Exam Questions and CORRECT Answers
pyrogens - CORRECT ANSWER - cause a rise in the setpoint for metabolic heat
production
3 things that homeostatic control systems must be able to do - CORRECT ANSWER -
detect, integrate, restore
pathophysiology - CORRECT ANSWER - abnormal functioning of the body associated
with disease, disruption in homeostasis of any vital parameter can lead to illness and death
homeostatic redundancy - CORRECT ANSWER - the more vital the parameter is, the
more systems the body mobilizes to regulate it
homeostatic competition - CORRECT ANSWER - feedback loops may have opposite
effects
adaptability - CORRECT ANSWER - flexibility of feedback loops allows for many forms
of physiological adaptation or acclimatization
negative feedback - CORRECT ANSWER - opposes initial change
sensor - CORRECT ANSWER - detects change
integrator - CORRECT ANSWER - control center, compared sensor's input with a set
point
effector - CORRECT ANSWER - receives information and responds, returns variable to
homeostasis
, addison's disease - CORRECT ANSWER - primary hypoadrenocorticism
positive feedback - CORRECT ANSWER - amplifies an initial change
examples of positive feedback - CORRECT ANSWER - parturition, depolarization during
action potentials
feedforward - CORRECT ANSWER - change of systems in anticipation if an event
properties of particle that influence whether they can permeate the cell membrane without
assistance - CORRECT ANSWER - relative solubility of particle in lipid, size of particle
factors that increase diffusion - CORRECT ANSWER - concentration gradient, surface
area of membrane, lipid solubility
factors that decrease membrane solubility - CORRECT ANSWER - molecular weight of
substance, distance
ion channels - CORRECT ANSWER - allow many ions to flow at once but it specific to
that ion
why do ions need their on channels? - CORRECT ANSWER - they can't move through
lipids
facilitated diffusion - CORRECT ANSWER - carrier mediated, requires a conformational
change
what kind of transport does GLUT1 use? - CORRECT ANSWER - facilitated diffusion