735763
Descripción
Test por Charlotte Camilla, actualizado hace más de 1 año
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Creado por Charlotte Camilla
hace más de 10 años
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Pregunta 1
Pregunta
The heart muscle is stimulated by nerves and self-excitable.
Respuesta
- True
- False
Pregunta 2
Pregunta
Autorythmic cells use which of the following ions for the rising phase of an action potential?
Respuesta
-
Calcium
-
Potassium
-
Sodium
-
None of the Above
Pregunta 3
Pregunta
Atrial excitation begins when...?
Respuesta
-
Sinoatrial node generates an impulse.
-
An impulse is delayed at the atrioventricular node.
-
The impulse passes to the heart apex.
-
None of the Above
Pregunta 4
Pregunta
The heart is stimulated by the parasympathetic cardioaccelatory centre.
Respuesta
- True
- False
Pregunta 5
Pregunta
Ventricular is represented by which letter on the electrocardiograph shown?
Respuesta
-
P
-
Q
-
R
-
S
-
T
Pregunta 6
Pregunta
The heart sound (lub-dup) are associated with the opening of the heart valves.
Respuesta
- True
- False
Pregunta 7
Pregunta
Which of the following are true of the cardiac output?
Respuesta
-
CO is the amount of blood pumped by each ventricle in one minute.
-
CO is the product of heart rate and stroke volume.
-
CO is the amount of blood pumped out by a ventricle with each beat.
-
CO is the number of heart beats per minute.
Pregunta 8
Pregunta
Cardiac reserve is the difference between resting and maximal CO.
Respuesta
- True
- False
Pregunta 9
Pregunta
End Systolic Volume (ESV) is the amount of blood collected in a ventricle during diastole.
Respuesta
- True
- False
Pregunta 10
Pregunta
Which of these best describes preload?
Respuesta
-
The amount ventricles are stretched by contained blood.
-
The back pressure exerted by blood in the large arteries leaving the heart
-
The cardiac cell contractile force.
-
None of the Above
Pregunta 11
Pregunta
Which of the following decrease heart contractability?
Respuesta
-
Acidosis
-
Temperature Extremes
-
Increased extracellular K+
-
Calcium channel blockers
Pregunta 12
Pregunta
Sympathetic nervous system (SNS) stimulation is activated by stress, anxiety, excitement, or exercise.
Respuesta
- True
- False
Pregunta 13
Pregunta
What is the Atrial (Bainbridge) Reflex?
Respuesta
-
A sympathetic reflex initiated by increased blood in the atria.
-
A parasympathetic reflex initiated by increased blood in the ventricles.
-
A sympathetic reflex initiated by increased blood in the ventricles.
-
A parasympathetic reflex initiated by increased blood in the atria.
Pregunta 14
Pregunta
The hormone thyroxin decreases heart rate.
Respuesta
- True
- False
Pregunta 15
Pregunta
Congestive heart failure (CHF) is caused by:
Respuesta
-
Coronary atherosclerosis
-
Persistent high blood pressure
-
Multiple myocardial infarcts
-
Dilated cardiomyopathy
Pregunta 16
Pregunta
Which of these are examples of Congenital Heart Defects?
Respuesta
-
Ventricular Septal Defect
-
Coarctation of the Aorta
-
Tetralogy of Fallot
-
All of the Above
Pregunta 17
Pregunta
The decline in cardiac reserve is an age related change that can affect the heart?
Respuesta
- True
- False
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