PSL 310 Exam with 100% correct answers 2024

Physiology correct answers The study of the function of the human body (how it works) Anatomy correct answers The study of the structure of the human body (how it looks) Homeostasis correct answers The maintenance of a relatively constant internal environment, fluctuates but within narrow limits Negative Feedback correct answers Feedback that includes a counter reaction that corrects the disturbance (is opposite) and keeps variables within their narrow limits. Happens constantly in the body. Ex: thermostat, blood pressure Afferent Pathway correct answers In negative feedback, the path from the sensor to the control center (to the CNS) Efferent Pathway correct answers In negative feedback, the path from the CNS to the effector Effector correct answers In negative feedback this causes the effect/response to the disturbance (often muscle/gland cells) Control (Integrating) Center correct answers In negative feedback this compares the input (actual value) from the senor to the set point (desired value) and sends command Positive Feedback correct answers Feedback in which the direction of the response is the same as the direction of the disturbance, creates a viscous cycle. Ex: labor Feedforward Mechanisms correct answers Mechanisms in which the response occurs before the disturbance making the variable fluctuate in more narrow limits. Ex: GI tract secreting hormones before you eat to prepare for when the food is in the stomach Behavioral Adaptations correct answers These actions can reduce the controlled variable fluctuations. Ex: wearing a coat Intracellular Fluid (ICF) correct answers Fluid inside the cells Extracellular Fluid (ECF) correct answers Also called the internal environment, the fluid outside the cells, made of ISF (intertitial fluid) and plasma (fluid of the blood) Body Systems correct answers A collection of organs which together perform a function for the body