necessary life functions 8

Question 1

maintaining boundaries

Answer 1

internal environment remains distinct from external environment
cells - permeable membrane
body - skin

Question 2

movement

Answer 2

general movement
skeletal system - framework muscles pull on it as they work
movement of bodily fluids through systems
cellular level- muscle cell ability to move by shortening (contractility)

Question 3

contractility

Answer 3

cellular level- muscle cell ability to move by shortening

Question 4

responsiveness or excitability

Answer 4

ability to sense changes and then respond to them
reflexes
nervous system most involved

Question 5

digestion

Answer 5

breaking down of ingested foodstuffs to simple molecules can be absorbed into the blood

Question 6

metabolism

Answer 6

“a state of change” all chemical reactions that occur in within the body cells
depends on the digestive and respiratory systems to make nutrients and O2 available to cardiovascular system
regulated by hormones secreted by endocrine system glands

Question 7

catabolism

Answer 7

in metabolism breaking down substances into their simpler building blocks

Question 8

anabolism

Answer 8

in metabolism synthesizing more complex cellular structures from simpler structures

Question 9

excretion

Answer 9

process of removing wastes from the body

Question 10

reproduction

Answer 10

occurs at cellular and organismal level
cellular reproduction
reproduction (human)

Question 11

growth

Answer 11

an increase in size of body part or the organism as a whole

usually done by increasing the # of cells

Question 12

true growth

Answer 12

constructive activities must occur faster than destructive ones