Water balance in animals Flashcards Preview

H Bio (Trad) - Unit 2 > Water balance in animals > Flashcards

Flashcards in Water balance in animals Deck (11)
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1
Q

The term used to compare the surroundings to a saltwater fish.

A

Surroundings are Hypertonic to the fish.

2
Q

The term used to compare the surroundings to a freshwater fish.

A

Surroundings are Hypotonic to the fish.

3
Q

A solution which has a lower water concentration than the solution it is being compared to.

A

Hypertonic

4
Q

A solution which has a higher water concentration than the solution it is being compared to.

A

Hypotonic

5
Q

Fish living in saltwater control their water balance in this way.

A

The fish must drink water, use active transport to pump salts out across the gills and produce a small volume of concentrated urine from a kidney with few glomeruli.

6
Q

Fish living in freshwater control their water balance in this way.

A

The fish use active transport to pump salts in across the gills and produce a large volume of dilute urine from a kidney with many glomeruli.

7
Q

The problems faced by a saltwater fish.

A

They lose water by osmosis and gain salts by diffusion,

8
Q

The problems faced by a freshwater fish.

A

They gain water by osmosis and lose salts by diffusion.

9
Q

Cells in the gills of fish that pump salts by active transport.

A

Chloride secretory cells

10
Q

The behavioural adaptations of a kangaroo rat.

A

The kangaroo rat sleeps in its burrow during the day and searches for food at night.

11
Q

The physiological adaptations of the kangaroo rat.

A

The kangaroo rat doesn’t sweat, produces very concentrated urine and reduces water loss during breathing.