Beginning of Circulation

Ohm's Law: **KEY WORDS **: FLOW & RESISTANCE [EQUATION ]: F= ΔP / R ΔP = Change in PRESSURE between ___ & ___ F= Flow , CAN ALSO BE Cardiac ___ __________________________________________________________________________ Other Version of Ohm's Law: **KEY WORDS**: Mean Arterial Pressure & TOTAL Peripheral Resistance [EQUATION]: Cardiac Output = MAP - CVP / Total Peripheral Resistance MAP = Mean Arterial Pressure CVP = Central Venous Pressure (EQUAL TO RIGHT ATRIAL PRESSURE)

Artery ; Vein Output

A woman has a renal blood FLOW of 1200 ml/min and hematocrit of 50. Arterial pressure is 125 mm Hg, and her renal venous pressure is 5 mm Hg. What is the total renal vascular RESISTANCE (in mm Hg/ml/min) A) 0.05 B) 0.10 C) 0.50 D) 1.00 E) 1.50

B) 0.10 * FLOW * & ** Resistance ** = Ohm's Law Question 1200 = 125 - 5 / R R = 120 / 1200 = 0.10

The DIAMETER of a precapillary ARTERIOLE is INCREASED in a muscle vascular bed. A decrease in which of the following would be expected? A) Capillary filtration rate B) Vascular conductance C) Capillary blood flow D) Capillary hydrostatic pressure E) Arteriolar resistance

E Switch to Definition

A man has a arterial blood pressure of 130 mm Hg, a right atrial pressure of 0 mm Hg, and a cardiac output of 3.5 L/min. What is the approximate total peripheral vascular resistance in this man? A) 17 mm Hg/L/min B) 1.3 mm Hg/L/min C) 13 mm Hg/L/min D) 27 mm Hg/L/min E) 37 mm Hg/L/min

E) 37 mm Hg/L/min USE OTHER OHM'S LAW EQUATION

Blood Pressure related to flow & resistance = __'s Law Relationship between Vessel Radius , Length & Viscosity of Blood = ____'s Law

Ohm's Law Pouiselle's Law

62) The tendency for turbulent flow is greatest in which of the following? A) Arterioles B) Capillaries C) Small arterioles D) Aorta

D) Aorta Lots of Blood Flow goes into Aorta really fast (After Isovolumic Contraction?)

36) Which has the highest velocity of blood flow? A) Aorta B) Arteries C) Capillaries D) Venules E) Veins

A) Aorta

*** Fire Hose (Big Vessel) = More pressure w. More Volume Garden hose (Small Vessel) = Less Pressure w. Less Volume** Only Heart in Lung has ____'s Law

Boyle's Law

41) Which of has the greatest total cross-sectional area in the circulatory system? A) Aorta B) Small arteries C) Capillaries D) Venules E) Vena cava

C) Capillaries

87) If a person has been exercising for 1 hour, which organ will have the smallest decrease in blood flow? A) Brain B) Intestines C) Kidneys D) Nonexercising skeletal muscle E) Pancreas

C) Kidneys During exercise , GI (Intestines , Pancreas) are not involved Brain ALWAYS need blood flow

Hemodynamics of Blood Flow: 1) Cross Sectional Area a. LARGEST = ____ries b. SMALLEST = ____a 2) Velocity: a. FASTEST: ___a b. SLOWEST: ____ries 3) Blood Flow is _____ - RBC TRAVEL in ____ Flow [ You bleed in DROPS ] - _____ Flow [High Velocity ] makes SOUND a) Normal Turbulent Sound = S_ rapid filling b) Abnormal heart sound = ____ur c) Abnormal Blood Vessel Sound = ___ ** ___ Blood Pressure (0 - 4mm) IS = Right Atrial Pressure **

Capillaries [Bc there's millions of capillaries layed out ] Aorta [ Only 1 AORTA , so SMALL cross section area ] Aorta Capillaries Silent [ It SHOULD be silent ] Laminar Flow Turbulent S3 Murmur Bruit Venous Blood Return

____ance : Ability of vessel to expand when more blood flow enters it. - VEINS have more compliacne than ____ bc it has a larger ____ per size of vessel Healthy _____ have more compliance than _____ with Atherosclerosis

Compliance Veins ; Lumen Arteries ; Arteries

53) A 65-year-old man has heart failure. Has cardiac output of 4 L/min, arterial pressure of 115/85 mm Hg, and a HR of 90 beats/min. Further tests reveal that the patient has a right atrial pressure of 10 mm Hg. An increase in which of the following would be expected in this patient? A) Plasma colloid osmotic pressure B) Interstitial colloid osmotic pressure C) Arterial pressure D) Cardiac output E) Vena cava hydrostatic pressure

E) Vena cava hydrostatic pressure Bc Venous Blood Pressure is SAME AS RIGHT ATRIAL PRESSURE

Size of Vessels & Hemodynamic Factors: BIG Vessel --> SMALL Vessel due to ____tion a) DECREASE in : ____w , ___tic Pressure , ___ Pressure , ___ Volume , Cond____ b) INCREASE in: ____ance c) FACTORS that Increase Resistance: - Longer ___ , Blood ____ & DECREASED ____ ; *** Small ___ HAS THE MOST IMPACT ** __________________________________________________________________________ SMALL Vessel --> BIG Vessel due to ____tion a) DECREASE in : ____ance b) INCREASE in: __w , ____ Pressure , ___ Pressure , ___ Volume , ___tance

Vasoconstriction Flow , Hydrostatic Pressure (Water Pressure) , Blood Pressure , Blood Volume , Conductance Resistance Longer Vessel , Blood Viscosity , Decreased Radius , Small Radius Vasodilation Resistance Flow , Hydrostatic Pressure (Water Pressure) , Blood Pressure , Blood Volume , Conductance