CH. 20 Assessment

Categorize the following as to whether each will increase or decrease mean arterial pressure.

Increases MAP: -increased heart rate -drugs that cause vasoconstriction -increasing en-diastolic volume -decreasing blood pH Decreased MAP: -blood loss -Beta-adrenergic blockers -decreasing adrenal medullary hormone secretion -decreased stroke volume -increasing parasympathetic stimulation

Categorize the following in terms of the muscle type to which they correspond.

SKeletal muscles: -multinucleate cells -very long cells -each cell is innervated -all calcium comes from sacroplasmic reticulum Cardiac muscle: -action potential includes plateau phase -gap junctions between cells -branching cells -may depolarize without nervous stimulation

Order the flow of blood through the pulmonary circulation, beginning with the emptying of blood from the superior vena cava.

-right atrium -tricuspid valve -right ventricle -pulmonary valve -pulmonary arteries -lungs -pulmonary veins -left atrium

1. P wave 2. QRS complex 3. T wave 4. PQ (PR) interval 5. QT interval

1. Atrial depolarization 2. Ventricular depolarization 3. Ventricular repolarization 4. Equates to atrial systole (and beginning diastole) 5. Equates to ventricular systole (and beginning diastole)

Match these terms with their correct definitions. Note that "EDV-ESV" refers to end diastolic volume minus end systolic volume. 1. Mean arterial pressure 2. Cardiac output 3. Peripheral resistance 4. Heart rate 5. Stroke volume

1. CO X PR 2. HR X SV 3. Total force against which the blood must be pumped 4. Heart beats per minute 5. EDV - ESV

1. Inferior and superior vena cava 2. Pulmonary trunk 3. Pulmonary veins 4. Aorta

1. right atrium 2. right ventricle 3. left atrium 4. left ventricle

1. Thin serous membrane that is the outer surface of the heart 2. Thick, middle layer of the heart 3. Covers surfaces of the heart valves 4. Mostly composed of cardiac muscle cells 5. The inner surface of the heart 6. Also known as the visceral pericardium

1. Epicardium 2. Myocardium 3. Endocardium 4. Myocardium 5. Endocardium 6. Epicardium

Place the components of the electrical conducting system in order from the initiation of an action potential until the end.

1. SA node 2. Atrial myocardium 3. AV node 4. AV bundle 5. Right and left bundle branches 6. Purkinje fibers

1. AV valves are open 2. Semilunar valves are open 3. First heart sound 4. Second heart sound 5. Third heart sound

1. Ventricular diastole 2. Ventricular systole 3. Ventricular systole 4. Ventricular diastole 5. Ventricular diastole