HESI A2
HESI A2 Anatomy and Physiology Practice Test 2023
1. 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.
2. Which fibrous connective tissue attaches muscles to bones?
- A. Tendons
- B. Ligaments
- C. Cartilage
- D. Fascia
Correct answer: A
Rationale: Tendons are fibrous connective tissues that attach muscles to bones, allowing the transmission of forces generated by muscles and facilitating movement at joints. Ligaments, on the other hand, connect bones to other bones, providing stability. Cartilage is a firm, flexible connective tissue found in joints and the respiratory tract. Fascia surrounds muscles, groups of muscles, blood vessels, and nerves, offering support and protection. Therefore, the correct answer is tendons as they specifically connect muscles to bones.
3. Which hormone is produced by the pancreas to lower blood glucose levels?
- A. Glucagon
- B. Insulin
- C. Cortisol
- D. Melatonin
Correct answer: B
Rationale: The correct answer is B: Insulin. Insulin, produced by the pancreas, is the hormone responsible for lowering blood glucose levels. It achieves this by promoting the uptake of glucose into cells, thereby reducing the concentration of glucose in the bloodstream. Choice A, Glucagon, is actually a hormone produced by the pancreas that works to raise blood glucose levels by stimulating the liver to release stored glucose. Choice C, Cortisol, is a hormone produced by the adrenal glands, not the pancreas, and is involved in stress response and regulation of metabolism. Choice D, Melatonin, is a hormone produced by the pineal gland that regulates sleep-wake cycles and is not directly involved in blood glucose level regulation.
4. What is the function of the large intestine in the digestive system?
- A. To secrete digestive enzymes
- B. To absorb water and form solid waste
- C. To produce bile
- D. To transport nutrients
Correct answer: B
Rationale: The large intestine's primary function is to absorb water from the remaining indigestible food matter that enters it from the small intestine. This absorption process helps in forming solid waste (feces) by compacting the material and preparing it for excretion. The large intestine does not secrete digestive enzymes, produce bile, or transport nutrients. Therefore, option B, 'To absorb water and form solid waste,' is the correct function of the large intestine in the digestive system.
5. What is the primary function of white blood cells?
- A. To carry oxygen
- B. To fight infections
- C. To transport nutrients
- D. To clot blood
Correct answer: B
Rationale: White blood cells, also known as leukocytes, play a crucial role in the immune system by primarily fighting off infections caused by pathogens like bacteria, viruses, and other invaders. They help the body recognize and destroy these harmful agents, contributing to the body's defense mechanisms against diseases. Choice A is incorrect because the primary function of red blood cells, not white blood cells, is to carry oxygen. Choice C is incorrect as the transportation of nutrients is mainly carried out by the bloodstream as a whole, not specifically by white blood cells. Choice D is incorrect as the process of blood clotting is primarily managed by platelets in the blood, not white blood cells.
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