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

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.

The carotid artery of an animal is partially constricted proximal to the carotid sinus during a study. Which of the following cardiovascular changes most likely occurs in response to the constriction?   (My opinion is the question is referring to carotid clamping not carotid massage ( carotid massage is usually done on carotid sinus to rapidly lower heart rate)) A. Decreased heart rateB. Decreased systemic arterial pressure  C. Decreased venous return to the startD. Increased number of impulses from the carotid sinus  E. Increased total peripheral resistance.

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.

Primary force driving fluid out of the capillary and into interstitial fluid is: a. Interstitial fluid colloid osmotic pressure (ICOP). b. Interstitial fluid hydrostatic pressure (IHP). c. None of the above. d. Blood colloid osmotic pressure(BCOP). e. Capillary Hydrostatic pressure (CHP).

Which of the following is true of propagation of longitudinal electrical flow in cardiac muscle.   A. Current flows longitudinally from a region of depolarization through ryanodine receptors.   B. Longitudinal current flows through inward rectifier potassium channels.   C. This current can be detected at the body surface, if the source is large enough.   D. A and B.   E. All are true.

Afterload is Select one: a. the amount cardiac output must increase during exercise. b. the arterial pressure that the ventricles must overcome to eject blood. c. the extent to which ventricular walls are stretched. d. the name given to an increase in end-diastolic volume. e. another name for venous return.