BN507 MODULE 3 EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED

BN507 MODULE 3 EXAM QUESTIONS AND ANSWERS

WITH COMPLETE SOLUTIONS VERIFIED


Blood

type of connective tissue composed of plasma and formed elements

Functions of blood

1. Transportation of important substances

2. Regulation of body temperature, fluid volume and pH balance

3. Prevention of blood loss and infection

Formed elements

1. red blood cells

2. white blood cells

3. platelets

Red blood cells

deliver oxygen to the tissues of the body

White blood cells

immune response

Platelets

form clots to prevent bleeding

Haematopoesis

production of all formed elements

Haemoglobin

, binds oxygen for transportation through the blood

What is haemoglobin composed of?

- a globin protein (2 alpha chains and 2 beta chains)

- red haem pigment

Red blood cell life cycle

120 days

Red blood cell production

erythropoiesis

What stimulates the production of red blood cells

erythropoietin hormone secreted by the kidneys

Requirements for red blood cell production

1. all macronutrients

2. iron

3. vitamin B12

4. folic acid

Blood groups

based on the presence or absence of antigens

What are the most common blood groups?

1. ABO

2. Rh

Location of the heart

within the mediastinum enclosed within the pericardium

Layers of the pericardium