The blood vessels responsible for variably distributing cardiac output among organs in the body are: a. Veins b. Arteries c. Capillaries  d. Arterioles

The loss of arterial elasticity with age in particular affects... a. Max heart rate b. End diastolic volume c. Systolic pressure d. Stroke volume e. Diastolic pressure

1a) Exercise immediately increases end-diastolic volume.True/False b)Mean arterial pressure is a relevant stimulus for the baroreceptor reflex.True/False c)Which of the following would be the most relevant efferent pathway for the regulation of cardiac output by the hormone epinephrine. (baroreceptor, axon, blood, ventricular cells, AV node, brainstem)

1) A drug was applied to a person that blocked the pore/channel in the L-type calcium channel in cardiac muscle cells. The drug had no other effects. True/false: Cross-bridge cycling and tension production would occur normally in drug-treated fibers. 2) The plateau phase of a cardiac action potential is an absolute refractory period.True/false 3) If a heart lacked gap junctions, an organ-level contraction would occur.True/false 4) During a pacemaker potential, what is caused in neighboring muscle fibers when threshold potential is reached. Group of answer choices a)cross-bridge cycling b)Receptor potential c)An action potential d)A graded potential

The peripheral chemoreceptors that respond to oxygen levels of the blood and regulate heart activity are located in Select one: a. structures near the carotids and aortic arch. b. the infundibulum of the hypothalamus. c. the left ventricle. d. the right ventricle. e. the medulla oblongata.

Which of the following would result from a decrease in aortic pressure? a) a decrease in heart rate b) a decrease in heart contractility c) a decrease in peripheral resistance d) an increase in pressure in the vena cavae

describe one  following realtionship between anatomy and physiology    a.  related the structure of a red blood cell to the function of  a red blood cell in as many ways you can   b. choose one chamber of heart and relate the structure of this chamber to the function of this chamber .  or  c. choose one type of blood vessel  & relate the structure of this vessel to function of this vessel .  write about antomy and physiology

A patient hospitalised with aortic stenosis has activity intolerance related to insufficient oxygen due to decreased cardiac output. An appropriate nursing intervention for this patient is to: Select one: a. Progressively increase activity to increase cardiac tolerance b. Maintain on bed rest to reduce tissue oxygen demands c. Monitor electrocardiography to assess cardiac output d. Use a Semi-Fowler position to decrease venous return and increase respiratory excursion

Which of the following is not true for conduction of the cardiac impulse? A. Action potentials propagate by current flow through gap junctions. B. Slow propagation occurs as a result of low intercellular conductance. C. Slow propagation requires a slower (sustained) current source (1.e. Ca). D. Fast propagation occurs as a result of high intercellular conductance. E. All are true.

Select the FALSE statement: /////////////////www. OA) This abnormal ECG results in increased stroke volume O B) In this abnormal ECG, the ventricles are not stimulated to contract by the SA node, the natural pacemaker. of the heart O C) This abnormal ECG is compatible with life so far as the individual does not engage in strenuous activities OD) This abnormal ECG results in decreased in CO OE) None of the above