Anatomy and Physiology Hesi A2 Practice Test - Nurselytic

Correct Answer: B

Rationale: The correct answer is B: '
To break down food.' The stomach's primary function in digestion is to break down food mechanically and chemically. It accomplishes this by mixing food with gastric acid and digestive enzymes, resulting in the formation of chyme, a semi-liquid mixture that moves on to further digestion in the small intestine.
Choice A is incorrect because the absorption of nutrients occurs mainly in the small intestine, not in the stomach.
Choice C is incorrect because while the stomach does secrete digestive enzymes like pepsin, its primary role is not just limited to enzyme secretion.
Choice D is incorrect because the storage of glucose primarily occurs in the liver and muscles, not in the stomach.

Correct Answer: B

Rationale: Erythropoiesis specifically refers to the process of producing red blood cells (erythrocytes) in the bone marrow. Hematopoiesis is the broader term that encompasses the production of all types of blood cells, including red blood cells, white blood cells, and platelets. Phagocytosis is the process by which cells engulf and digest particles, while thrombopoiesis is the production of platelets.
Therefore, the correct answer is B as it directly relates to the production of red blood cells.

Correct Answer: B

Rationale: The correct answer is the Hyoid bone. The hyoid bone is distinctive as it does not directly articulate with any other bone in the body. Instead, it is held in place by muscles and ligaments, playing a crucial role in supporting the tongue and providing attachment points for various muscles involved in swallowing and speech. The other choices, Femur, Radius, and Tibia, all articulate with other bones in the body. The femur articulates with the hip bone, the radius articulates with the ulna and other bones in the wrist, and the tibia articulates with the femur and fibula.

Correct Answer: A

Rationale: Corrected
Rationale: Damage to the ulnar nerve typically results in decreased sensation in the hand, particularly affecting the little finger and half of the ring finger. The ulnar nerve innervates the hand and is responsible for providing sensation to these areas. This nerve does not extend to the leg or foot, so choices C and D are incorrect. While the ulnar nerve travels through the arm, its primary sensory impact is felt in the hand, making choice B less specific and therefore not the best answer.

Correct Answer: B

Rationale: The main function of the immune system is to protect the body from infections by identifying and destroying pathogens like bacteria and viruses. It plays a crucial role in maintaining overall health and preventing illnesses.
Choice A is incorrect because hormone production is primarily handled by the endocrine system, not the immune system.
Choice C is incorrect as waste removal is mainly performed by the excretory system, not the immune system.
Choice D is incorrect as regulating body temperature is primarily the role of the thermoregulatory system, not the immune system.