OSSF: blood and bone marrow UPDATED
ACTUAL Exam Questions and CORRECT
Answers
general functions of blood - CORRECT ANSWER - carries oxygen, nutrients, hormones, etc.
helps eliminate CO2 and wastes
immune system
(WBCs use bloodstream as transport system, only present for a few hours or days at most)
how much is peripheral blood volume - CORRECT ANSWER - 9% of body weight
plasma composition - CORRECT ANSWER - 90% water and 10% solutes
what are low molecular weight molecules in blood - CORRECT ANSWER - glucose,
electrolytes (salt), urea
what are high molecular weight molecules in blood - CORRECT ANSWER - albumin,
clotting factors, Igs, enzymes, hormones, lipoproteins
blood composition - CORRECT ANSWER - low molecular weight substances are in
equilibrium with interstitial fluids
what does albumin do - CORRECT ANSWER - maintains oncotic pressure
holds fluid in vascular space
decreased albumin results in low oncotic pressure and edema/ascites
what is oncotic pressure - CORRECT ANSWER - The pressure created by the osmotic effects
of the solutes
, What is ascites? - CORRECT ANSWER - the accumulation of fluid in the peritoneal cavity,
causing abdominal swelling
serum vs plasma - CORRECT ANSWER - liquid part of blood, Serum is plasma without the
clotting factors (lower total protein than plasma)
hematopoiesis - CORRECT ANSWER - blood cell formation
occurs in adult bone marrow (medullary cavities)
where does hematopoiesis occur in mouse, ferret, hedgehog - CORRECT ANSWER -
extramedullary in spleen
where is red marrow located - CORRECT ANSWER - proximal ends of long bones
flat bones
Is red or yellow bone marrow active? - CORRECT ANSWER - red marrow
red bone marrow - CORRECT ANSWER - organized into cords of cells separated by
sinusoidal capillaries
supported by reticular CT
megakaryocytes sit next to sinuses and release platelets into the blood
other mature cells pass through endothelial cells into bloodstream
Differentiation - CORRECT ANSWER - process in which cells become specialized in
structure and function
Erythropoiesis - CORRECT ANSWER - production of red blood cells
ACTUAL Exam Questions and CORRECT
Answers
general functions of blood - CORRECT ANSWER - carries oxygen, nutrients, hormones, etc.
helps eliminate CO2 and wastes
immune system
(WBCs use bloodstream as transport system, only present for a few hours or days at most)
how much is peripheral blood volume - CORRECT ANSWER - 9% of body weight
plasma composition - CORRECT ANSWER - 90% water and 10% solutes
what are low molecular weight molecules in blood - CORRECT ANSWER - glucose,
electrolytes (salt), urea
what are high molecular weight molecules in blood - CORRECT ANSWER - albumin,
clotting factors, Igs, enzymes, hormones, lipoproteins
blood composition - CORRECT ANSWER - low molecular weight substances are in
equilibrium with interstitial fluids
what does albumin do - CORRECT ANSWER - maintains oncotic pressure
holds fluid in vascular space
decreased albumin results in low oncotic pressure and edema/ascites
what is oncotic pressure - CORRECT ANSWER - The pressure created by the osmotic effects
of the solutes
, What is ascites? - CORRECT ANSWER - the accumulation of fluid in the peritoneal cavity,
causing abdominal swelling
serum vs plasma - CORRECT ANSWER - liquid part of blood, Serum is plasma without the
clotting factors (lower total protein than plasma)
hematopoiesis - CORRECT ANSWER - blood cell formation
occurs in adult bone marrow (medullary cavities)
where does hematopoiesis occur in mouse, ferret, hedgehog - CORRECT ANSWER -
extramedullary in spleen
where is red marrow located - CORRECT ANSWER - proximal ends of long bones
flat bones
Is red or yellow bone marrow active? - CORRECT ANSWER - red marrow
red bone marrow - CORRECT ANSWER - organized into cords of cells separated by
sinusoidal capillaries
supported by reticular CT
megakaryocytes sit next to sinuses and release platelets into the blood
other mature cells pass through endothelial cells into bloodstream
Differentiation - CORRECT ANSWER - process in which cells become specialized in
structure and function
Erythropoiesis - CORRECT ANSWER - production of red blood cells
