Flashcards in Blood Deck (16):
1
Name the 3 groups of cells found in the blood
Erythrocytes, leukocytes and thrombocytes ( platelets).
2
Name 5 white blood cells present in the blood, and state the main function of each
Neutrophils- phagocytise bacteria
Eosinophils- kill parasitic worms
Basophils- release histamine, heparin anticoagulant
Lymphocytes- amount immune response- direct cell attack or antibodies
Monocytes- develop into macrophages
3
What is the sequence of events that prevents the loss of blood from blood vessels?
Haemostasis
4
What is the most abundant plasma protein?
Albumin
5
What are the 3 stages of Haemostasis?
1. Vascular spasms- vessel/capillaries constrict, vasoconstriction
2. Platelet plug formation- platelets adhere, release chemicals that make other platelets sticky, plug forms.
3. Fibrin forms a mesh- traps RBCs and platelets, forming clot.
6
What is the fluid portion of the blood?
Plasma
7
What is the red pigment in blood and what is it's function?
Haemoglobin.
It's function is to bind iron and oxygen in blood.
8
What is the lifespan of erythrocytes?
120 days
9
What does the intrinsic conduction system consist of?
Cardiac cells that initiate and distribute a wave of electricity throughout the heart.
10
Where and how is iron stored in the body?
Liver, also in haemoglobin and ferritin-proteins in liver.
11
What is a characteristic of anaemia?
A lack of intrinsic factor, which leads to a deficiency in vitamin B12 and formation of large pale cells called macrocytes.
12
How many litres of blood due most adults have?
5-6 litres
13
Define the terms End Diastolic Volume and End Systolic Volume?
EDV= the amount of blood that collects in a ventricle during diastole.
ESV= the volume of blood remaining in a ventricle after it has contracted.
14
Define cardiac output?
Amount of blood pumped by each side of the heart in 1 minute.
15
Define stroke volume?
Volume of blood pumped by each ventricle in one contraction.
16