Homeostasis 9.3 and 9.4

Question 1

is the regulation of internal temperature by

Answer 1

negative feedback

Question 2

4 mechanisms of thermal energy exchange are

Answer 2

Conduction, Convection, Radiation, Evaporation,

Question 3

Homeotherms

Answer 3

Maintains their temperature regardless of the outside environment

Question 4

Poikilotherms

Answer 4

Body temperature varies and matches external environment

Question 5

Endotherm

Answer 5

maintains their temperature by internal mechanisms
ex. Shivering to generate thermal energy

Question 6

Ectotherm

Answer 6

maintains body temperature by absorbing thermal energy from the environment

Question 7

What is tonicity

Answer 7

The measure of the osmotic pressure gradient by two solutions separated by a semipermeable membrane

Question 8

Tonicity takes into consideration only the

Answer 8

non permeable solutes

Question 9

isotonic solution

Answer 9

solution and cellular contents are a similar concentration. No influx or efflux

Question 10

Hypertonic Solution

Answer 10

concentration of the solution is greater than the cell. Causes the cell to shrink

Question 11

Hypotonic Solution

Answer 11

Concentration of solution is less than cell so there will be an influx of water into the cell causing it to lyse.