Exam #3, Quiz 1 Flashcards
What does cells primarily reply on?
Oxygen
What is the normal body pH?
7.35-7.45
What are the four primary functions of blood? x4
- Transport oxygen and nutrients to all tissues
- Remove wastage products of cellular metabolism?
- Active in the bod’s defenses/ immune system
- Help maintain body homeostasis
What are the two separate circulatory systems and what does each do?
- Pulmonary circulation: allows the exchange of oxygen and carbon dioxide in the lungs
- Systemic circulation provides for the exchange of nutrients and waste between the blood ad the cells throughout the body
What do arteries do?
Transport blood back to the heart.
Blood flows
Arteries -> Arterioles -> Capillaries -> Venules -> Veins _> back to the heart -> lungs
What is in the larger veins that help push blood towards the heart
Valves
Why does blood flow in the wrings depend on?
Skeletal muscle action, respiratory movements, and gravity
What are the three layers of walls of arteries and veins made of?
- Inner layer: tunica intima, an endothelial layer
- Middle layer: Tunica media, a layer of smooth muscle that controls the diameter of lumen size (diameter) of the blood vessels
- Outer layer: tunica adventitious, or external, connective tissue later that contains elastic and collagen fibers
Capillary walls have a single endothelial later allows for easier transport into tissues
What is hematocrit levels and what do they do?
Number of cells in the blood
Proportion of cells in blood
Viscosity, thickness, of blood
Males average 42-52%
Females averages 37-48%
Elevated HCT- Dehydration of excess cells
Decrease HCT- blood loss or anemia
What is plasma?
Yellowish fluid remaining after cells are removed
What is plasma protein?
Albumin- maintains osmotic pressure. (Keeps fluid where its suppose to be)
Globulins and antibodies- immune response
Fibrinogen- clotting
Where do blood cells originate?
Red bone marrow
What are myeloid stem cells?
Precursors for RBCs, platelets, and granulocytes (Eosinophils, Basophils, and Neutrophils)
What are Lymphoid stem cells?
Precursors for B lymphocytes, T lymphocytes, and natural killer cells
What is erythropoietin?
From the kidneys stimulates erythrocytes, rbc production. (Hematopoisesis) in response to tissue hypoxia
What does adequate RBC production and maturation depend on?
Amino acids, iron, Vitamin B12 and B6, Folic acid
When does hemoglobin become fully saturated?
With oxygen in the lungs
What color is oxyhemoglobin?
Bright red
Also is a good indicator for distinguishing the difference from arterial blood from venous blood
What happens as blood circulates through the body?
Oxygen dissociates from hemoglobin to enter tissues
Deoxygenated blood is dark blush’s red in color
Found in venous blood
What can oxygen easily be displaced from hemoglobin by?
Carbon monoxide, which binds tightly to the iron in place of oxygen, causing a fatal hypoxia, takes all four oxygen receptor sites
CO2 Poisoning can be recognized by the bright cherry red color in the lips and face
What is hemolysis of erythrocytes?
Excessive hemolysis or deconstruction of RBCs, as with hemolytic anemias, may cause elevated serum bilirubin levels»_space;> jaundice
What is leukopoiesis?
The production of WBCs, it is stimulated by colony stimulating CSFs produced by cells such as macrophages and T lymphocytes
What are lymphocytes? (B and T cells)
Immune response
What are neutrophils?
First responders to tissue damage
What are immature neutrophils called?
Band, immature
What does bands do? Also what is the phrase we use when we indicate this?
Often increase in number in response to bacterial infection
Shift to the left (shift as in bands)
What are basophils?
Become mast cells that release histamine
What are eosinophils?
Active in allergic reactions and parasitic infections: asthmatics
What are monocytes?
Become macrophages active in phagocytosis
Also known as pac man cells
What are the three steps in hemostasis?
(Thrombocytes, platelets, essential part of the blood clotting process)
- Immediate response of a blood vessel to injury is vasoconstriction or vascular spasm
- Thrombocytes, platelets, adhere to the underlying tissue at the site of injury and can form a platelet plug in the vessel if its small
- It its a larger vessel, platelets can trigger the clotting, coagulation cascade.
Where are clotting factors produced primarily?
Liver
What is Vitamin K required for?
Synthesis of most clotting factors, especially prothrombin
Calcium
Also essential in the clotting factor
What helps with the clotting cascade?
Applying pressure, cold application, or thrombin solution can help speed up clotting
What happens if you have liver issues with the clotting cascade?
No clotting, increase bruising
Human Blood Clotting: Chart
Starts:
Damage blood vessel: injury to vessel lining triggers the release of clotting factors
->
Clotting Factors
->
Prothrombin ->Thrombin. -> Fibrinogen (soluble). -> Fibrin. (Insoluble) ->
1. Activated platelet: Formation of platelet plug, vasoconstriction limits blood flow and platelets form a sticky blue
2. Fibrin Strand - Blood Clot: Development of Clot: Fibrin strands adhere to the lug to form an insoluble clot
What are blood types determined by potencies of?
Specific antigens on surface of RBCs
What blood type is the universal donor?
Type O-
What blood type is the universal recipient?
AB
What is important about an RH factor?
May cause blood incompatibility in the mother if RH negative and the fetus us RH positive
Why can plasma be administered without risk of a reaction?
Because it does not have antigens or antibodies?
What are transfusion reactions, clinical manifestations?
Base line vitals, always needed
Feeling of warmth in that involved vein, flushed face, headache, fever and chills, pain in the chest and abdomen, decrease blood pressure, rapid pulse
What is a CBC?
Overall cell count
What is a CBC with differential?
Closed look at percentages f the different EBCs; can help identify diagnosis— separate all cells out
What is a blood smear?
Looks at cell structures (anemias), cell shape, size, and color
What is hemoglobin and hematocrit anemias?
Low hemoglobin enemia
What is reticulocyte?
Immature RBC Production, sickle cell
What is bone marrow aspiration and biopsy?
Bone marrow function, cancer test
What are serum levels?
Iron, Vitamin B12, folic acid, glucose
What is a PTT, INR?
Coagulation indicators, coagulation - warfarin/cumiden
What are the four treatments for low cell count?
- Whole blood, Packed RBCS, Platelets- replace cells or platelets
- Plasma products or colloid infusions-expand volume and balance osmotic pressure
- Epoetin (made in kidneys) - simulates production of red bloodcells: sympathetic eurothropostein
- Bone marrow or stem cell transplants treatment of some cancers and immunodeficiencies specialties