ThursdayApril 7, 2011

(TAKS Rotation Day 4 - Biology)

Bell RingerThursday, 4-7-11

No Bell Ringers This Week

AnnouncementsPlease come in and take any missing tests, remediate

summative grades if needed, and turn in all missing assignments!

Six-Week’s Assignment List Date Issued Date Due

WS - The Kinetic Molecular Theory and Nature of Gases 2/24 3/3

Quiz – Pressure Unit Conversions 3/3 3/3WS – The Gas Laws 3/3 3/10

WS – Dalton’s Law of Partial Pressures 3/7 3/14

TEKSCheck #4 3/8 3/8

WS – Practice Working with Gases 3/9 3/23

TEST 8 3/11 3/11WS - Solubility 3/21 3/28

WS – Types of Mixtures 3/23 3/30

WS – Solute – Solvent Interactions 3/28 4/4

WS – Review of Important TAKS Concepts Part 1 3/29 4/1

Review for Test 9 3/31 4/1Test 9 4/1 4/1

TAKS Rotation Day 4

Biology LabsCellular Energy Conversions(9B)

Cellular Transport (4B)

Focus Question – 9BAnimals release carbon dioxide

(CO2) in the process of respiration.

Focus Question – 4BA freshwater fish is adapted to a low salinity environment, and thus would

dehydrate if placed in saltwater. Water would flow from a region of greater concentration (inside the fish’s body) to a region of lesser

concentration (the saltwater environment.)

Lab 4B – Cellular Transport

A hypertonic solution is one that has a greater salt concentration (and therefore a lesser water concentration) than the normal cells of the

body. Cells in a hypertonic solution will shrivel.A hypotonic solution is one that has a lesser salt concentration (and

therefore a greater water concentration) than the normal cells of the body. Cells in a hypotonic solution will swell.

An isotonic solution is one that has the same salt concentration (and therefore the same water concentration) as the normal cells of the

body. Cells in an isotonic solution will stay the same.Osmosis is the diffusion of water across a cellular membrane.

Question 3

Regulating osmotic pressure is vital, because too much water can cause a cell to burst and too little water can cause a cell to shrivel. Either scenario can lead to cell death and possible tissue damage, or even

organ failure.

Question 4