(A) ADH (B)Aldosterone (C)Renin (D)cortoon 19 Which structure carries urine from the kidney to the bladder? (A) Urethra (B)Ureter (C) Renal vein (D) Renal artery 20 Which structure in the nephron is impermeable to water? (A) Proximal tubule (B)Descending limb of the loop of Henle (C) Ascending limb of the loop of Henle (D)Distal tubule 21. Which part of the nephron is most responsible for the reabsorption of glucose? (A) Glomerulus (B) Proximal tubule (C) Distal tubule (D)Loop of Henle 22. Which part of the digestive system is the primary site for nutrient absorption? (A) Stomach (B)Large intestine (C) Small intestine (D)Esophagus 23. What is the function of bile in the digestive system? (A) Digest proteins (B)Emulsify fats (C)Neutralize stomach acid (D) Absorb nutrients 24.Which hormone stimulates the release of gastric acid in the stomach? (A) Insulin (B)Secretin (C)Gastrin (D)Cholecystokinin 25. What is the primary role of the large intestine in digestion? (A) Absorb nutrients (B)Digest proteins (C) Reabsorb water and electrolytes (D) Break down fats 26. What is the function of the villi in the small intestine? (A) Store digestive enzymes (B)Increase surface area for absorption (C) Secrete digestive hormones (D)Transport bile 27. What is the basic functional unit of the nervous system? (A) Neuron (B)Synapse (C)Axon (D)Dendrite 28. Which type of glial cell forms the myelin sheath in the central nervous system (CNS)? (A) Schwann cell (B)Oligodendrocyte (C) Microglia (D) Astrocyte 29. What is the term for the electrical charge that travels along the axon during a nerve impulse? (A) Synaptic potential (B)Resting potential (C)Action potential (D)Graded poten 30. What happens during depolarizatio of a neuron? (A) The inside of the neuron becomes more negative (B)Sodium ions enter the neuro (C) Potassium ions exit the neuron (D)The neuron returns to resting potential 31. Which part of the neuron is responsible for transmitting signals away from the cell body (A) Dendrite (B) Axon (C)Synapse (D)Soma