Transcript Blood and Circulation

Blood and Circulation
The sinoatrial node (pacemaker) is located
in the
 A) right atrium.
 B) left atrium.
 C) right ventricle.
 D) left ventricle

Veins always
 A) lead away from the heart.
 B) lead toward the heart.
 C) carry deoxygenated blood.
 D) have thick muscular walls.


A.
B.
C.
D.
The heart fills with deoxygenated blood
on the right side only.
on the left side only.
on both sides at the same time.
at the septum.

A.
B.
C.
D.
Blood circulating to the toes leaves the
heart from the
right atrium.
left atrium.
right ventricle.
left ventricle.

A.
B.
C.
D.
The largest vein in the body is the
venule.
pulmonary vein.
jugular vein.
vena cava.

A.
B.
C.
D.
The largest artery in the body is the
carotid.
coronary.
pulmonary.
aorta.

A.
B.
C.
D.
In which of the following vessels is blood
pressure greatest?
vein
capillary
artery
arteriole

A.
B.
C.
D.
Blushing, or red face from exercise, is
due to
a skin pigment.
vasoconstriction.
vasodilation.
contraction of muscles in the skin

A.
B.
C.
D.
Which of the following arteries does not
take blood to the leg.
subclavian
iliac
femoral
tibial

A.
B.
C.
D.
The function of valves in the human
circulatory system is to
stimulate the heartbeat.
accelerate the flow of blood.
prevent the backward flow of blood.
serve as a cushion to prevent friction.

A.
B.
C.
D.
The function of valves in the human
circulatory system is to
stimulate the heartbeat.
accelerate the flow of blood.
prevent the backward flow of blood.
serve as a cushion to prevent friction.

A.
B.
C.
D.
Which is the CORRECT flow of blood in
the human?
right atrium right ventricle 
pulmonary artery
right atrium  left atrium  pulmonary
artery
left ventricle pulmonary artery  aorta
left ventricle  left atrium  aorta

A.
B.
C.
D.
During systole of the heartbeat cycle
the heart muscle relaxes.
the A-V valves open.
the semilunar valves close.
blood flows into the pulmonary artery.

A.
B.
C.
D.
The fraction 120/80
is the normal blood pressure of a young
child.
is an indication of hypertension in a
resting adult.
indicates a pressure of 120 during
systole.
is determined by using a
sphygmomanometer to measure blood
pressure

A.
B.
C.
D.
Which factor causes the brain to speed
up the heartbeat?
increase in carbon dioxide in the blood
decrease in carbon dioxide in the blood
increase in oxygen in the blood
decrease in nitrogen in the blood
The exchange of materials between the blood
and the body cells occurs only through the
capillaries because the
A. blood is moving too fast in the arteries and
veins.
B. concentration of materials in the veins and
arteries is too low.
C. walls of the veins and arteries are too thick.
D. blood pressure in the veins and arteries is too
high.


A.
B.
C.
D.
The heartbeat is controlled by which
portion of the brain?
cerebrum
pons
thalamus
medulla

A.
B.
C.
D.
A person with blood type B can only
receive blood from certain people. Who
are they?
B only
B and O
O only
A, O, B, AB

A.
B.
C.
D.
What are the parts of blood mainly
concerned with clotting?
red blood cells
platelets
plasma
white blood cells

A.
B.
C.
D.
Which of the following is/are true of red
blood cells?
They are similar to donuts in shape.
They are formed in bone marrow.
They can squeeze between spaces in
capillary walls.
Both A) and B) are true.

A.
B.
C.
D.
Blood in the pulmonary vein differs from
that in most other veins in that
it is more highly oxygenated.
it is at lower pressure.
it does not flow toward the heart.
it has a higher concentration of
nutrients.
.
A.
B.
C.
D.
Which part of the blood is correctly
paired with its function?
platelets – produce antibodies
white blood cells – carry oxygen
red blood cells – fight infection
plasma – transports wastes and
hormones