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In healthy adults the primary location of destruction of damaged RBCs is |
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The form of hemoglobin that has the highest affinity (binds most tightly) for oxygen |
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Which would you expect to see in elevated numbers in a peripheral blood sample from a patient who 10 days ago donated a pint of blood to the Red Cross |
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The waste product bilirubin is produced from |
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Portions of heme molecules that do not contain iron |
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The diease sickle cell anemia is a good example of what can happen when |
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The aa sequence of normal globin is altered |
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The central factor in the coagulation process is the formation of this factor which converts Fibrinogen into Fibrin |
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The central factor in initiating Fibrinolysis (dissollution of a a blood clot) is |
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Which coagulation pathway is initiated by tissue factor from damaged vascular endothelium or peripheral tissue |
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The main event of the secondary homeostasis is |
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When a patient suffers a classic myocardial infarction, what is the most common factor that initiates the process |
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Definition
Formation of a platelet plug within a coronary artery |
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Blood returning to the heart from the pulmonary circuit first enters the |
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The cusps of atrioventricular valves are attached to papillary muscles by the |
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The left and right pulmonary arteries carry blood to the |
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The bicuspid (mitral) valve is located |
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Definition
Between the left atrium and left ventricle |
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The first heart sound is heard when the |
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During diastole in the cardiac cycle, the chambers of the heart: |
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Definition
Relax and fill with blood |
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Compared to skeletal muscle, heart muscle has all the following charecteristics except:
Heart muscle has gap junctions that allow depolarization to pass cell to cell
Heart muscle is more dependent on aerobic metabolism
Heart muscle cells are shorter
Heart muscle cells have fewer mitochondria |
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Definition
Heart muscle cells have fewer mitochondria |
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This structure is the "pacemaker" of the heart that sets the heart rate |
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Repolarization of the ventricles is represented on an EKG by |
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The section of the conductive tissue that is responsible for the approximately 1/10 of a second delay between the depolarization of the atrium and the ventricles is |
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The prolonged depolarization seen in cardiac muscle is that result of which ion |
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The primary ion channel responsible for depolarization of a conductive cell to threshold |
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The primary ion channel responsible for repolarization of a heart muscle cell |
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If the vagus nerve is stimulated then we could expect what changes in heart function |
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Definition
Heart Rate Decreased, Heart Contractility Unchanged |
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The cardiac output cannot increase indefinitely becuase |
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Definition
Available filling time becomes shorter as the heart rate increases |
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Which under normal physiologic range will cause the greatest increase in the cardiac output |
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The volume of blood ejected from each ventricle during a contraction is called |
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In cardiac rhythms, prologation of which interval puts a patient at the greatest risk of life threatening arrthymias such as ventricular fibrilation |
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When a patient with heart failure decompensates and presents with severe fluid overload with pulmonary edema and severe respiratory distress, which of the following families of medications is usually given first in order to msot rapidly begin relieving the patient's distress |
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Definition
Narcotic Medications such as Morphine |
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The blood vessels that collect blood from all tissues and organs return it to the heart are the |
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Which is the only blood vessel to have no smooth muscle |
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When blood flows through one capillary bed into veins and then flows though a second capillary bed before the blood returns to the heart is an example of |
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Which of the following arteries is not a conducting artery |
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The primary point of control of the flow through an individual capillary is at the |
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The oncotic pressure of blood is primarily due to |
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Fluid into the capillaries in the secondfirst half of their course becuase |
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Definition
Capillary Hydrostatic Pressure<Blood Osmotic Pressure |
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Capillary that can freely allow large proteins and even blood cells to move freely in and out |
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A person with a systolic blood pressure of 130 mm Hg and a diastolic pressure of 85 mm Hg would have a pulse pressure of approximately |
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The primary mechanism that the body uses to regulate peripheral vascular resistance is |
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The "BAD" cholesterol that transport excesses cholesterol from the tissue back to the liver is |
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If a blood vessels has its radius tripled then we would expect that its flow velocity would increase by a factor of |
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Secretion of this hormone has the greatest potential to elevate the viscosity of blood |
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Which hormone is produced by the heart |
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This reflex will cause slowing of the heart by stimulation of the parasympathetic nervous system and nerve impulse traveing to the heart over the vagus nerve |
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Increases in blood Carbon Dioxide or decreases in Oxygen will trigger this reflex |
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The arteries that supply the myocardium |
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Major arteries supplying the anterior and middle cerebral arteries |
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Supplies most of the small bowel and the beginning of the colon |
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This artery is the source of blood for the muscles that dorsiflex the foot |
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