physiology basics week 1 Flashcards
define homeo stasis
the maintenance of internal conditions and environment
what is steady state exercise
the state of equilibrium the body reaches when exercising
what factors of the body can change in homeostasis
bp, hr, temp
what is dynamic consistency
changes in arterial pressure at rest
what detects changes in bp
baroreceptors
what is the steady state when exercising
the plateau
what are the 2 control systems of the body
intracellular and organ systems
example of organ systems
respiratory / cardiovascular
example of intracellular control systems
protein breakdown and synthesis, energy production, maintaining stored nutrients
what are the 3 main parts of biological systems
sensors, effectors and control center
what are the 3 types of feedback
negative, positive and feedforward
what is negative feedback
reverses things so back to normal
example of negative feedback
reduces co2 build up
what is positive feedback
increases the original stimulus
example of positive feedback
labor - cervix receptors are stimulates to release oxytocin for uterine contractions
what is feedforward
The process in which one of the products of a metabolic pathway induces an enzyme which participates in the metabolic pathway
examples of homeostatic control
blood glucose, insulin needed
body temp
stress proteins repair proteins
exercise impacts the body’s control of homeostasis - true or false
true
what is adaptation
change in structure or function of cell or organ system to improve homeostasis
what is acclimation
adaptation to environmental stresses - heat or hypoxia
what is hormesis
a process in which low moderate dose of stress which could be harmful can result in beneficial adaptive response on cell or organ
what is inter cell signalling
cells communicating within the cell
what is intra cellular signaling
cells signaling to each other
what is juxtacrine signaling
chemical messengers passed between 2 connected cells
what is intracrine signaling
chemical signaling inside cell triggering response
what is autocrine signaling
chemical messenger acts on the same cell
what is paracrine signaling
CM acts on nearby cells
what is endocrine signaling
cm released into blood, affecting receptors specific to that hormone
