PSL 250 Exam 1 - Towse with correct answers 2024

Describe the scientific study of physiology correct answers The study of how the body works - Normal function of cells to the organism as a whole - Emphasizes mechanisms - how it works - Explained using cause and effect sequences - Derived from scientific experimentation What are the subdisciplines of physiology? correct answers Pathophysiology, Comparative physiology What is pathophysiology? correct answers how physiological processes are altered in disease or injury What is comparative physiology and how is it used? correct answers Differences and similarities in functions of invertebrates and vertebrates. Many pharmaceuticals are tested on other mammals before they are cleared for human trials. Describe the characteristics of the scientific method. correct answers - Make observations - Form a hypothesis → must be testable! - Design and conduct experiments - Analyze the findings of the experiment - Results must be replicated multiple times in order for a conclusion to be accepted as accurate and scientific - Verified hypotheses may become a general theory based on reproducible data Define homeostasis correct answers The internal environment of an organism is maintained constant by the function of cells, tissues, and organs via negative feedback systems. What is the pathway of a negative feedback loop? correct answers 1. Receptors → act as sensors and detect a change from the body's set point. Receptors send information to the: 2. Integrating centers → these assess change around the set point and send instructions to an: 3. Effector → a muscle or gland that adjusts to offset the deviation from the set point that was originally detected by a receptor What is a set point? correct answers the ideal normal value of a variable