chapter 8 bio
Medium - and large-size vessels maintain a partial state of muscle contraction, resulting in high intravessel pressure
arteries
When blood leaves the heart, it first enters
arteries
Atrioventricular (AV) valves prevent blood from flowing backward into the
atria
The sinoatrial node
regualtes heart beat
Which vein(s) carry oxygenated blood
right and left pulmanry
. this blood vessel transports blood from the heart to capillaries
artery
The inner walls are lined with endothelium to create a smooth, low-friction surface.
artery and vein
? carry blood away from the heart and ? carry blood toward the heart
Arteries; vein
The heart muscle itself receives oxygen and nutrients from blood transported by the ________ arteries
coronary
Vasodilation of arterioles __________ their diameter, __________ blood flow to the capillaries
increases; increasing
The movement of blood through the pulmonary circuit transports
oxygenated blood from the lungs to the heart
The protective sac that encases the heart and anchors it to surrounding structures is the
pericardium
All of the following are part of the cardiac conduction system, EXCEPT
the chordae tendineae
In which one of the following blood vessels is blood under the lowest pressure?
vein
Skeletal muscle pump aid blood
vein
This blood vessel transports blood from the capillaries to heart
vein
Which one of the following is TRUE regarding the lymphatic system
The lymphatic system removes microorganisms from body fluid.
This blood vessel permits exchange of nutrients and gases between blood and tissues.
capillary
Which blood vessel is best suited for exchange of gases and nutrients with the surrounding tissue
capillary
Fluid in the lymphatic system, as well as interstitial fluid, is
derived from blood plasma
Which layer of the heart is in contact with the blood?
endocardium
Which of the following is a true statement regarding strokes?
immmediate meidcal is crucial
An electrocardiogram is used to
measure the electrical activity of the heart
The left ventricle has a more muscular wall than the other three chambers of the heart because the left ventricle
must generate enough blood pressure to pump blood into the aorta and throughout the body
These structures serve as gates that regulate blood flow from arterioles into capillaries.
precapillary sphincters
After blood flows through the right atrium of the heart, its next major destination is the
right ventricle
Spontaneous contractions of the heart muscle begin in the
sinoatrial node
