Chap 3 - Skin & Blood.txt
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What are the layers of the Skin?
- Subcutaneous tissue
What is the Epidermis?
Outermost layer of the skin comprised of dead or dying cells
What is the Sebum?
Fatty secretion of the sebaceous gland that helps keep skin pliable & waterproof
What is the Dermis?
True skin (aka. corium); layer of tissue producing the epidermis & housing the structures , blood vessels & nerves
What are the Sebaceous Glands?
Glands w/in the dermis secreting sebum
What are the Sudoriferous Glands?
Glands w/in the dermis that secrete sweat
What is Subcutaneous Tissue?
Body layer beneath the dermis
What is the Hematopoietic System?
Production & development of blood cells; consists of bone marrow, liver, spleen, kidneys, & blood
What is a Pluripotent Stem Cell?
Cell from which the various types of blood cells can form
What is Hematopoiesis?
Process thru which pluripotent stem cells differentiate into various types of blood cells
What is Erythropoietin?
Hormone responsible for RBC production
What are the components of Blood?
- Formed elements
What is Plasma?
Thick, pale yellow fluid that makes up the liquid part of the blood
What is an Erythrocyte?
Red Blood Cell (RBC)
What is Hemoglobin?
O2-bearing molecule in RBCs; made up of iron-rich red pigment called heme & protein called globin
What is PO2?
Partial pressure of O2; pressure exerted by a given component of a gas containing several components
What is PCO2?
Partial pressure of carbon dioxide
What is Bohr Effect?
Phenomenon in which a decrease in PCO2 causes an increase in the quantity of O2 that binds w/ the hemoglobin
What is 2,3-diphosphoglycerate?
Chemical in RBCs that affect hemoglobin's affinity for O2
What is Erythropoiesis?
Process of producing RBCs
What is hemolysis?
Destruction of RBCs
What is Sequestration?
Trapping of RBCs by an organ
What is Hemocrit?
The packed cell volume of RBCs per unit of blood
What is a Leukocyte?
White Blood Cell (WBC)
What is Chemotaxis?
Movement of WBCs in response to chemical signals
What is Phagocytosis?
Process in which WBCs engulf & destroy an invader
What is Leukopoiesis?
Process thru which stem cells differentiate into the WBCs immature forms
What are the '3' types of WBC Blasts?
What is an Autoimmune Disease?
Condition in which the body makes antibodies against its own tissues
What is an Inflammatory Process?
Nonspecific defense mechanism that wards off damage from microorganisms or trauma
What is a Thrombocyte?
What is Hemostasis?
Combined mechanisms that work to prevent or control blood loss
What is Fibrinolysis?
Process thru which plasmin dismantles a blood clot
What is Thrombosis?
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