BIO 141 EXAM 1 2025/2026 BANK CURRENTLY TESTING COMPLETE ACTUAL QUESTIONS WITH DETAILED VERIFIED ANSWERS EXPERT VERIFIED /ALREADY GRADED A+

1. The study of the structure and shape of the body and its parts is called: a) Physiology b) Homeostasis c) Anatomy d) Pathology ....ANSWER....c) Anatomy 2. Which of the following is the simplest level of structural organization in the human body? a) Tissue level b) Cellular level c) Chemical level d) Organ level ....ANSWER....c) Chemical level 3. A structure composed of two or more tissue types that performs a specific function for the body is a(n): a) Organ system b) Organ c) Organism d) Cell ....ANSWER....b) Organ 4. The system that takes in nutrients, breaks them down, and eliminates unabsorbed matter is the: a) Respiratory system b) Digestive system c) Urinary system d) Endocrine system ....ANSWER....b) Digestive system 5. The ability of the body to maintain a relatively stable internal environment is called: a) Metabolism b) Homeostasis c) Responsiveness d) Differentiation ....ANSWER....b) Homeostasis 6. Which of the following is the correct order of elements in a homeostatic control system? a) Receptor, control center, effector b) Effector, control center, receptor c) Control center, receptor, effector d) Receptor, effector, control center ....ANSWER....a) Receptor, control center, effector 7. In a feedback system, the structure that processes the signal and sends instructions is the: a) Receptor b) Stimulus c) Effector d) Control center ....ANSWER....d) Control center 8. Most homeostatic control mechanisms in the body are: a) Positive feedback loops b) Negative feedback loops c) Feed-forward loops d) Disease mechanisms ....ANSWER....b) Negative feedback loops 9. Blood clotting and childbirth are examples of: a) Negative feedback b) Homeostatic imbalance c) Positive feedback d) Dynamic equilibrium ....ANSWER....c) Positive feedback 10. The dorsal body cavity contains the: a) Thoracic and abdominopelvic cavities b) Cranial and vertebral cavities c) Pleural and pericardial cavities d) Abdominal and pelvic cavities ....ANSWER....b) Cranial and vertebral cavities 11. The ventral body cavity is subdivided by the diaphragm into the: a) Cranial and vertebral cavities b) Thoracic and abdominopelvic cavities c) Pleural and pericardial cavities d) Pelvic and abdominal cavities ....ANSWER....b) Thoracic and abdominopelvic cavities 12. The serous membrane that lines the wall of a body cavity is the: a) Visceral layer b) Parietal layer c) Mucous layer d) Cutaneous layer ....ANSWER....b) Parietal layer 13. The heart is located in the: a) Pleural cavity b) Pericardial cavity c) Mediastinum d) Both b and c ....ANSWER....d) Both b and c 14. The navel is __________ to the breastbone. a) Superior b) Inferior c) Lateral d) Medial ....ANSWER....b) Inferior 15. The term that describes a structure closer to the point of attachment of a limb is: a) Distal b) Lateral c) Proximal d) Superficial ....ANSWER....c) Proximal 16. A frontal (coronal) section divides the body into: a) Superior and inferior parts b) Anterior and posterior parts c) Right and left parts d) Proximal and distal parts ....ANSWER....b) Anterior and posterior parts 17. The region that contains the stomach is the: a) Hypogastric region b) Epigastric region c) Left iliac region d) Umbilical region ....ANSWER....b) Epigastric region 18. The study of how the body functions is called: a) Anatomy b) Histology c) Physiology d) Embryology ....ANSWER....c) Physiology 19. The cranial cavity houses the: a) Spinal cord b) Heart and lungs c) Brain d) Digestive organs ....ANSWER....c) Brain