NUR 2063 / NUR2063: Essentials of Pathophysiology Exam 2 (Latest 2021 / 2022) Rasmussen

Pathophysiology basics a. Homeostasis i. What is it? equilibrium, balance, consistency, and stability. vital signs such as blood pressure, pulse, and temperature. ii. Why do we have this? self-regulating, give-and-take system that responds to minor changes in the body through compensation mechanisms. Compensation mechanisms attempt to counteract those changes and return the body to its normal state b. Adaptation to stress and illness i. Resilience: How one bounces back from sickness or illness ii. Adaptation: How one adapts to sickness iii. Maladaptation: Not adapting correctly c. Cellular structures & functions i. Ribosomes: make proteins, protein synthesis ii. Mitochondria: cell power plant, ATP is made iii. Lysosomes: breakdown cell products & foreign bodies iv. Cell membrane: semipermeable membrane surrounding the cytoplasm of a cell 1. Receptors: Ion channels, protein-linked signals, Enzyme-linked cell funtion 2. Passing ions/nutrients across membrane v. Atrophy vs. hypertrophy: Atrophy: cell decrease in size and function. Hypertrophy: overworked cells (heart disease), increase size vi. Hyperplasia vs. metaplasia vs dysplasia: Hyperplasia: overgrowth of tissues, increase workload. Metaplasia: change in cells, abnormal cells. Dysplasia: mutated abnormal size vii. Apoptosis: planned cell death-90 days then die viii. Cell death d/t necrosis: Necrotic: dead tissue (coagulative, liquefactive, caseous, fatty) ix. Gangrene—what it is & the presentation: dead tissue caused by an infection or lack of blood flow. Dry: coagulative Wet: liquefactive Gas: release of gas from decomposition into tissue