Lecture 11 !!! Flashcards Preview

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Flashcards in Lecture 11 !!! Deck (10)
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1

What are the components of blood plasma?

-water 90% of plasma is water
-electrolytes
-nutrients
-wastes
-hormones
-plasma proteins= actual function

2

What are the proteins in blood plasma?

-albumins
-globulins (alpha, beta and gamma)
-fibrinogen

3

What is the function of albumins in the blood plasma?

-most abundant plasma protein
-bind many substances for transport through the plasma and contribute most to the colloid osmotic pressure

4

What is the function of fibrinogen in the blood plasma?

key factor in the blood clotting process

5

What is the function of globulins in the blood plasma?

-transporters- specific alpha and beta globulins bind and transport substances in the plasma
-clotting agents- many of the factors involved in blood clotting are alpha or beta globulins
-inactivators- inactive proteins that are precursors of hormones and need to be activated by a signal are alpha globulins
-immune effectors- gamma globulins are the immunoglobulins(antibodies) which are crucial in defense mechanism

6

What is the shape and internal structure of the red blood cells?

biconcave disk= bigger surface to volume area= can carry more oxygen
-no nucleus

7

What do red blood cells transport?

heamoglobin= which carries oxygen
CO2
H+
NO
also act as a buffer against changes in pH due to carbonic anyhydrase
-buffer

8

Where are red blood cells broken down?

in the spleen/ liver
-spleen is also the reservoir of red blood cells for when they're needed in exercise etc

9

How long is a red blood cell's life and why?

-quite short varies across species 25-160 days

10

Where are blood cells made?

-bone marrow
-has pluripotent cells that divide and produce blood cells
-in red blood cells get rid of intracell