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HESI A2 EXAM VOCABULARY, GRAMMAR,
BIOLOGY AND A-P HESI EXAM QUESTION BANK
2025/2026 ACTUAL EXAM QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS0 ALL ANSWERED / ALREADY
GRADED A+ | BRAND NEW! HESI A2 EXAM
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
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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?
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
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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
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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
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.
HESI A2 EXAM VOCABULARY, GRAMMAR,
BIOLOGY AND A-P HESI EXAM QUESTION BANK
2025/2026 ACTUAL EXAM QUESTIONS AND
CORRECT DETAILED ANSWERS (VERIFIED
ANSWERS0 ALL ANSWERED / ALREADY
GRADED A+ | BRAND NEW! HESI A2 EXAM
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
,2|Page
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?
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
,3|Page
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
, 4|Page
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
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.
