A&P Heart – Arteries and Veins – Flashcards

Which of the following statements is not true of the precapillary sphinceters? a. They allow blood to bypass the true capillaries that are fed by the metarteriole b. They regulate the flow of blood to tissues served by the rue capillaries c. They increase or decrease rates of perfusion to the tissues served by the true capillaries. d. They decrease the osmotic pressure in the thoroughfare channel.

Which of the following would not promote filtration from the arteriole end of the capillary bed? a. increasing blood pressure b. relaxing precapillary sphincters c. increasing plasma protein concentration d. reducing hydrostatic pressure within the interstitial fluid

In general it is expected that _________ a. hydrostatic pressure will rise as blood moves away from the arteriole end of the capillary bed. b. hydrostatic pressure will drop as blood moves away from the arteriole end of the capillary bed c. hydrostatic pressure will remain constant throughout the capillary bed d. osmotic pressure will be lower in the arteriole end of the capillary bed compared to the venimus end

Which of the following would not promote reabsorption from the venous end of the capillary bed? a. increasing solute concentration in the nearby interstitial fluid b. increasing solute concentration in the plasma of the circulating blood c. decreasing hydrostatic pressure of the blood d. reducing solute concentration in the nearby interstitial fluid.

In general it is expected that ______ a. osmotic pressure will remain relatively consistent throughout the capillary bed. b. osmotic pressure will be lower in the arteriole end of the capillary bed compared to the venous end. c.osmotic pressure will be higher in the arteriole end of the capillary bed compared to the venuous end. d. hydrostatic pressure will remain constant throughout the capillary bed.

Which of the following is most likely to occur in the arteriovenous shuts present in the blood vessels of the finger tips and toes? a. colder temperatures will result in vasoconstrtiction in the arteriovenous shuts. b. warmer temperatures will result in vasoconstriction in the arterovenous shuts. c. Exercise will result in vasocontriction in the arteriovenous shuts. d. colder temperatures will result in vasodilation in the arteriovenous shuts.

Which of the following best describes the benefit of the vasomotion process? a. It allows for rapid increase in blood flow to vital organs during fright or flight response. b. it provides balance between adequate perfusion to all of the tissues while maintaining blood pressure. c. It lowers blood pressure by reducing the distribution of blood flow to all of the tissues in the capillary bed. d. It decreases hydrostatic pressure while also increasing osmotic pressure to enhance reabsorption.

The velocity and pressure of blood is slowest and lowest in the capillary beds. Which of the following is not and accurate description of the benefits of slow, low pressure blood in the capillary beds? a. lower pressure reduces the chance of injury to delicate capillary vessels. b. slower blood flow though capillaries allows more time for diffusion to take place in the capillary bed. c. Lower pressure on the venus end of the capillary bed allows for greater reabsorption of fluid back to the plasma. d. lower pressure in the capillary bed helps to increase pressurein the venus circulation.

Which of the following would have the least influence on blood pressure? a. cardiac output b. peripheral resistance c. white blood cell count d. blood volume

Which of the following chemicals effects blood pressure for both the short and long term? a. aldosterone b. mitral natriuretic peptide c. angiotensin II d. nitric acid

Normal heart sounds are caused by which of the following events? a. excitation of the sinoatrial (SA)node b. closure of the heart valves c. friction of blood against the chamber walls d. opening of the heart valves

Which of the events below does NOT occur when the semilunar valves are open? a. Ventricles are in diastole b. Blood enters pulmonary arteries and the aorta c. AV valves are closed d. Ventricles are in systole

Hemorrhage with a large loss of blood causes _____ a. a lowering blood pressure due to change in cardiac output b. a rise in blood pressure due to change in cardiac output c. no change in blood pressure but a lower heart rate d. no change in blood pressure but a change in respiration

The left ventricular wall of the heart is thicker than the right wall in order to ______ a. accommodate a greater volume of blood b. expand the thoracic cage during diastole c. pump blood with greater pressure d. pump blood through a smaller valve.

Damage to the ____ causes heart block. a. sinoatrial (SA) node b. atrioventrcular (AV) valves c. atrioventricular (AV) bundle d. atrioventricular (AV) node

The p wave of a normal electrocardiogram indicates ______. a. ventricular repolarization b. ventricular depolarization c. atrial repolarization d. atrial depolarization

Blood within the pulmonary veins returns to the _____ a. right atrium b. left atrium c. right ventricle d. left ventricle

The condition where fluid compresses the heart and limits its ability to contract is called. a. pericarditis b. cardiac tamponade c. myocardial infartion d. angina pectoris

What is the relative proportion of the blood through circulatory system?

Relationship between Flow, Pressure, and Resistance If R increases, blood flow decreases