 Blood And Blood Cells Deck (15)
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1
Q

Define haemostasis.

A

Process to decrease bleeding (form clot)

2
Q

What determines blood group?

A

Molecules on RBC surface

3
Q

Define cooperative binding.

A

Oxygen binds and opens up structure of Hb

4
Q

Microcytic anaemia. Cause?

A

Small mcv

Slow and chronic blood loss and of iron

Eg menstruation

5
Q

Macrocytic anaemia.

A

Large mcv

Reduced division of rbc so fewer and larger

Folic acid deficiency in pregnancy

6
Q

Define humoral immunity.

A

Antibody mediated

7
Q

Polymorphonuclear granulocytes.

A

First on scene

Phagocytic

Release inflammatory mediators eg chemotaxins and digestive E

8
Q

B Lymphocytes.

A

Antibody antigen reactions

Agglutination
Neutralisation
Opsonisation

Form memory cells

11
Q

What do chemotaxins attract?

A

Macrophages

12
Q

Monocytes.

A

Become macrophages in tissue
Phagocytic
Secret inflammatory mediators
Stimulate angiogenesis (vessel growth into repairing tissue)

13
Q

Platelets.

A

Derive from megakaryocytes
No nucleus
Many organelles
Possess surface receptors to collagen of granules for activation eg coagulation cascade in clot/thrombus formation

14
Q

Plasma

A

Fluid component that carries solids

Exert osmotic pressure to maintain blood volume

15
Q

Serum

A

Plasma with proteins removed

16
Q

What are memory cells?

A

Long lived B lymphocytes

17
Q

B or T produced antibodies?

A

B