Covers HESI A2 Math, Reading Comprehension, Vocabulary, Grammar, Biology, Chemistry, Anatomy and Physiology, and Physics.
AI tutor: 425 of 449 correct in a blind A&P and biology test (94.7%). See the test
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Try 25 practice questions · No sign upHESI A2 practice questions from the bank. Each card shows a wrong choice with its reason, then the right answer with its explanation.
The HESI A2: Your nursing program chooses the sections, questions and time
425 of 449 HESI A2-style science questions right in a blind test of the tutor’s AI model. See how it was tested
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Live demo · HESI A2
Tap an answer. Every option shows its reason, then the tutor replies.
Anatomy and Physiology
During auscultation of the heart, the first heart sound (S1), often described as the lub sound, marks the beginning of ventricular systole. Which event directly produces this sound?
Tap an answer.
Closure of the aortic and pulmonic valves produces S2, at the end of systole.
Valve opening is normally silent; heart sounds come from valves closing.
Rapid ventricular filling can produce S3, an extra sound in early diastole, not S1.
S1 occurs when rising ventricular pressure at the start of systole closes the mitral and tricuspid (atrioventricular) valves, preventing backflow into the atria.
Student asked: Why is it D?
AI tutor
To understand why D is the correct answer, let's break down what causes the "lub" sound.
The heart sounds we hear are primarily due to the closing of heart valves. There are two main heart sounds: S1 (lub) and S2 (dub).
Think about when the ventricles start to contract. What valves would need to close to prevent blood from flowing backward into the atria?
A real reply from the AI tutor, shortened. Every plan includes the tutor, up to 40 questions a day.
AI accuracy, not student pass rate
94.7%425 of 449 right
In a blind test, the AI model behind the tutor answered 425 of 449 HESI A2-style science questions correctly, without ever seeing the answer key.
425 right24 missed
Built for the HESI A2
Original practice questions written to the official content outline of the exam and reviewed before publishing.
Source: Elsevier HESI A2; each program chooses its sections.
The bank
405 distinct topics.
Section practice tests with answers and explanationsStudy guide
The HESI A2 study guide follows the test sections and is included with every plan.
No. Exam owners keep live questions confidential. These are original practice questions written to the official content outline of the exam and reviewed before publishing.
Questions and time are set by your nursing program. Source: Elsevier HESI A2; each program chooses its sections.
Math, Reading Comprehension, Vocabulary, Grammar, Biology, Chemistry, Anatomy and Physiology. Some programs add Physics. Source: Elsevier HESI A2; each program chooses its sections.
In a blind test, the AI model behind the tutor answered 425 of 449 HESI-style science questions correctly (94.7%) without ever seeing the answer key. It missed 24. The questions came from two open anatomy, physiology and biology textbooks, not from the HESI A2, and cover anatomy and physiology, biology and a little chemistry only (no physics, math or English questions). The result does not predict your score, and the test checks the answer letter, not the explanation the tutor writes. See the test
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