HESI A2 Reading Comprehension Practice Test Set 2

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• Changes in the ECG are typically used for diagnosis of abnormal cardiac rhythm. [[PAGE:106]] HESI A2 Actual Exam
• The signal has a characteristic record called the electrocardiogram.
• The “wave of excitation” starts at the SA node.
• The “wave of excitation” spreads through the heart wall and is accompanied by electric changes.

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• Repelling
• Releasing
• Closing
• Charging

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• Electric currents within the body are due to electrostatic charges set off by the heart. Medical staff are trained to recognize any abnormalities within the heart.
• Every individual has unique electric currents on the surface of the body. The ECG measures and records these electric currents.
• The ECG systematically and rather quickly measures the stages at which the “wave of excitation” occurs within the heart and records them. This wave has three distinct steps that spread from the SA node to the AV node.
• The ECG measures the electric currents within the body. These currents are detected on the surface of the body when the body is connected to an amplifier.

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• The discharge from the SA node, the peak ECG, and the excitement of the ventricle.
• The excitement of the ventricle, the relaxing of the ventricle, and the systemic neural response.
• The contraction of the atrium, the relaxation of the atrium, and the contraction of the ventricle.
• The excitation of the atrium, the excitement of the ventricle, and the relaxing of the ventricle.

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• Baroreceptors are stretch receptors composed of fine branching nerve endings that are contained along the walls of the arteries near the heart and in other areas of the body.
• Chemoreceptors are located along the walls of the arteries and monitor changes in oxygen level, carbon dioxide, and pH.
• The kidneys play a role in regulating blood pressure by absorbing salts and water and removing wastes.
• The heart is the body’s pump, which regulates the flow of vitally needed oxygen to all cells of the body.

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• To spread
• To gradually develop
• To revolve
• To shift

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• To inform the reader about the dangers of high blood pressure
• To inform the reader how high blood pressure leads to a higher risk of heart attack
• To inform the reader how the cardiovascular system regulates blood pressure
• To persuade the reader that controlling one’s blood pressure is important

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• The body’s pump, the heart, regulates the flow of oxygen to all cells of the body and discards waste products like carbon dioxide. The kidneys assist by absorbing salts and water.
• There are several systems that maintain the body's natural functions. The cardiovascular system regulates blood pressure through baroreceptors, chemoreceptors, and the kidneys.
• Baroreceptors, located along the walls of arteries, help regulate blood pressure by sending impulses to the heart, arteries, and veins.
• Chemoreceptors monitor changes in oxygen levels that impact blood pressure.

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• Baroreceptors and chemoreceptors both work within the wall of the arteries, sending out impulses to raise or lower blood pressure, whereas the kidneys help control blood volume.
• Baroreceptors and chemoreceptors both work to help maintain blood volume, whereas the kidneys take care of salts, water, and waste removal. [[PAGE:111]] HESI A2 Actual Exam
• Baroreceptors and chemoreceptors must work together to control blood pressure, whereas the kidneys work with the adrenal cortex.
• Baroreceptors and chemoreceptors are both located near the adrenal cortex, whereas the kidneys are located near the heart.

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• ATP
• Glucose
• Water
• Oxygen

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• The oncoming sound waves have a higher pitch because of high frequency and closeness of waves. [[PAGE:112]] HESI A2 Actual Exam
• The oncoming sound waves have a higher pitch because of low frequency and closeness of waves.
• The whistling sound of the locomotive as it approaches and passes can be explained by the Doppler effect.
• The high-pitched sound of the ambulance as it approaches and passes can be explained by the Doppler effect.

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• thoughtful
• confined
• hostile
• perfect