A&P ll Ch.20

Normally the blood pressure in the pulmonary capillary bed is about:

6 1/5 ratio for systemic BP

In the sequence of vessels leading away from the heart, which of the following is the most accurate description?

Aorta->Artery->Arteriole->Capillary->Venule->Vena Cava

When contrasting arteries and veins, which of the following statements is true?

Arteries have a greater amount of smooth muscle than veins

Normally, there is no fluid in the tissue spaces of the lungs because

Blood pressure is low

Which statement about capillaries is NOT TRUE?

Blood pressure is lowest in capillaries

With reference to veins

Damage in valves can allow blood to "fall backward"= varicose (prevents blood from going backward)

The aorta and other arteries have thick walls containing large quantities of

Elastic tissue (fibers)

The tissue that lines all the chambers of the heart is made up of:

Endocardium

Which of the following about veins, arteries and capillary is/are true?

Exchange of material between blood in tissue space occurs over capillary wall

Which of the following factors promote venous return during exercise?

Increased inspiration pump activity resulting from increase respiratory movement, & The marked activity of skeletal muscle requires more oxygen to carry blood

Which of the following organs or tissues receive the greatest portion of the total blood flow when the body is at rest?

Liver

When you arise from a lying position, blood pressure decreases. This results in:

Negative feedback (neuro regulation)

Flow through a blood vessel depends on the

Pressure difference between the two ends of the vessel Volume of blood present Vascular resistance ALL OF THE ABOVE

The rate of formation of thrombin from prothrombin is almost directly proportional to the amount of available:

Prothrombinase (enzyme)

The ductus arteriosus allows fetal blood to move from the:

Pulmonary Trunk to Aorta

Which of the following represents the correct sequence of parts through which blood moves in passing from the superior mesenteric artery to the inferior vena cava?

Superior mesenteric vein-> Hepatic portal vein-> Hepatic salasoids-> Hepatic vein-> Inferior vena cava

If someone is performing a "phlebotomy", he/she is:

Taking blood sample from the vein

Which of the following about blood vessels (artery/vein) is a TRUE statement?

The blood that carries blood from the fetus to placenta is umbilical artery

Which of the following properties of capillaries enhances the exchange that occurs between the capillary walls and the interstitial spaces?

The filament of the interstitial space, The extensive branch of the capillaries, Slow blood flow through the capillaries

The layers of an artery from outermost to innermost are:

Tunica adventia (externa)-> Tunica media-> Tunica intima

The tissue which microscopically is squamous epithelium underlain by a sparse connective tissue layer is the:

Tunica intima

Which of these vessels is LEAST in number in the human body?

arteries

Pulsations exist in the circulatory system because:

arteriole has more elastic fibers (elasticity on artery wall)

Which of the following statement about BV pressure is "true"?

capillary pressure is lower than artery

Which statements best describes arteries?

carry blood away from the heart

The hepatic portal circulation:

collects blood from the digestive

The first vessel(s) to branch from the aorta is (are) the

common coronary vessels-> brachiocephalic -> common carotid

The force due to the "elastic rebound of the arterial walls" is called:

diastolic pressure

Arteries are characterized by all of the following except:

have a prolific tributary system

"Tissue fluid" is found in the

interstitial space

The fact that veins hold more blood than arteries is/are due to

larger lumen, less elastic & more branches

If arterial blood pressure falls markedly, which of the following would you expect to occur?

less movement of fluid from capillary vessels to tissue

Under normal conditions, capillary blood pressure is always:

lower than artery pressure (higher than vein pressure)

Plasma proteins that remain in the blood capillaries help best to

maintain colloidal osmotic pressure

Given the following values, determine the direction of flow of materials across the capillary bed. Blood colloidal osmotic pressure = 25 MmHg Interstitial osmotic pressure = 1 MmHg Blood hydrostatic pressure = 60 MmHg Interstitial hydrostatic pressure = 15 MmHg --------------

material is going to move out of the vessel & will have much more force to move them out

The vessel which helps to regulate blood pressure the best is/are:

muscular arteries

What are the cause(s) of edema?

obstruction of lymphatic ducts

Which of the following best describes arteries?

strong, elastic vessels that carry blood under high pressure

Which statement is NOT TRUE of veins?

veins always carry deoxygenated blood