Chapter Review 2 Flashcards
The tendency of an organism to maintain internal conditions as constant as possible is called
homeostasis
when the atria contract blood flows to the
ventricles
label the following parts of the heart
picture
the innermost layer of an artery is known as the
endothelium
why are the arteries thicker and more elastic than the veins
veins have thinner walls and expand more
the ____ serve as the main reservoir for blood
veins
what is the function of the valves in the veins
prevent back flow
____ pressure occurs when the ventricles relax and ____ occurs when the heart ejects blood
blood pressure; pulse
what happens in capillary exchange
exchange of blood within tissues
the heart muscle is known as the
myocardium
which heart structure initiates the normal contraction impulse in the heart and is known as the pacemaker
SA Node
when the electrical activity of the heart becomes uncoordinated it is called
fibrillation
the build up of fatty plaque deposits in the arteries is called
atherosclerosis
the major functions of the blood include
transport, protect, regulate
RBC’s are better known as
erythrocytes
WBC’s are better known as
leukocytes
hemoglobin is..
iron containing pigment in red blood cells, combines with and transports oxygen
in the heredity disorder ____ red blood cells are misshapen and have difficulty negotiating capillaries
sickle cell
leukocytes responsible for releasing histamine
basophil
monocytes are large lymphocytes that differentiate into
microphages
the most abundant type of white blood cells that are also the first to respond to an infection
neutrophil
Helper t cells have the ability to
stimulate all parts of the immune system
B lymphocytes are associated with
bone marrow
the final reaction in blood clotting is
fibrin traps red blood cells
