Describe the function of platelets.Multiple ChoiceReduce blood loss from damaged blood vesselsTransport lipids and some hormones through the circulationCarry oxygen and carbon dioxidePhagocytosis of pathogens and foreign debris

What is a function of platelets?Multiple ChoiceThey carry oxygen and carbon dioxide.They reduce blood loss from damaged blood vessels.They phagocytize pathogens and foreign debris.They transport lipids and some hormones through the circulation

What is the function of platelets?

Describe the role of platelets. Explain the dangers a person may face if hesuffers from an illness which results in the drop in platelet count

Describe the function of red blood cells, white blood cells and platelets.Red blood cells are responsible for carrying oxygen. White blood cells fight bacterial infections. Plateletsform clots to close cuts.2 Use diagrams to describe how the three blood vessel types differ in their structure and function.Students’ diagrams should contain the following:Arteries: the largest blood vessel, with thick muscular walls designed to cope with high pressure. Theytravel away from the heart.Veins: similar in size to arteries but without much muscle in the walls. They carry blood back to the heartand contain one-way valves.Capillaries: the smallest blood vessel. They connect arterioles (artery branches) and venules (veinbranches) and enable the exchange of water, oxygen and nutrients between the blood and surroundingtissues.3 Use Figure 4 to describe the path a red blood cell takes as it moves through the body from the heart.The path of the blood through the body from the heart is artery, arteriole, capillaries, venules, vein, thenback to the heart.4 Rewrite your answer to question 3, adding the names of the veins and the arteries involved.The path of the blood through the body from the heart (with the names of the arteries and veins) isaorta artery, arteriole, capillaries, venules, vein, vena cava, heart.5 Identify the body system that supplies the nutrients that the circulatory system moves around thebody.Digestive systemApply and analyse6 Instead of the blood travelling directly from the lungs to the rest of the body, the blood returns to theheart first. Explain one advantage of the blood returning to the heart before moving around the body.The blood returns to the heart first instead of travelling directly from the lungs to the body because theblood now contains oxygen and the heart muscle itself needs oxygen so that it can keep pumping.

In initiating hemostasis, what typically activates platelets?Multiple ChoiceLow oxygen concentrationsProduction of factor XConversion of fibrinogen to fibrinExposed collagen