HESI A2
HESI A2 Anatomy and Physiology 2023
1. Where will a person who has damage to their ulnar nerve experience decreased sensation?
- A. Leg
- B. Arm
- C. Face
- D. Abdomen
Correct answer: B
Rationale: The ulnar nerve innervates the forearm and hand, specifically providing sensation to the ring and little fingers. Damage to this nerve can lead to decreased sensation in these areas, making the arm the correct answer. Choices A, C, and D are incorrect because the ulnar nerve does not supply sensation to the leg, face, or abdomen.
2. Which type of tissue connects bones to other bones?
- A. Tendons
- B. Ligaments
- C. Cartilage
- D. Muscles
Correct answer: B
Rationale: The correct answer is B: Ligaments. Ligaments are tough, flexible connective tissues that connect bones to other bones, providing stability and support to joints. Tendons (choice A) connect muscles to bones, enabling movement. Cartilage (choice C) is a firm, rubbery material that cushions bones at joints. Muscles (choice D) are contractile tissues responsible for movement. Therefore, when looking for the tissue that connects bones to other bones, ligaments are the most appropriate choice.
3. What is the main function of the nervous system?
- A. Transporting blood
- B. Protecting the body from infection
- C. Regulating body temperature
- D. Digesting food
Correct answer: C
Rationale: The main function of the nervous system is to control and coordinate body activities by transmitting signals between different parts of the body and responding to internal and external stimuli. This allows for the regulation of body temperature, movement, sensory perception, and various other functions necessary for homeostasis. Choices A, B, and D are incorrect as they do not align with the primary role of the nervous system. Transporting blood is mainly carried out by the circulatory system, protecting the body from infection is a function of the immune system, and digesting food is the role of the digestive system.
4. What is the primary function of the circulatory system?
- A. To produce hormones
- B. To transport oxygen and nutrients
- C. To fight infections
- D. To regulate body temperature
Correct answer: B
Rationale: The circulatory system's primary function is to transport oxygen, nutrients, and hormones to cells and remove waste products. Choice A is incorrect because hormone production is primarily carried out by endocrine glands. Choice C is incorrect as fighting infections is a role of the immune system. Choice D is incorrect as regulating body temperature is mainly controlled by the integumentary and nervous systems.
5. The coronal plane of the body may also be called the ___________ plane.
- A. sagittal
- B. median
- C. frontal
- D. axial
Correct answer: C
Rationale: The correct answer is C: frontal. The coronal plane of the body is also known as the frontal plane. This plane divides the body into front (anterior) and back (posterior) sections. It is perpendicular to the sagittal plane and divides the body into front and back portions. The term 'coronal' is often used in radiology and anatomy to describe this specific anatomical plane. Choices A, B, and D are incorrect because the sagittal plane divides the body into left and right portions, the median plane is another name for the sagittal plane, and the axial plane is a term less commonly used to describe an anatomical plane.
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