Blood - Circulatory System 1 Flashcards
1
Q
Composition of blood
A
55% plasma
45% cells suspended within
2
Q
What does blood transport?
A
- hormones (endocrines)
- heat
- antibodies
- clotting factors
- nutrients
- excretory products
- oxygen and carbon dioxide
3
Q
Composition of plasma
A
90% water
10% dissolved substances
4
Q
What are the dissolved substances?
A
- plasma proteins
- transported substances
5
Q
What are the plasma proteins?
A
- albumin
- globulins
- fibrinogen
- prothrombin
- serum
6
Q
Albumin
A
- Formed in liver
- Helps maintain viscosity of blood – ensuring
that the blood is not too thin and moving
through vessels too quickly - therefore
maintains blood pressure
7
Q
Globulins
A
- Formed in liver or lymphoid tissue
- Produced during immune response
- Transports hormones and minerals
8
Q
Fibrinogen
A
- produced in liver - necessary for haemostasis
9
Q
Prothrombin
A
- essential substance in blood coagulation
- vitamin k is essential for its formation
10
Q
Serum
A
- plasma from which clotting factors have been removed
11
Q
What are the transported substances
A
- enzymes
- hormones
- nutrients
- organic waste products
- dissolved gases
- dissolved inorganic salts
12
Q
Enzymes
A
- chemical substances which can produce or speed up changes in other substances
13
Q
Hormones
A
Chemical substances from endocrine glands
14
Q
Nutrients
A
- amino acids
- glucose
- fatty acids
- glycerol
- vitamins
15
Q
Organic waste products
A
Principally urea and uric acid
