BLOOD 3

Learning outcomes for lesson 3 in blood series: 

- Not to get stuck in AB0 blood types stuff

- Clearly and concisely summarise facts and describe AB0 blood typing

Exercise 11: Answer questions after watching video https://goo.gl/CGHsDz

1. Let's say your name is Ivan, you've survived a shipwreck and you're stranded on a desert island. You happen to have been stranded with a medical doctor that has a limited stock of medical supplies. One of your shipmates is in desperate need of a blood transfusion but doesn't know his blood type. You do know your blood type. How could you type his blood with your knowledge and limited medical supplies?
2. There have been books written about how blood type affects personality or body shape. Knowing that blood type is determined by antigens on erythrocytes, are these claims scientifically valid? 

Exercise 12. Step one (individual work): Complete the table below by putting symbol OK in the correct place.

Recipient	Donor
	0-	0+	A-	A+	B-	B+	AB-	AB+
0-
0+
A-
A+
B-
B+
AB-
AB+

Recipient - person who receives blood.

Donor - person who donates his or her blood.

Step two (pair work): Compare your results with the correct answers shown by your teacher and discuss them with your partner.

Step three (in group of 3 or 4): Work in group to answer these questions:

1. Who can we call the universal donor? Explain.
2. Who can we call the universal recipient? Explain.

Exercise 13. Step one (individual work): The following notes were written carelessly. Consequently they are full of content errors! The number of errors per sentence is indicated in parentheses (brackets). Please rewrite sentences where mistakes made making the necessary corrections.

In transfusion reactions, antibodies attach to antigens on the surfaces of erythrocytes and cause agglutination. ABO blood group antigens are called 0, A and B (1). People with type A blood have 0 antigens on their erythrocytes, whereas those with type B blood have A antigens (2). Those with AB blood have both A and B antigens, and those with type O blood have A or B antigens (1). The blood plasma contains preformed antibodies against the antigens not present on a person’s erythrocytes. 

Step two (work in pairs): Read the story and answer the question.

Following a motor vehicle accident, a patient is rushed to the emergency department with multiple injuries, causing severe bleeding. The patient’s condition is critical, and there is no time for determining his blood type. What type of blood is transfused and why?