PCC Bio 202 exam 1
What is a fenestrated capillary? - answer More permeable than continuous capillaries
Function in absorption or filtrate formation (small intestines, endocrine glands and
kidneys)
Are not found in the brain
Why is the left ventricular heart wall thicker than the right? - answer It helps it pump
blood with greater pressure to whole body right only pumps to lungs.
What happens with a thromboembolic disorder? - answer Involves embolus formation, a
clot moving throughout the circulatory system
Which blood type is a universal donor? - answer Type O
What are functions of myocardial cells? - answer as a whole heart contracts as a unit or
it does not contract at all
What events occur when the semilunar (SL) valves are open? - answerBlood enters
pulmonary arteries and aorta
AV valves are closed
Ventricles are in systole
What epithelia supports the tunica intima? - answerSquamous epithelium supported by
a sparse connective tissue layer
What are three main factors influencing blood pressure? - answerCardiac output (CO)
Peripheral resistance
Blood volume
What are the parts of the heart's conducting system? - answerAV node
SA node
Bundle of His
What regulates cerebral blood flow? - answerIntrinsic autoregulatory mechanisims
What is the source of blood going to capillaries in the myocardium? - answerCoronary
arteries
Platelets .... - answerstick to area of damaged blood vessel and help to seal the break
What is caused by hemorrhaging and a large loss of blood? - answerA lowering of blood
pressure due to a change in cardiac output
, What is the plasma protein that is a main contributor of osmotic pressure? -
answerAlbumin
Blood flow through the vascular system is equal to? - answerCardiac output
What is an isovolumetric contraction? - answerThe short period during ventricular
systole when the ventricles are completely closed
What is the primary function of capillaries? - answerPermitting the exchange of nutrients
and gases between the blood and tissue cells
What are some protective functions of blood? - answerprevention of blood loss and
infection
What are sinusoids?, - answerModified capillaries with large clefts
Peripheral resistance increases as what else increases? - answerBlood viscosity
increases
Where in the body is blood flow velocity the slowest? - answerIn the capillaries
Blood is what type of substance? - answerFluid tissue,suspension
What are some functional characteristics of WBC? - answerDiapedesis, amoeboid
motion and positives chemotaxis
What is the slowest step in the clotting process? - answerFormation of prothrombin
activator
Blood in pulmonary veins returns to where? - answerLeft atrium
Some basic facts about heart valves - answerAV valves are supported by chordae
tendineae, tricupus valve divide the bicupus so that regurgitation of blood into the atria
during ventricular contraction does not occur.
What vessels receive blood during ventricular systole? - answerAorta and pulmonary
trunk
The tunic of an artery most responsible for maintaining blood pressure? - answerTunica
medica
What organ regulates red blood cell production? - answerkidney
What layer of the heart contracts? - answerMyocardium
What is a fenestrated capillary? - answer More permeable than continuous capillaries
Function in absorption or filtrate formation (small intestines, endocrine glands and
kidneys)
Are not found in the brain
Why is the left ventricular heart wall thicker than the right? - answer It helps it pump
blood with greater pressure to whole body right only pumps to lungs.
What happens with a thromboembolic disorder? - answer Involves embolus formation, a
clot moving throughout the circulatory system
Which blood type is a universal donor? - answer Type O
What are functions of myocardial cells? - answer as a whole heart contracts as a unit or
it does not contract at all
What events occur when the semilunar (SL) valves are open? - answerBlood enters
pulmonary arteries and aorta
AV valves are closed
Ventricles are in systole
What epithelia supports the tunica intima? - answerSquamous epithelium supported by
a sparse connective tissue layer
What are three main factors influencing blood pressure? - answerCardiac output (CO)
Peripheral resistance
Blood volume
What are the parts of the heart's conducting system? - answerAV node
SA node
Bundle of His
What regulates cerebral blood flow? - answerIntrinsic autoregulatory mechanisims
What is the source of blood going to capillaries in the myocardium? - answerCoronary
arteries
Platelets .... - answerstick to area of damaged blood vessel and help to seal the break
What is caused by hemorrhaging and a large loss of blood? - answerA lowering of blood
pressure due to a change in cardiac output
, What is the plasma protein that is a main contributor of osmotic pressure? -
answerAlbumin
Blood flow through the vascular system is equal to? - answerCardiac output
What is an isovolumetric contraction? - answerThe short period during ventricular
systole when the ventricles are completely closed
What is the primary function of capillaries? - answerPermitting the exchange of nutrients
and gases between the blood and tissue cells
What are some protective functions of blood? - answerprevention of blood loss and
infection
What are sinusoids?, - answerModified capillaries with large clefts
Peripheral resistance increases as what else increases? - answerBlood viscosity
increases
Where in the body is blood flow velocity the slowest? - answerIn the capillaries
Blood is what type of substance? - answerFluid tissue,suspension
What are some functional characteristics of WBC? - answerDiapedesis, amoeboid
motion and positives chemotaxis
What is the slowest step in the clotting process? - answerFormation of prothrombin
activator
Blood in pulmonary veins returns to where? - answerLeft atrium
Some basic facts about heart valves - answerAV valves are supported by chordae
tendineae, tricupus valve divide the bicupus so that regurgitation of blood into the atria
during ventricular contraction does not occur.
What vessels receive blood during ventricular systole? - answerAorta and pulmonary
trunk
The tunic of an artery most responsible for maintaining blood pressure? - answerTunica
medica
What organ regulates red blood cell production? - answerkidney
What layer of the heart contracts? - answerMyocardium
