Chapter 6

Question 1

Aquatic organisms have to deal with 2 things

Answer 1

1. water availability

2. salinity

Question 2

Water available it is affected by 2 things

Answer 2

1. Water gain

2. Water loss

Question 3

2 things that effect water gain and water loss are:

Answer 3

1. Temperature and humidity

2. Evaoparation

Question 4

Concentration gradients

Answer 4

Influence the movement of water between and organism and the environment

Question 5

Increased water vapor in air( humidity) leads to

Answer 5

Decreased evaporation rates

Question 6

Decreased water vapor int he air(humidity) leads to

Answer 6

Increased evaporation rates

Question 7

Possible methods terrestrial animals use to obtain water

Answer 7

1. Drinking
2. Metabolic water
3. root systems
4. absorbtion through skin

Question 8

Metabolic water

Answer 8

The water an organism produces internally by metabolizing food

Question 9

Possible methods terrestrial organisms use to conserve water

Answer 9

1. waxy cuticles
2. exoskelotons
3. vaculos
4. Closing stomata

Question 10

Root systems in dry soils compared to moist soils

Answer 10

Dry: extensive, need t be able to tap into the water table which is lower

Moist: shallow, Water able is high so they don’t need ot be as long

Question 11

2 main mechanisms terrestrial organisms get rid of water

Answer 11

1. Urination/excretion

2. Evaporation

Question 12

Other mechanisms for how terrestrial organisms get rid of water:

Answer 12

• crying
• breathing
• sweating
• transpiration
• active transport through cell membranes

Question 13

Oquatic organisms have to deal with balancing

Answer 13

Salinity

Question 14

Osmosis

Answer 14

The process by which after travels along a concentration gradient in order to regulate homeosastis

Question 15

Isosmotic

Answer 15

-organisms w/ body fluids containing the same concentration of water and solutes as the external environment

Question 16

Hypoosmotic

Answer 16

• organisms with body fluids having higher concentrations of water and lower concentrations of solutes than surrounding environment
• organisms loose water more readily than they gain water

Question 17

Hyperosmotic

Answer 17

-organisms with body fluids containing a lower concentration of water and hoigher concentration of solutes than the surrounding environment