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Physiology- Katie > Clicker questions exam 2 > Flashcards

Clicker questions exam 2 Flashcards

1
Q

Which of the following represents the mean electrical axis of the heart ?

a. 29 degrees
b. 59 degrees
c. 30 degrees
d. 120 degrees

A

b. 59 degrees

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2
Q

Of the three bipolar leads, which one is connected to both left and right arms?

A. Lead I

B. Lead II

C. Lead III

D. All leads are connected to only one arm each

A

A. lead I

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3
Q

Which of the following is the direction of bipolar lead III?

A. 0°

B. 60°

C. 90°

D. 120°

A

D. 120°

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4
Q

Which of the following events is generally not seen on a typical ECG?

a. Atrial depolarization
b. Atrial repolarization
c. Ventricular depolarization
d. Ventricular repolarization

A

b. Atrial repolarization

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5
Q

In a typical ECG, which of the following waves occurs at the beginning of the contraction of the atria?

a. T
b. R
c. S
d. P
e. Q

A

d. P

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6
Q

In the ECG shown below, which of the following heart activities is represented? (Lead III)

A. Sinus tachycardia

B. Sinus bradycardia

C. Complete AV block

D. Incomplete second degree block with dropped beats

A

B. Sinus bradycardia

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7
Q

Which of the following condition may result in tachycardia?

A.Toxic conditions of the heart

B. Increased body temperature

C. Sympathetic nerve stimulation

D. All of the above

E. B and c only

A

D. all of the above

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8
Q

Circus movements are the basis of heart fibrillation. Which of the following statement is NOT true?

A. Fibrillation may occur when the refractory period of the muscle is greatly shortened

B. Fibrillation may occur when the pathway around the circle is too short

C. Fibrillation may occur when the conduction velocity slows downs

D. Fibrillation may occur when the heart becomes dilated

A

B. Fibrillation may occur when the pathway around the circle is too short

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9
Q

What does the ECG indicate?

A

Sinus Tachycardia Lead I

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10
Q

What does the ECG Indicate?

A

Sinus Bradycardia

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11
Q

What does the Tachyocardiogram Indicate?

A

Sinus Arrythmia

a little pattern w/ normal breathing

w/ deep breathing HR increases

measure of Heart rate…notice scale reversed

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12
Q

What does the ECG Indicate?

A

Sinoatrial Nodal Block

Lead III

P , slight p, no P from 3rd on

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13
Q

What does the ECG Indicate?

A

Prolonged P-R Interval - First Degree Atrioventricular (A-V) heart block

Lead II

Don’t drop any QRS waves

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14
Q

What does the ECG Indicate?

A

Second Degree Atrioventricular (A-V) Block Lead V3

Dropped a QRS wave!!

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15
Q

What does the ECG Indicate?

A

Complete Atrioventricular (A-V) Block

no relation between P waves and rate of QRS- T complexes

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16
Q

What does the ECG Indicate?

A

Partial Intraventricular Block

(Electrical Alternans)

Lead III

Note change in amplitude of QRS complexes

Even P waves show some irregularities in their Amplitude

17
Q

What does the ECG Indicate?

A

Atrial Premature Beat

Lead I

SA node messed up

18
Q

What Does the ECG Indicate?

A

A-V nodal Premature Contraction

Lead III

P waves combine with QRS wave.

AV node fired early before he Signal from the SA node

19
Q

What Does the ECG Indicate?

A

Atrial Paroxysmal Tachycardia

Lead I

20
Q

What Does the ECG Indicate?

A

Ventricular Paroxysmal Tachycardia

Lead III

21
Q

What Does the ECG Indicate?

A

Ventricular Fibrillation

Lead II

22
Q

What Does the ECG Indicate?

A

Atrial Fibrillation

Normal QRS but no P waves

23
Q

What does the ECG Indicate?

A

Normal

Lead I

24
Q

What does the ECG Indicate?

A

Normal

Lead II

25
Q

What does the ECG Indicate?

A

Normal

Lead III

26
Q

84% of the blood volume is in the systemic circulation, of this, 64% is in which of the following vessels?

A. Capillaries

B.Systemic arterioles

C. Veins

D. Arterioles

A

C. Veins

27
Q

Blood flow resistance is indirectly proportional to which of the following?

A. Viscosity

B. Vessel diameter

C. Density

D. Both a and c

A

B. Vessel diameter

28
Q

Reynolds number is a measure of which of the following parameters?

A. Tendency for turbulence

B. Blood pressure

C. Conductance

D. Resistance

A

A. Tendency for turbulence

29
Q

Which of the following represents the viscosity of blood with a hematocrit of 38-42?

A. 1.5

B. 3.0

C. 38

D. 42

A

B. 3.0

Note 1.5 = Viscosity of Plasma

30
Q

The least amount of damping of the pressure pulses would occur in which of the following components of the circulatory system?

a. Femoral artery
b. Arterioles
c. Capillaries
d. Venules

A

A. Femoral Artery

31
Q

Which of the following factors affect(s) pulse pressure?

a. Vascular elastance
b. Arterial compliance
c. Stroke volume
d. All the above
e. B and C only

A

e. B and C only

32
Q

Which of the following is the most important means for the exchange of substances between the blood and the interstitial fluid?

a. Blood hydrostatic pressure
b. Capillary oncotic pressure
c. Diffusion
d. Interstitial fluid hydrostatic pressure
e. Osmosis

A

c. Diffusion

33
Q

Vascular distensibiliy is directly proportional to which of the following?

A. Increase in Volume

B. Increase in Pressure

C. increase in resistance

D. All of the Above

A

A. Increase in Volume

34
Q

If rate of blood flow through the entire circulatory system (=cardiac output) = 100 ml/sec AND the pressure different from the systemic arteries to the systemic veins = 100mm Hg; the total peripheral resistance is equal to…?

A. 10 PRU

B. 1 PRU

C. 0.01 PRU

D. 100,000 PRU

A

B. 1 PRU

Physiology- Katie (10 decks)

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