Homeostasis

Homeostasis for living organisms means...

• external environment stays the same when internal changes

• water diffuses through membrane by osmosis

• concentrations move from high to low

• internal environment stays the same when external changes

Tags

NGSS.HS-LS1-3

Cells are sensitive to the environment. Which is NOT a factor that would influence enzymes

• Temperature

• Gravity

• Salinity

• Light

Enzymes are

• important for speeding up reactions like metabolism

• only found in warm blooded animals

• in control what comes in and out of the cell

• not important for life functions

At extreme temperatures, many enzymes...

• speed up reactions

• slow down reactions

• stop working properly

• all of the above

Tags

NGSS.HS-PS1-5

Metabolic rates typically are _____ at higher temperature and _____ at lower temperature.

• slower; faster

• faster; slower

• the same speed

• faster; faster

Diffusion is when molecules...

• are water molecules and move across the cell membrane

• move from a gradient of low to high concentration

• are pumped across the cell membrane

• move from a gradient of high to low concentration

Osmosis is when..

• water passively moves across the cell membrane

• ions are pumped across the cell membrane

• some substances leave the cell and others can not

• all of the above

Tags

NGSS.MS-LS1-2

Warm Blooded means animals are...

• ectotherm, homeotherm

• ectotherm, heterotherm

• endotherm, heterotherm

• endotherm, homeotherm

Surface area to volume ratio is important because

• it determines how big a cell can grow to be

• it affects how fast/slow cells can diffuse nutrients & heat

• it determines which enzymes are needed for metabolism

• it determines what kind environment the cell needs to live

All 3 are correct in regards to surface area to volume ratio being TOO SMALL EXCEPT

• Cell size is limited by diffusion

• Livings cells can not remove waste before toxins build up

• Living cells can not operate in certain metabolic ranges

• Living cells can not get nutrient for respiration and growth