344 Test 2 Flashcards
prescence of erythroblasts in the blood due to failure of their maturation in the bone marrow
Erythroblastosis
abnormal development of large red cell
Megaloblastic
In men blood volume averages ___ ml/kg
75.5
In women blood volume average ___ ml/kg
66.5 (5-6 L)
The arterial pH of normal blood 7.35 to
7.45
Hemoglobin has to 2 __ chains and 2 __ chains
alpha and beta
Each molecule of hemoglobin can carry _ molecules of oxygen
4
Erythropoiesis is governed by __ need
oxygen
erythropoietin is secreted by which organ
kidneys
The rate of RBC destruction equals the rate of production:
1%/day
RBC destruction is facilitated by
phagocytic macrophages
RBC Destruction: White blood cells living in the ___ are ready to process RBCs
spleen
RBC Destruction involves creating ___ bilirubin
unconjugated
Unconjugated bilirubin is __
toxic
unconjugated bilirubin in blood is linked to gluconuride in the ___. This allows it to be excreted
liver
When RBCs Are Destroyed Outside the Spleen, hemoglobinemia makes the plasma turn __
red
Hemoglobinuria makes the urine __-colored
cola-colored
1st Anemia category, impaired oxygen transport, resulting in ___ mechanism
compensatory
2nd Anemia category, reduction in RBC and ___ level
hemoglobin
3rd Anemia category, __ and ___ associated with pathology process
signs and symptoms
Hematocrit in men
40 to 50%
Vitamin B12 Deficiency is associated with ___ anemia
Pernicious Anemia
fluids contains about 2/3 of the body water in healthy adults
Intracellular fluids (ICF)
Sodium
135-145
Potassium
3.5-5.0
Chloride
98-106
Bicarbonate
24-31
Calcium
8.5-10.5
Phosphorus
2.5-4.5
Magnessium
1.3-2.1
refers to the effect a solution exerts on a cell size because of water movement across the membrane
tonicity
Most plentiful electrolyte in ECF
Sodium
what age group is susceptible to hyponatremia
older adults
muscle cramps weakness depressed deep tendon reflex headache disorientation lethargy seizures coma anorexia nausea vomiting cramps diarrhea
hyponeutremia
increased thirst increased ADH dry skin decreased turgor decreased salivation decreased reflexes
hypernatremia
muscle cramps, weakness, and fatigue reflect the effects of ___ on skeletal muscle function
hyponatremia
Can occur during heavy exercise in hot weather
hyponatremia
cells of the brain are affected by increases in intracellular water (causes lethargy, apathy, headache, confusion, loss of tendon reflex)
hyponatremia
A decrease in red blood cells when the body can’t absorb enough vitamin B-12.
Pernicious anemia
A rare condition in which the body stops producing enough new blood cells.
Aplastic anemia
All are true in megaloblastic anemia except
High serum level
Poikilocytosis
irregular shape
Anisocytosis
irregular size
Can result from decreased production of erythrocytes by the bone marrow
anemia
Deficient amount of iron leads to decreased ___ synthesis
hemoglobin
The most common cause of iron deficiency is
blood loss
what happens to the heart rate during anemia
tachycardia
what causes spoon shaped deformity of the finger nails
iron deficiency
smooth tongue, brittle hair and nails, eating abnormal substances
iron deficiency
To prevent iron deficiency in infants, give supplements and avoid
cow’s milk
B12 is needed for DNA synthesis, which is needed for __ ___ maturation
red cell maturation
B12 is needed to prevent ____ breakdown which would lead to neurologic complications
myelin
___ anemia results from autoimmune destruction of gastric mucosa
pernicious anemia
the hallmark of B12 deficiency is _____ anemia
megaloblastic anemia (I think this means increased cell size)
When B12 is deficient, red cells are abnormally ___ in size
large
condition where the RBCs have immature nuclei and the membrane is oval shaped instead of biconcave
pernicious anemia
pernicious anemia can be reversed by
oral dose or injection of B12
Anemia is defined as an abnormally low number of ___, or low level of ___, or both
RBCs or hemoglobin
Anemias caused by premature destruction of RBC
hemolytic anemia
Anemias that result from ineffective hematopoises (premature death of RBCs in the bone marrow) are associated with inappropriately high levels of
iron absorption from the gut
Problems Caused by Sickle Cell
Acute pain
Infarctions cause chronic damage to liver, spleen, heart, kidneys, eyes, bones
Pulmonary infarction acute chest syndrome
Cerebral infarction stroke
Jaundice
Fetal Hemoglobin Has No Beta Chains which means it should not
sickle
Which ion channels allow cardiac muscle to fire without a stimulus?
calcium
Walls of arteries and veins composed of three layers
Tunica externa, tunica media, tunica intima