Frequently tested HESI A2 Practice test questions and answers. Verified

Which organ is primarily responsible for filtering blood and forming urine? A. Liver B. Heart C. Kidneys D. Lungs ️️ C. Kidneys What is the basic unit of life? A. Atom B. Cell C. Tissue D. Organ ️️ B. Cell Which vitamin is essential for calcium absorption? A. Vitamin A B. Vitamin C C. Vitamin D D. Vitamin K ️️ C. Vitamin D What is the normal pH range of human blood? A. 6.8–7.0 B. 7.35–7.45 C. 7.5–7.8 D. 6.0–6.5 ️️ B. 7.35–7.45 Which chamber of the heart pumps oxygenated blood to the body? A. Right atrium B. Right ventricle C. Left atrium D. Left ventricle ️️ D. Left ventricle What is the primary function of red blood cells? A. Fight infection B. Transport oxygen C. Clot blood 2 D. Produce hormones ️️ B. Transport oxygen Which part of the brain controls balance and coordination? A. Cerebrum B. Medulla C. Cerebellum D. Hypothalamus ️️ C. Cerebellum Which electrolyte is most abundant inside cells? A. Sodium B. Potassium C. Calcium D. Chloride ️️ B. Potassium What is the term for difficulty breathing? A. Apnea B. Dyspnea C. Tachycardia D. Bradycardia ️️ B. Dyspnea Which hormone regulates blood sugar levels? A. Thyroxine B. Insulin C. Estrogen D. Cortisol ️️ B. Insulin Which organ produces bile? A. Pancreas B. Liver C. Stomach D. Gallbladder ️️ B. Liver What is the largest organ in the human body? A. Liver B. Brain C. Skin D. Lungs ️️ C. Skin 3 Which structure connects muscle to bone? A. Ligament B. Tendon C. Cartilage D. Fascia ️️ B. Tendon What is the main function of white blood cells? A. Oxygen transport B. Nutrient storage C. Immune defense D. Hormone secretion ️️ C. Immune defense Which gas is primarily removed during exhalation? A. Oxygen B. Nitrogen C. Carbon dioxide D. Hydrogen ️️ C. Carbon dioxide What is the normal resting heart rate for adults? A. 40–60 bpm B. 60–100 bpm C. 100–140 bpm D. 120–160 bpm ️️ B. 60–100 bpm Which system controls voluntary movements? A. Autonomic nervous system B. Somatic nervous system C. Endocrine system D. Lymphatic system ️️ B. Somatic nervous system Which part of the digestive system absorbs most nutrients? A. Stomach B. Large intestine C. Small intestine D. Esophagus ️️ C. Small intestine What is the medical term for high blood pressure? A. Hypotension B. Hypertension 4 C. Hyperglycemia D. Hypoglycemia ️️ B. Hypertension Which structure prevents food from entering the airway? A. Uvula B. Epiglottis C. Tonsils D. Pharynx ️️ B. Epiglottis What type of joint is the shoulder?