1.1.8 - Blood Clotting

Question 1

What Does Blood Clotting Do?
(3 Points)

Answer 1

~ Prevent excess loss of blood.

~ Prevents the entry of pathogens.

~ Provides a barrier / scab.

Question 2

Describe The Steps That Occur In Thrombosis
(5 Points)

Answer 2

~ Thromboplastin is released from the damaged blood vessel.

~ Thromboplastin and calcium ions from the plasma trigger the conversion of soluble prothrombin protein into the enzyme thrombin.

~ Thrombin then catalyses the conversion of the soluble protein fibrinogen to the insoluble protein fibrin.

~ The fibrin fibres then form a mesh and tangle together which then causes platelets and red blood cells get trapped in.

~ Blood clot is then formed.

Question 3

What Is A Stroke?

Answer 3

A rapid loss of brain function, due to the disruption in the blood supply to the brain.

Question 4

What Is A Stroke Caused By?

Answer 4

Caused by a blood clot in an artery leading to the brain, reducing the amount of blood and oxygen that can reach the brain.

Question 5

How Can Blood Clots Cause Heart Attacks?
(2 Points)

Answer 5

~ The coronary arteries become blocked by a blood clot, meaning that an area of the heart muscle will be cut off from its blood supply, no oxygen would be received.

~ Causing a myocardial infarction.

Question 6

What Is Another Word For A Heart Attack?

Answer 6

Myocardial infarction.

Question 7

What Is Coronary Heart Disease Caused By?

Answer 7

By the formation of atheroma’s and blood clots in the coronary arteries.

Question 8

What Are Symptoms Of A Heart Attack?
(3 Points)

Answer 8

~ Chest pain.

~ Shortness of breath.

~ Sweating.

Question 9

When Does Complete Heart Failure Occur?

Answer 9

When large areas of the heart are affected by blood clots.

Question 10

What Is Deep Vein Thrombosis?
(3 Points)

Answer 10

~ Occurs when a blood clot forms deep inside the body.

~ Common in veins in the legs.

~ Caused by prolonged inactivity, old age and some medications.