Question

QUESTION 14

Individuals who are Rh+ _______.

		a. Have Rh antigens that are positively charged whereas individuals who are Rh- have Rh antigens that are negatively charged
		b. Will mount an immune response against the Rh antigens
		c. Have Rh antigens (agglutinogens) on their blood cells

QUESTION 15

Fred's blood was determined to be AB positive. What does this mean?

		a. His blood contains antibodies against both the A and B antigens.
		b.There are no antibodies against the A, B, or Rh antigens in his blood.
		c.His erythrocytes lack the Rh factor.
		He can only receive blood from a donor who is AB positive.

QUESTION 16

Platelets ________.

     

		a. are the precursors of leukocytes
b.		have a life span of about 120 days
c.		stick to the damaged area of a blood vessel and help seal the break
d.		Are also called reticulocytes.

QUESTION 17

Which of the following is needed to form blood clots?

   

		a.calcium
		b. tissue plasminogen activator
		c. plasmin
		d. monocytes

QUESTION 18

Both the intrinsic and the extrinsic clotting pathways lead to the conversion of _______.

		prothrombin to thrombin
		plasmin to plasminogen
		thrombocytes to platelets
		collagen to fibrin

Answer 1

14. C

The Rh+ individual has Rh antigen on their red blood cell surface.

15. B.

There is no antibody against A, B or O . He can receive blood from all the other plus AB blood groups.

16. C.

Platelets stick to the damaged area of blood vessels and help seal the break.

17. A

calcium is required to form blood clots.

B and C are required in degradation of blood clots.

Monocytes are leucocyte,not related to blood clot at all.

18. A.

Both the instrinsic pathways lead to conversion of prothrombin to thrombin.