Week 3 Flashcards
2.what is the order of the blood vessels that a red blood cell would pass through as a blood leaves the heart,travels to a tissue and then returns to the heart?
Artery,arteriole,capillary,venule,vein
1.systematic blood vessels transport blood
From the left ventricle through the body to the right Atrium
3.which of the following enhances the exchanges between capillary walls and the interstitial spaces
The thinnes of the capillary wall
4.the lining of capillary is called the
Endothelium
5.the exchange of nutrients and gases between the blood and tissues cells is the primary function of
Capillaries
Continuous capillaries
Have a wall where the endothelial cells fit very tight
Which of the following organ would be most likely to contain finest rated capillaries
Kidney
Capillary walls serves as effective permeability barrier for
Proteins
Pre capillary sphincters
Control the blood flow into capillary beds
Which coat of an artery contains endothelium
Tunica intima
Which of the following function is associated with vessels that carry blood directly from arteriole. To veins without passing through capillaries
Thermoregulation
Arteries can constrict or dilate as needed because of the smooth muscles found in the
Tunica media
Following statement concern blood vessels, walls is true
The tunica intima is the innermost layer of a blood vessels walls
The blood vessels that are under the greatest pressure are the
Elastic arteries
Which of the following best describe arteries
Strong,elastic vessels that carry blood under high pressure
Distributing arteries
Contain thick tunica media
From the heart to body tissues which of the following sequences of vessels is correct
Elastic arter,muscles artery, arteriole ,capillary
Valves similar to semilunar valves are found in some
Veins
When contrasting arteries and veins which statement is true
Arteries have thicker tunica media than veins
Veins
May contains valves and are lined eith endothemilum
The structure of a capillarywaal differ from that of veins or artery because
Capillary wall have only endothelium and a basement membrane.
The vasa vasorum are
Special capillaries that supply nutrients to the walls of arteries and veins
The structure that allow blood to flow from arteries to veins without passing through capillaries is called
Arteriovenous anastomoses
Systematic nerves fibres that inner vats blood vessels walls are found primarily epin the
Tunica media
Arteriosclerosis is characterised by
Thicken of the tunica intima and loss of elasticity in the tunica media
In the pulmonary circulation the ——carry blood to the lungs
Pulmonary arteries
The systemic circulation
Includes aorta and all of its branches
The blood vessels that branch from the ascending aorta are the
Coronary arteries
One of the best way to determine the adequacy of peripheral circulation is to check the pedal pulse to check the pedal pulse you would check the pulse in the
Foot
An obstruction in the inferior vena cava would hamper the return of blood from the
Abdomen,pelvis and lower limbs
Veins that return blood directly to the heart include the
Superior vena cava
The velocity of blood flow inside a blood vessel
Is faster in the Center of the blood vessel
The statement about laminar blood flow is true
The outermost layer of blood experience the greatest resistance to flow
Blood pressure is the
Measure of the force blood exerts against blood vessels walls
The auscultatory method of measuring blood pressure
Relies on hearing korotkoffs sound through a stethoscope
A blood pressure reading of 120/80 would
Would be consider normal for young adult male
When measuring blood pressure with a sphygmomanometer which is the following best described when blood flow in a brachial artery is turbulent?
When pressure in the brachial artery I s greater than in the blood pressure cuff and a greater than the diastolic pressure
Whichbof the following would be increase resistance to blood flow
A decrease in the radius of the vessel
Resistance in the cardiovascular system
Tends to increase if blood viscosity increase
Resistance in the cardiovascular system
Tend to increase if blood viscosity increase
According to poiseuilles law
If resistance increase flow decrease
As viscosity of the blood increase
The pressure required to force it to flow increase
The greater the compliance in the vessels
More easily the vessels wall stretches
Which of the following acts as a storage area of blood
The veins
In the aorta
The blood pressure and blood velocity are both high
Resistance to blood flow is greatest in
Arterioles
If someone has a blood pressure reading 110/70 mmhg their pulse pressure would be
40mm hg
Arteriosclerosis results in decreased compliance which in turn causes the pulse pressure to
Increase
In which of the following would you detect a weak pulse
Hemorrhagic shock
When blood pressure is greater than the blood colloid osmotic pressure there is
A net movement of fluid out of the capillary
A force causes the movement of fluid out of the capillary is
Blood pressure
A force that attracts fluid into the capillary from the tissue space is
Blood colloid osmotic pressure
Oedema can occur when there is
A blockage of the lymphatics
Which of the following is less likely to result in edema
Increased mean arterial pressure
In which of the following clinical situations would you expect edema
Burns (which result in increased capillary permeability to plasma proteins)
In capillary exchange which of the following statements is true
Most fluid that leaves the arterial end of the capillary reenters the venous end of a capillary
Which of the following factors assists in the return of venous blood to the heart
2,3,4
Increased venous tone will
Help return blood to the heart
Following happen a person stands in one place for a long period of time
Gravity cause an increased accumulation of blood in the veins im the feet and legs
>blood pressure rises in the venues of the feet
>without muscular movement the pressure at the venous end of the capillaries increase
>edema may occur in the lower extremities
Following would lead to relaxation of the precapillary sphincter
Decrease nitric acid levels
Vasomotor tone can be increased by
Emotional excitement
Following regarding to regulation of local blood flow is true
Increase metabolic rate in a tissue increase capillary blood flow into a tissue
Epinephrine (adrenaline)
Cause vasodilation of coronary blood vessels
Chemoreceptors
Are located in the aorta and carotid bodies
The chemoreceptor reflexes help maintain homeostasis
When carbon dioxide level increase
If a person has a blood pressure of 120/80 their main arterial pressure would be—– mm hg
80
Most of the exchange of the nutrient and waste products that occur between the blood and interstitial spaces occurs across the wall of the —-
Capillaries
The innermost later of a blood vessels wall is the tunica——
Intima
The _____ arteries branch from the ascending aorta
Coronary
The brachial artery divides into the _____ and ______ arteries
Ulnar ,radial
The pelvic area is supplied with blood from the _____ arteries
Internal iliac
_______ Is a measure of the force exerted by blood against the blood vessels walls
Blood pressure
The viscosity of blood is influenced largely by _____ which is the percentage of the total blood volume composed of red blood cells
Haematocrit
The maintanance of blood flow by tissue is called
Autoregulation
The vasomotor Center is located in the ____ and_____
Pons and medulla obolangata
_______ carry blood away from the heart
Arteries
