where would you be likely to find a schwann cell

HESI A2

Anatomy HESI A2

1. Where would you be likely to find a Schwann cell?

A. In the digestive system
B. In the nervous system
C. In the skeletal system
D. In the muscular system

Correct answer: B

Rationale: Schwann cells are a type of neuroglia found in the peripheral nervous system. They are responsible for producing the myelin sheath around axons of neurons, which helps with the conduction of nerve impulses. Therefore, Schwann cells are typically found in the nervous system. Choices A, C, and D are incorrect because Schwann cells are specifically associated with the nervous system and are not found in the digestive, skeletal, or muscular systems.

2. What is the product of 375 and 2.3?

A. 862.5
B. 750
C. 225.75
D. 1125

Correct answer: A

Rationale: To find the product of 375 and 2.3, multiply them: 375 × 2.3 = 862.5. When multiplying by 2.3, it is important to shift the decimal point appropriately after performing the calculation. Choice A, 862.5, is the correct answer. Choice B, 750, is incorrect because it is the result of multiplying 375 by 2. Choice C, 225.75, is incorrect as it appears to be the result of multiplying the numbers in the wrong order. Choice D, 1125, is incorrect as it seems to be the result of multiplying 375 by 3 instead of 2.3.

3. Genes control heredity in man and other organisms. This gene is ___

A. A segment of DNA
B. A bead-like structure on the chromosomes
C. A protein molecule
D. A segment of RNA

Correct answer: A

Rationale: Genes are sections of DNA that contain instructions for building and operating living organisms. These sections of DNA contain the genetic information that is passed on from one generation to the next. Genes are composed of specific sequences of nucleotides within the DNA molecule. Therefore, genes are best described as segments of DNA. Choice A is correct. Choice B is incorrect because genes are not bead-like structures on chromosomes but specific sequences of DNA. Choice C is incorrect because genes are not protein molecules but rather sequences of nucleotides. Choice D is incorrect because genes are not segments of RNA but DNA.

4. What is the best description for the word 'distal'?

A. Receives blood from lungs
B. Farthest from injury
C. Closest to heart
D. Empathetic

Correct answer: B

Rationale: The correct answer is B: 'Farthest from injury.' In medical terminology, 'distal' refers to the body part that is farthest from the point of reference or injury. The term is commonly used to describe the location of structures in relation to a point of origin or attachment. Choices A, C, and D are incorrect because 'distal' specifically denotes a spatial relationship in terms of distance from a point of reference, not blood flow, proximity to the heart, or emotional empathy.

5. Select the word that means 'a violent seizure.'

A. revelation
B. nutrient
C. contraption
D. paroxysm

Correct answer: D

Rationale: 'Paroxysm' is the correct answer as it refers to a sudden, violent seizure or outburst. The other choices are incorrect because 'revelation' means a surprising and previously unknown fact, 'nutrient' refers to a substance that provides nourishment, and 'contraption' means a machine or device that is strange or unnecessarily complicated.