Bio 255 Exam 1 Exam Verified Answers 2024
Components of whole blood
~Erythrocytes-RBS
~Leukocytes-WBC
~Plasma
Plasma is made of?
Water, proteins, nutrients, electrolytes, nitrogenous wastes, hormones and gases
Components of form elements
~RBC
~Platelets
~WBC-granulocytes and agran...
Hemoglobin
~protein that carries O2 in blood,
~Iron allows binding of O2
~ heme carries 4 O2
What cell type are RBC broken down by?
Macrophages
What is first broken down in RBC?
Heme and Globin
Steps of RBC break down
1. cells are broken down by macrophages
2.Heme and globin separate
3. globin is made into an amino acid
4. Iron is taken from heme, attaches to transferrin and delivered to liver
5. iron then detaches and reattached to ferritin and stored
6. When needed the iron is pushed back into the blood stream where it is used for formation of new
RBCs
7. Heme is converted into bilirubin and transported to liver
8. by the liver heme is released into bile moving from small to large intestine
9. this then becomes urobilinogen then is released in urine and feces
Production of RBCs is called?
Erythropoiesis
What hormone from the kidneys is required for erythropoiesis?
erythropoietin (this hormone increases when oxygen drops)
When WBCs leave the blood stream to sites of invasion is called?
emigration ( most commonly conducted by neutrophils)
What do high levels of white blood cells indicate?
body is fending off pathogens and infectious microorganisms
Platelets come from what what cell?
megakaryocyte
Platelet functions
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