NAS 2 Challenge Exam Complete Guide (2025/2026 Update) Questions and Verified Answers| 100% Correct Solutions

NAS 2 Challenge Exam Complete Guide (2023/2024 Update) Questions and Verified Answers| 100% Correct Solutions Q: 11 organ systems of the human body Answer: integumentary, skeletal, m nervous, endocrine, cardiovascular, lymphatic, respiratory, digestive, urinary, reproductive Q: integumentary system Answer: Consists of the skin, mucous membranes, hair, and nail Q: skeletal system Answer: Protects and supports body organs and provides a framework the muscles use to support movement. Made up of bones and joints Q: Muscular System Answer: Consists of skeletal muscles, tendons that connect muscles to bones, and ligaments that attach bones together to form joint Q: nervous system Answer: the body's speedy, electrochemical communication network, consisting of all the nerve cells of the peripheral and central nervous systems Q: endocrine system Answer: the body's "slow" chemical communication system; a set of glands that secrete hormones into the bloodstream Q: cardiovascular system Answer: The transport system of the body responsible for car- rying oxygen and nutrients to the body and carrying away carbon dioxide and other wastes; composed of the heart, blood vessels, and blood. Q: lymphatic system Answer: Composed of a network of vessels, ducts, nodes, and organs. Provides defense against infection. Q: respiratory system Answer: Body system consisting of the lungs and air passages; enables breathing, supplying the body with oxygen and eliminating carbon dioxide wastes. Q: digestive system Answer: Breaks down food into absorbable units that enter the blood for distribution to body cells. Q: urinary system Answer: Eliminates nitrogenous wastes from the body. Regulates water, electrolyte and acid-base balance of the blood. Q: reproductive system Answer: Reproduce offspring- produce male sex cells (sperm) and female sex cells (oocytes) Q: potential energy Answer: Energy that is stored and held in readiness Q: kinetic energy Answer: the energy an object has due to its motion Q: Atom structure Answer: protons, neutrons, electrons Q: Protons Answer: Positively charged particles Q: Neutrons Answer: the particles of the nucleus that have no charge Q: Electrons