Anatomy HESI A2

Correct Answer: B

Rationale: The correct answer is B: In the nervous system. Schwann cells are a type of glial cell that provide support and insulation to nerve cells in the nervous system. They form the myelin sheath around axons, which helps in the transmission of nerve impulses. Schwann cells are not found in the digestive system (A), skeletal system (C), or muscular system (D) as they are specifically related to the nervous system. This distinction makes option B the correct choice.

Correct Answer: D

Rationale: The correct answer is D: reproductive system. The ovaries are part of the female reproductive system responsible for producing eggs and hormones like estrogen and progesterone. They play a crucial role in the process of reproduction. The other choices are incorrect because: A: The skeletal system consists of bones and is not related to the ovaries. B: The nervous system includes the brain, spinal cord, and nerves, which are not related to the ovaries. C: The lymphatic system is responsible for immune response and fluid balance, not related to the ovaries.

Correct Answer: A

Rationale: The correct answer is A: Somatic. The femoral, radial, and ulnar nerves are all part of the peripheral nervous system, specifically the somatic nervous system. This system controls voluntary movements and sensory inputs. The other choices, Autonomic (B), Sympathetic (C), and Parasympathetic (D) are all part of the autonomic nervous system, which controls involuntary processes like heart rate and digestion. Therefore, the correct answer is A because the mentioned nerves are responsible for voluntary movement and sensation, fitting within the somatic nervous system.

Correct Answer: A

Rationale: The correct answer is A because a sagittal section divides the body into right and left regions along the sagittal plane, which runs from front to back, dividing the body into symmetrical halves. Choice B is incorrect as it refers to a transverse section dividing the body into upper and lower regions. Choice C is incorrect as it describes a frontal section dividing the body into front and back regions. Choice D is incorrect as it pertains to the division between the dorsal and ventral cavities, not the body as a whole.

Correct Answer: B

Rationale: The correct answer is B: Tympanic membrane. The tympanic membrane, also known as the eardrum, is the most medial structure in the ear. It separates the outer ear from the middle ear and plays a crucial role in transmitting sound vibrations. The pinna (A) is the external part of the ear, the cochlea (C) is a spiral-shaped structure in the inner ear responsible for hearing, and the outer canal (D) is a passage leading to the eardrum. These structures are more lateral to the tympanic membrane in the ear anatomy.