Necessary Life Functions & Survival Flashcards
let some substances in and keep some out
Maintaining Boundaries
Internal movement and ability to move through surroundings
Movement
Reacting to changes in the environment
Responsiveness
Breaking down and absorbing nutrients
Digestion
building larger molecules from smaller ones and breaking down of larger molecules into smaller ones
Metabolism
Removal of waste
Excretion
Production of offspring
Reproduction
Increase in cell size or overall body size
Growth
What are the 5 basic survival needs?
Nutrients, Oxygen, Normal body temp, Water, Normal Atmospheric pressure
Homeostasis
Maintaining stable conditions despite changes in your environment
Feedback mechanisms
Help maintain Homeostasis
Describe Negative feedback
Feedback inhibition, when the body becomes imbalanced receptors tell the brain and the brain sends signals to to different body systems, then they push to maintain homeostasis.
Give example of Negative Feedback
AC temperature control
Describe positive feedback
when something is broken in the body the body will push for body systems to heal what’s broken. it will keep pushing until its healed creates positive feedback loop
Give an example of Positive feedback.
blood vessel breaks, platelets are pushed to the area, then chemicals are released to attract more, this continues in the loop until the vessel is healed
