Excretory system

Question 1

Purpose of excretory system

Answer 1

help maintain homeostasis in organisms by regulating water balance and by removing
harmful substances.

Question 2

Osmoregulation

Answer 2

is the absorption and excretion of water and dissolved substances (solutes) so that proper water balance (and osmotic pressure) is maintained between the organism and its surroundings

Question 3

Hypoosmotic

Answer 3

it is less salty than the surrounding water (body of marine fish)

Question 4

HYperosmostic

Answer 4

or saltier than the surrounding water (resh water fish)

Question 5

Examples of important excretory mechanisms

Answer 5

Contractile vacuoles, Flame cells, nephridia, Malpighian tubules

Question 6

Bowman’s capsule

Answer 6

The nephron tube begins with a bulb-shaped body at one end

Question 7

This is a winding tube that begins with the proximal convoluted tubule
at the Bowman’s capsule and ends with the distal convoluted tubule where it joins with the collecting duct

Answer 7

Convoluted tubule

Question 8

The distal convoluted tube empties into thist which descends in the same direction as the descending limb toward the center of the kidney

Answer 8

Collecting duct

Question 9

Operation of human nephron

Answer 9

Filtration, Secretion, Reabsorption

Question 10

increases the reabsorption of water by the body and increases the concentration
of salts in the urine.

Answer 10

Antidiuretic hormone

Question 11

increases both the reabsorption of water and the reabsorption of Na

Answer 11

Aldosterone