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Bio 669 2025 Quiz 4 Practice Questions And
Answers With A Guaranteed Sure Pass (Score
A)
Which of the following is incorrect regarding the isometric contraction phase of the cardiac cycle? the atria are contracting The resistance of movement of blood from the left ventricle to the aorta is termed the afterload Natiuretic peptides act by stimulates the release of Na+ (thus increases urine volume from the kidneys The double layered serous membrane surrounding the heart that functions to minimize friction from the heart movement is the pericardium
prinzmetal angina is a transient ischemia of the myocardium that occurs unpredictably progressive venous distention of the head and upper extremities resulting from growth of a cancerous tumor on the right mainstem bronchus is best described clinically as superior vena cava syndrom the most common cause of aneurysm is atherosclerosis with hypertension an atherosclerotic area that has ruptured is termed complicated plaque The PR interval represents the time from the onset of atrial systole to the onset of ventricular systole
stroke volume none of the above are true T wave relates to _______ and shortly precedes teh closure of the ______valves ventricular repolarazation, SL How muc of the oxygen carried by hemoglobin in the blood is actually transferred to the myocardium 70 - 75 The key regulator determining if a muscle, such as cardiac muscle, contracts or not is the presence of Ca++ Myocardial hibernation is best described as myocardial cells that are persistently ischemic and undergo metabolic adaptation to prolong survival
a thrombus is a blood clot that remains attatched to a vessel wall. Which of the following is NOT one of the main factors as proposed by Virchow obesity A 12 year old boy presenting with complaints of fever, mink macular rash on the trunk, and finding a diastolic murmer on the exam should be investigated for possible rheumatic fever the decreased or inability to generate action potential due to hyper-polarization or continued closure of inactivation gates is termed refractory period All of the following antihypertensive agents would be appropriate first line treatments EXCEPT beta blockers STEMI would most likely present with Marked ST segment elevation
when the AV valves are closed choose the correct conduction pathway for a cardiac action potential SA node to AV node to bundle of HIS to bundle branches to purkinje fibers which of the following vessels carries oxygentated blood pulmonary vein Which of the following conditions is the most immediately at risk for serious complication STEMI Thromboangiitis obliterans (Buerger disease) is an autoimmune condition that is strongly associated with smoking which of the following is not a systemic disease that is associated with Reynaud's phenomenon congestive heart failure
rheumatic fever and subsequent heart complications in 10% of individuals is left untreated arises from group A beta hemolytic strep pharyngitis which of the following is NOT a primary factor in determining preload total peripheral (systemic) resistance Which of the following statements are incorrect prostacyclins which are diminished by NSAIDS are vasoconstrictors which of the following valve abnormalities is heard during diastole( diastolic murmer) mitral stenosis which of the following can form and embolus? all of the following can form an embolus
I band a result of the action potentials long duration in stimulating muscle is that all of the above what is the effect of decreasing 02 and increasing c02 levels (hypoxemia on myocardial contractilty increases at less severe (02 sat > 50%) but decreases at more sever hypoxemia a common and overlooked cause of chronic orthostatic hypertension is autonomic neurophathy in person with diabetes secondary hypertension is best described as a result of an identifiable condition such as pheochromocytoma which characteristic changes shoud the nurse keep in mind while caring for a patient with left heart failure. as left heart failure progresses left ventricular preload increases
which of the follwing factors is not commonly associated with the development of hypertension high dietary levels of Ca++ K+ and MG+ your patient with a history of coronary artery disease and regular chest pain brought on by exercise of certain duration now has significant and worsening chest pain, sweating, and mild dyspnea. Which of the following statements is true regarding this patient all of the above are true The disorder of the myocardium that is characterized by normal systolic but increased diastolic pressure due to abnormal filling of either or both ventricles and normal wall thickness is: restrictive cardiomyopathy an aortic semilunar valve prolapse would be best heard during ventricular diastole in cardiac muscle, Na+ inactivation gates will open again following another
phase of the cardiac cycle. This property is called automaticity Arterial chemoreceptors within the aortic arch and carotid arteries: Increase heart rate, stroke volume and blood pressure in response to decreased oxygen or increased CO2 levels The portion of troponin that binds the troponin complex to actin and is released into the plasma during cardiac cell damage(and is a useful indicator of an acute MI) is troponin: T As a wave of action potentials travel from the atria to the ventricles, it is momentarily delayed by about 0.1 second as a result of slow conduction through the AV node The area that connects cardiac fibers to one another as well as electrically connecting them is termed: the intercalated disk
Which of the following effects does the renin angiotensin aldosterone system (RAAS) NOT directly affect in the development of hypertension? Increase in heart rate and stroke volume, thus increasing cardiac output Myocardial stunning refers to the Temporary loss of contractile function that persists for hours to days after restoration of perfusion Identify the correct path of blood through the heart and lungs vena Cava โ R Atrium โ Tricuspid valve โ Right ventricle โ Pulmonary artery- Pulmonary vein โ L Atrium โ Mitral valve โ L Ventricle โ Aorta The innermost layer of the heart wall (inner lining layer) is the endocardium Which of the following is most likely to increase ejection fraction? sympathetic nervous sytem activation
most indicative of which disease process? infective endocarditis
