Zoology Exam 5 Study guide (1)

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Homeostasis
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1

The continuous Balancing and rebalancing physiological process

Homeostasis

2

What is the function of Homeostasis?

It maintains stability of internal environment.

3

Hemeostasis responds to what?

External Environment.

4

Metabolism requires what?

Supply of material

5

Homeostatis requires what?

Coordination of body systems.

6

the spontaneous movement of particles from an area of high concentration to an area of low concentration

Diffusion

7

The spontaneous net movement of solvent molecules through a semi-permeable membrane into a region of higher solute concentration, in the direction that tends to equalize the solute concentrations on the two sides.

Osmosis

8

The Active process of Regulating water content

Osmotic Regulation

9

The tendency to take water by osmosis.

Osmotic pressure

10

Measure of Osmotic pressure gradient across semipermeable membrane.

Tonicity

11

Having no Gradient and solutes equal on each side of membrane

Isotonic

12

Having a higher concentration of solutes outside the membrane

Hypertonic

13

Having a lower concentration of solutes outside the membrane.

Hypotonic

14

Marine organisms that maintain an internal environment that is isosmotic to their external environment.

Osmoconformer

15

Organisms that maintain equilibrium with seawater.

Osmoconformer

16

Tolerates wide range of Salinity.

Euryhaline

17

Tolerates narrow salinity range

Stenohaline

18

The Internal environment of a _______________ __________________ has more solutes relative to outside.

Hyperosmotic Regulator

19

In a Hyperosmotic Regulator, water is gained by what?

Diffusion

20

In a Hyperosmotic Regulator, what happens during excretion?

Salt is lost

21

Describe the 4 Diffusion and Excretion processes in a hyperosmotic regulator

  1. Ions are actively transported across the gills
  2. Water Diffuses across the skin
  3. Kidneys reabsorb salts
  4. Dilute Urine is excreted
22

Which organisms have Hyperosmotic regulators?

  • FW insects
  • Crustaceans
  • Molluscs
  • Amphibians
23

Most invertebrate Marine Animals, including Hagfish are what?

Isoosmotic

24

Osmoregulation in Marine Animal results in the loss of what?

water

25

The internal environment of Marine Animals is what?

Hypoosmotic.

26

Describe the urine Production of Marine Animals.

They produce very little of it

27

Marine Animals Actively secrete what from their Gills and Kidneys?

Ions

28

Ions are actively secreted From what in Marine Animals?

Gills and Kidneys

29

Marine Animals drink what?

seawater

30

In Terrestial Animals, water is lost how?

via Respiration and Excretion

31

Terrestial Animals adapt to do what?

Obtain and Retain Water