HESI A2 Vocabulary 2023

Correct Answer: A

Rationale: The correct answer is A: magnesium. Magnesium is an essential electrolyte in the human body, playing a crucial role in nerve function, muscle contraction, and maintaining a healthy heart rhythm. It is commonly found in bones and helps regulate blood pressure. Choice B: manganese is not a primary electrolyte in the human body, though it is an essential trace mineral. Choice C: magnetite is a type of mineral and not an electrolyte found in the human body. Choice D: manganite is a mineral compound and not an electrolyte present in the human body.

Correct Answer: A

Rationale: The correct answer is A: A test of brain activity. EEG stands for Electroencephalogram, which is a test that measures electrical activity in the brain. This test is commonly used to diagnose epilepsy, sleep disorders, and other neurological conditions. Choice B is incorrect as EEG is not a service but a diagnostic test. Choice C is incorrect as EEG does not monitor heartbeats. Choice D is incorrect as EEG has no relation to dentistry. EEG specifically focuses on brain activity, making choice A the most appropriate description.

Correct Answer: C

Rationale: The correct answer is C: To dispute the truth of. Impugn means to challenge the validity or truthfulness of something. This is the correct answer because impugning involves questioning or casting doubt on the credibility of a statement or claim. A: To instill with - This choice is incorrect because instill means to introduce gradually, which is not related to the meaning of impugn. B: To instruct about - This choice is incorrect because instruct means to teach or provide information, not to challenge the truth of something. D: To lament or complain about - This choice is incorrect because lamenting or complaining is about expressing sorrow or dissatisfaction, not about disputing the truth of something.

Correct Answer: A

Rationale: The term 'superior' in anatomy refers to a structure being located above another structure. In the human body, 'superior' typically refers to the top part. For example, the head is superior to the neck. Therefore, the correct answer is A: Top. - B: Bottom is incorrect as 'inferior' is used to refer to the lower part. - C: Front is incorrect as 'anterior' is used to describe the front part. - D: Back is incorrect as 'posterior' is used to describe the back part.

Correct Answer: B

Rationale: The correct answer is B: Radius. In the forearm, the radius is shorter than the ulna. The radius is located on the same side as the thumb, while the ulna is on the side of the pinky finger. The humerus is the upper arm bone, the scapula is the shoulder blade, and the fibula is a bone in the lower leg. So, the radius is the only bone among the choices that is actually located in the forearm and is shorter than its counterpart, the ulna.