Flashcards in Cardio System Deck (71)
Which most closely approximates the percentage of water in plasma by weight?
Leukocytes are the _______ of the formed elements, and leukocytes have ______________.
largest, prominent nuclei
How many oxygen molecules may bind to a single molecule of hemoglobin?
Which leukocytes are derived from the myeloid line?
Neutrophils, basophils, eosinophils, and monocytes
The hemoglobin found in erythrocytes is able to chemically attach to
both oxygen and carbon dioxide.
Blood plasma is slightly _______; if pH drifts out of the normal range, dire consequences can result from alterations in the structure of _______ .
Typically, an adult's body contains _______ of blood.
One of the unhealthy effects of blood doping is to
increase the viscosity of the blood.
Which are characteristic of leukocytes?
a: Smaller than erythrocytes
b: Have a nucleus
c: Have no hemoglobin
d: More numerous than erythrocytes
e: Depending on type, may or may not contain granules
b, c, e
Which leukocytes are granulocytes?
a, b, e
The type of leukocyte that is very active during a bacterial infection is a(n)
The life span of an erythrocyte is about _________ days.
When over 10% of the body's blood has been lost, a survival response occurs involving activation of the ________ nervous system.
An individual’s hematocrit would vary with
*All of the choices are correct.
Plasma makes up about ______ percent of a centrifuged sample of whole blood.
The clinical definition of the hematocrit refers to the percentage of
erythrocytes in the blood.
Sodium, calcium, and bicarbonate are all described as plasma
Which are the most numerous of the leukocytes?
The agglutinogens (or antigens) that determine the ABO and Rh blood types are
surface of erythrocytes.
The"buffy coat" consists of
leukocytes and platelets.
When blood loss is severe, the __________ nervous system helps maintain blood pressure and divert blood to where it is needed most.
Which component of whole blood plays the greatest role in maintaining normal fluid levels in the cardiovascular system and preventing fluid loss?
Platelets are formed from
pieces of the megakaryocyte breaking off.
Plasma is composed of about ___________ % water.
Which valve prevents the backflow of blood into the left ventricle when the ventricles relax?
Aortic semilunar valve
The serous fluid within the pericardial cavity works to
lubricate membranes of the pericardium.
Which pair is located more anteriorly in a heart in normal position?
Right atrium and right ventricleCorrect
Which carries oxygenated blood from the lungs to the heart?
Which action leads to the closure of the right atrioventricular valve?
Contraction of the right ventricle