Necessary Life Functions Flashcards
What are the necessary life functions that human needs to maintain life
Maintaining Boundaries
Movement
Responsiveness
Digestion
Metabolism
Excretion
Reproduction
Growth
Every living organism must be able to maintain its __________ so that its “inside” remains distinct from its “outside”.
Maintaining Boundaries
Every cell of the human body is surrounded by an ______________ that separates its contents from the outside interstitial fluid (fluid between cells) and allows entry of ________________ while generally preventing entry of _______________ or unnecessary substances.
external membrane
needed substances
potentially damaging
what is the integumentary system’s purpose in maintaining boundaries?
The integumentary system protects internal organs from drying out, from pathogens, and from the damaging effects of heat sunlight, and an unbelievable number of chemical, substances in the external environment.
Includes all the activities promoted by the muscular system.
Movement
The ability to sense changes (stimuli) in the environment and then react to them.
Responsiveness
Nerve cells are highly irritable and can communicate rapidly with each other. The nervous system bears the major responsibility for ___________
Responsiveness
The process of breaking down ingested food into simple molecules that can then be absorbed into the blood.
Digestion
A broad term that refers to all chemical reactions that occur within the body and all of its cells.
Metabolism
It includes breaking down complex substances into simpler building blocks (as in digestion), making larger structures from smaller ones.
Metabolism
The process of removing waste from the body.
The digestive system rids the body of indigestible food residues in feces.
excretion
The production of offspring can occur on the cellular and organismal level.
Reproduction
In the cellular reproduction, the original cell divides, producing two identical daughter cells that may be then used for body growth and repair.
Reproduction
It can be an increase in cell size or an increase in body size that is usually accomplished by an increase in the number of cells
Growth
