Heart Anatomy
What valve lies between the right ventricle and its arterial outflow?
a. Bicuspid
b. Tricuspid
c. Aortic
d. Pulmonary
d. Pulmonary
What term refers to contraction of the heart?
a. Diastole
b. Systole
c. Constriction
d. Automaticity
b. Systole
What nerves supply parasympathetic innervation to the SA and AV nodes?
a. Vagus nerves
b. Phrenic nerves
c. Intercostal nerves
d. Cardiac nerves
a. Vagus nerves
Which of these factors that affect peripheral resistance can be quickly altered to change systemic BP?
a. Viscosity
b. Vessel diameter
c. Vessel length
d. Turbulence
b. Vessel diameter
What term refers to a heart rate higher than 100 bpm?
a. Bradycardia
b. Tachycardia
c. Hypertension
d. Fibrillation
b. Tachycardia
Which of these vessels sends blood into the right atrium?
a. Coronary sinus
b. Coronary artery
c. Pulmonary vein
d. Pulmonary trunk
a. Coronary sinus
What part of the conduction system supplies the ventricular myocardium?
a. Bundle branches
b. Ventricular bundle
c. Purkinje fibers
d. Internodal pathway
c. Purkinje fibers
In what part of the brain are the cardioacceleratory and carioinhibitory centers located?
a. Hypothalamus
b. Medulla oblongata
c. Pons
d. Midbrain
b. Medulla oblongata
Which type of vessel has the lowest velocity of blood flow?
a. Elastic arteries
b. Large veins
c. Arterioles
d. Capillaries
d. Capillaries
Which of the following would be treated with balloon angioplasty?
a. Atherosclerosis
b. Valvular insufficiency
c. Damage to the SA node
d. Systemic hypertension
a. Atherosclerosis
Which of these is associated with intercalated discs?
a. Myofibrils
b. Endocardium
c. Gap junctions
d. T tubules
c. Gap junctions
If cells of the SA node are killed, what part of the heart has auto rhythmicity to establish a new(slower) heart rate?
a. Atrial myocardium
b. Interatrial septum
c. AV bundle
d. AV node
d. AV node
Which of the following will DECREASE the end-systolic volume?
a. Slowing the heart rate
b. Secretion of acetylcholine
c. Increasing contractile strength
d. Decreasing EDV
c. Increasing contractile strength
Which of these occurs first when systemic arterial blood pressure falls outside the normal range?
a. Activation of angiotensin
b. Secretion of angiotensinase
c. Release of epinephrine
d. Stimulation of aldosterone
c. Release of epinephrine
What structures help prevent backflow through the AV valves?
a. Papillary muscles
b. Pectinate muscles
c. Trabeculae carneae
d. Moderator bands
a. Papillary muscles
An increase in venous return of blood to the heart will increase the EDV. Which of these will also occur?
a. Decrease in preload
b. Increase in stroke volume
c. Slowdown of HR
d. Decline of diastolic BP
b. Increase in stroke volume
Retention of excess fluid can stimulate the heart to secrete natriuretic peptides. Which of these is these is likely to occur next?
a. Peripheral vasodilation
b. Increased renal water reabsorption
c. Systemic vasoconstriction
d. Secretion of aldosterone
a. Peripheral vasodilation
What organ provides long-term, continual regulation of blood volume and blood pressure by secreting renin and being the target of ADH and aldosterone?
a. Liver
b. Heart
c. Kidney
d. Adrenal
c. Kidney