HESI A2 EXAM V1 WITH A&P
HESI A2 VERSION 1
READING COMPEHENSION
Doppler Effect
Have you ever wondered why the whistle of a traveling, distant locomotive predicts its
approach several yards before anyone actually sees it? Or why an oncoming ambulance’s
screaming siren is heard momentarily several feet before the ambulance comes into full view,
before it passes you, and why its siren is still heard faintly well after the ambulance is out of
sight?
What you are witnessing is a scientific phenomenon known as the Doppler Effect. What takes
place is truly remarkable. In both of these instances, when the train or ambulance moves toward
the sound waves in front of it, the sound waves are pulled closer together and have a higher
frequency. In either instance, the listener positioned in front of the moving object hears a higher
pitch. The ambulance and locomotive are progressively moving away from the sound waves
behind them, causing the waves to be farther apart and to have a lower frequency. These fast-
approaching modes of transportation distance themselves past the listener, who hears a lower
pitch.
1. Which statement is not listed as a detail in the passage?
A. The oncoming sound waves have a higher pitch because of high frequency and
closeness of waves.
B. The oncoming sound waves have a higher pitch because of low frequency and
closeness of waves.
C. The whistling sound of the locomotive as it approaches and passes can be explained
by the Doppler effect.
D. The high-pitched sound of the ambulance as it approaches and passes can be
explained by the Doppler effect.
2. What is the main idea of the passage?
,HESI A2 EXAM V1 WITH A&P
A. Trains and ambulances make distinctly loud noises.
B. Low-frequency waves make high-pitched sounds.
C. High-frequency waves make low-pitched sounds.
D. The Doppler Effect explains the rationale for why sound is heard initially more
strongly and then faintly after a moving object has passed.
3. What is the meaning of the word phenomenon in the second paragraph?
A. Something that is lifeless to the senses
,HESI A2 EXAM V1 WITH A&P
B. Something that is nonchalant
C. Something that is significant but unusual
D. Something that is chemical in origin
4. What is the author’s primary purpose in writing this essay?
A. To entertain the reader with information about trains and ambulances
B. To inform the reader about avoiding accidents, which involve trains and ambulances
C. To inform the reader about how movement affects sound
D. To analyze the difference between train and ambulance sounds
5. Which sound waves have a higher pitch?
A. Those waves that are closer together
B. Those waves that are farther apart
C. Those waves that travel a long distance
D. Those waves that travel a short distance
6. Which sound waves have a lower pitch?
A. Those waves that are closer together
B. Those waves that are farther apart
C. Those waves that travel a long distance
D. Those waves that travel a short distance
Electrocardiogram
Beep!…Beep!…Beep! is the audible rhythmic sound made as the strength of the heart muscle
is measured.The signal cadence has a characteristic record that varies in every individual. This
, HESI A2 EXAM V1 WITH A&P
record is called an electrocardiogram, or ECG.
In the body, an array of systemic neural responses constantly occur, emitting electric currents.
The electric currents can be detected on the surface of the body, and if a person is hooked to an
amplifier, these impulses are recorded by an electrocardiograph.
Most of the information obtained is about the heart because the heart sends out electric
currents in waves. This “wave of excitation” spreads through the heart wall and is
accompanied by electric changes. The wave takes place in three distinct steps.
Initially, the “wave of excitation” accompanied by an electric change lasts for approximately
1 to 2 seconds after the contraction of the cardiac muscle. The electric impulses are discharged
HESI A2 VERSION 1
READING COMPEHENSION
Doppler Effect
Have you ever wondered why the whistle of a traveling, distant locomotive predicts its
approach several yards before anyone actually sees it? Or why an oncoming ambulance’s
screaming siren is heard momentarily several feet before the ambulance comes into full view,
before it passes you, and why its siren is still heard faintly well after the ambulance is out of
sight?
What you are witnessing is a scientific phenomenon known as the Doppler Effect. What takes
place is truly remarkable. In both of these instances, when the train or ambulance moves toward
the sound waves in front of it, the sound waves are pulled closer together and have a higher
frequency. In either instance, the listener positioned in front of the moving object hears a higher
pitch. The ambulance and locomotive are progressively moving away from the sound waves
behind them, causing the waves to be farther apart and to have a lower frequency. These fast-
approaching modes of transportation distance themselves past the listener, who hears a lower
pitch.
1. Which statement is not listed as a detail in the passage?
A. The oncoming sound waves have a higher pitch because of high frequency and
closeness of waves.
B. The oncoming sound waves have a higher pitch because of low frequency and
closeness of waves.
C. The whistling sound of the locomotive as it approaches and passes can be explained
by the Doppler effect.
D. The high-pitched sound of the ambulance as it approaches and passes can be
explained by the Doppler effect.
2. What is the main idea of the passage?
,HESI A2 EXAM V1 WITH A&P
A. Trains and ambulances make distinctly loud noises.
B. Low-frequency waves make high-pitched sounds.
C. High-frequency waves make low-pitched sounds.
D. The Doppler Effect explains the rationale for why sound is heard initially more
strongly and then faintly after a moving object has passed.
3. What is the meaning of the word phenomenon in the second paragraph?
A. Something that is lifeless to the senses
,HESI A2 EXAM V1 WITH A&P
B. Something that is nonchalant
C. Something that is significant but unusual
D. Something that is chemical in origin
4. What is the author’s primary purpose in writing this essay?
A. To entertain the reader with information about trains and ambulances
B. To inform the reader about avoiding accidents, which involve trains and ambulances
C. To inform the reader about how movement affects sound
D. To analyze the difference between train and ambulance sounds
5. Which sound waves have a higher pitch?
A. Those waves that are closer together
B. Those waves that are farther apart
C. Those waves that travel a long distance
D. Those waves that travel a short distance
6. Which sound waves have a lower pitch?
A. Those waves that are closer together
B. Those waves that are farther apart
C. Those waves that travel a long distance
D. Those waves that travel a short distance
Electrocardiogram
Beep!…Beep!…Beep! is the audible rhythmic sound made as the strength of the heart muscle
is measured.The signal cadence has a characteristic record that varies in every individual. This
, HESI A2 EXAM V1 WITH A&P
record is called an electrocardiogram, or ECG.
In the body, an array of systemic neural responses constantly occur, emitting electric currents.
The electric currents can be detected on the surface of the body, and if a person is hooked to an
amplifier, these impulses are recorded by an electrocardiograph.
Most of the information obtained is about the heart because the heart sends out electric
currents in waves. This “wave of excitation” spreads through the heart wall and is
accompanied by electric changes. The wave takes place in three distinct steps.
Initially, the “wave of excitation” accompanied by an electric change lasts for approximately
1 to 2 seconds after the contraction of the cardiac muscle. The electric impulses are discharged
