Week 7

Question 1

Osmotic Pressure

Answer 1

Measure of a solution’s tendency to take in water by osmosis

Question 2

Osmolarity

Answer 2

Amount of osmotically active moles of solute per liter of solution

Question 3

Tonicity

Answer 3

Measure of a solution’s ability to change the volume of a cell by osmosis. (Hyper, Hypo, Iso)

Question 4

Osmoconformers

Answer 4

Organisms in osmotic equilibrium in their environment. Other vertebrates are osmoregulators.

Question 5

Protonephridia

Answer 5

Flatworms use as osmoregulatory organs. Open to outside, but not inside.

Question 6

Nephridia

Answer 6

Earthworms use to osmoregulate. Open inside and outside.

Question 7

Malpighian Tubules

Answer 7

Insect osmoregulatory organs.

Question 8

Vertebrate Kidneys

Answer 8

Vertebrate osmoregulatory organs.

Question 9

Kidney Basic Functions

Answer 9

Filtration, Reabsorption, and Secretion

Question 10

Proximal Convoluted Tubule

Answer 10

Reabsorbs virtually all nutrient molecules in the filtrate and 2/3rds of the NaCl and water.

Question 11

Loop of Henle

Answer 11

Creates gradient of increasing osmolarity from cortex to medulla. Transport Na and Cl into ascending loop. Two limbs of the loop form a countercurrent multiplier system.