Anna and Shula

Alaskan Fish Dichotomous Key

www.alaskaflyfish.net/alaskafish.htm

1 A .............. Have Spots .........Go to 2
1 B .............. Doesn't have spots...... go to 9

2 A .............. Has large dorsal fin.. Arctic Grayling
2 B .............. Doesn't have a very large dorsal fin ..... Go to 3

3 A ..............teeth emerge from a black gum-line ....... Chinook
3 B .............. Doesn't have black gum line ...... Go to 4

4 A .............. Dark spots ... Go to 5
4 B .............. Light Spots....Go to 8

5 A .............. Has red line across the side.... Rainbow Trout
5 B .............. Doesn't have stripe .... go to 6

6 A .............. Has Spots below lateral line...Steel Head
6 B .............. Doesn't have spots below lateral line .... go to 7

7 A .............. Has pinkish tint ....... Pink Salmon
7 B.......... Not pinkish tint..... Silver Salmon

8A ............. Longer and Skinny...... Northern Pike
8B.............. pale yellow spots on the back......... Dolly

9A ........... V shaped tail.......Chum
9B............ Not V shaped tail ...... go to 10

10A..........Very wide and flat.......Halibut
10B...........No spots......Sockeye


Cell Membrane Transport Lab

Focus Question: - How can passive transport be demonstrated using a gelatin "cell" model?
Materials: Gelating cell, beakers, 30 ml of ammonia, filter paper, rubber band, paper towel, timer, goggles, ruler
Procedure -
Results -

2 min: had a tint of pink.
4 min: darker pink, spread across the surface on the bottom.
6 min: Hot pink, seemed to be spreading all over and it seemed to be shrinking a little.
8 min: color started traveling up from the bottom, started breaking.
10 min: only 3 milliliters on the bottom were pink, and it was very fragile.
We realized that in the matter of ten minutes only the bottom layer of the jello turned hot pink, and it got a lot more fragile, wet, and broke a lot easier.

1. Which cell transport process caused the gelatin "cell" to undergo changes without coming in direct contact with the ammonia? Diffusion is the kind of cell transport it used because only the fumes traveled, which are gasses, and they can move freely.
3. Is ammonia an acid, a base or neutral? Ammonia is a base because the gelatin cell turned pink when the fumes hit it.Rbc
4. Insert the 3 Red Blood Cell pictures (RBC1, 2 & 3). Under each picture label the solution that the cell is sitting in as hypertonic, hypotonic or isotonic. ALSO, state whether the water moved into the cell, out of the cell or back & forth.

RBC1.png
Hypertonic
(water leaves cell)

RBC2.png
hypotonic (water enters cell)

RBC3.png
Isotonic (no movement)


Reflection -

In this lab we demonstrated how passive transports using a gelatin. We used a filter to blocked the gelatin from contacting with the ammonia. We waited for ten minutes while the gelatin absorbed the fumes from the ammonia, which caused the gelatin to change hot pink. We learned that fumes can enter a cell and manipulate it. We also learned that fumes can travel up and change the cell of a gelatin, and it can be absorbed. Compared with the gummy bear experiment, instead of using water, we used ammonia. The gelatin wasn't in contact with the ammonia, but was place right above it. The gummy bear was placed on the water, and was left to absorb the water.