DA 116 Lecture 1: Dance Pedagogy - Observation Assignment Examples

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laurenk

4 Nov 2021

School

Wagner College

Department

Theatre And Speech

Course

DA 116

Professor

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Document Summary

Observation assignment: this afternoon, someone drove in into our mailbox, knocking it over and into the road. I didn"t hear the crash myself but i did see my mom run down the hall to get outside. I was in my room so i saw her run by the door for a second. From what i saw, it looked like running in a cross-lateral pattern of the arms and legs and had intensified her breath support. She was in the vision drive: quick time, bound flow, and direct space. Her arms/legs were moving through the sagittal dimension (forward/back) through central pathways, and she was definitely in the directional mode of shape change: at the dinner table tonight, i observed the way my dad eats. He"s a very careful, slow eater, and takes a lot of time with his food. He was working in an upper- lower developmental pattern, with only his upper body moving.

Related Questions

It's a pretty elementary concept, and when I first learned of itI don't think I had the foundations to even think of such aquestion, but I found myself the other day thinking about theamphipathic nature of the phospholipids in the plasma membrane andwhy it might be that lipid-soluble molecules don't stay in betweenthe layers (of the bilayer).

I know that simple diffusion is a response to a concentrationgradient, but consider a case where equilibrium is being restoredand lipid-soluble molecules are diffusing from whateverextracellular matrix through the membrane and into the cytosol.Towards the end of this process, when equilibrium is nearlyrestored and the last few molecules are making their way into thecell, the rate of diffusion for these last couple molecules will beslower than those that diffused when the concentration differencewas greater. Since the polar heads on the outside and inside of thebilayer are hydrophilic but the inner part, where the fatty acidtails are, is hydrophobic, what drives a molecule to leave thecozy, accepting, lipophilic environment of the middle (of thebilayer) to cross through the cytosolic-side rejecting polar headsand enter the cytosol?

I understand that initially these molecules were moving into thecell in response to a difference in intracellular vs extracellularconcentration, but I'm asking whether we would ever see a casewhere the gradient is nearly zero and a molecule in transit simplydecides to reside in between the layers instead of crossing all theway into the cell; as if moving through the cytosolic polar headside is not worth the effort to reduce a nearly-zero gradient tozero.

Please ask me if I can clarify my question in any way -- I'mfinding it difficult to phrase. I asked my professor (who has herdoctorate in toxicology & pharmacology) and she understood whatI was asking but didn't have an answer.

Osmosis Lab - Rubber Egg
Objectives:
To demonstrate the semi-permeability of a cell membrane To lay ground-work for discussion of osteoporosis
Materials Needed:
1 raw egg in its shell
clear vinegar
3 wide-mouth jars or plastic cups
corn syrup
water
Procedure:
Measure and record the circumference around the center of the egg.
Record the appearance of the egg.
lace the egg inside the jar. DO NOT crack the shell.
Cover the egg with vinegar.
Observe immediately, and then periodically for the next 72 hours.
Remove the egg after 72 hours and measure its circumference.
Compare the appearance of the egg before and after being in the vinegar.
Put corn syrup in a clean jar and then place the egg in the jar and let it sit over night.
Compare the appearance of the egg before and after the syrup.
Put fresh water (tap or distilled works) in a clean jar and place the egg in the jar and let it sit over night.
Compare the appearance of the egg before and after the syrup.
Strategy:
The egg has a hard shell on the outside and the circumference will vary. Bubbles start forming on the surface of the egg's shell immediately and increase in number with time. After 72 hours, the shell will be gone and portions of it may be seen floating on the surface of the vinegar. The egg remains intact because of the thin see-through membrane. The size of the egg has increased.
The shell of the egg is made of calcium carbonate, commonly called limestone. When vinegar chemically reacts with the limestone, one of the products is carbon dioxide gas, those bubbles seen on the egg. The membrane around the egg does not dissolve in vinegar, but becomes more rubbery. The increased size is due to osmosis, the movement of water through a cell membrane. The water in the vinegar moves through the thin membrane into the egg because the water inside the egg has more materials dissolved in it than does the vinegar. Water will always move through a membrane in the direction where there are more dissolved materials. The contents of the egg stayed inside the membrane because the molecules were too large to pass through the tiny homes. This selectiveness of materials moving through the membrane is called semi-permeability.
Journal Question:
1. Explain your observations in detail in terms of concentration gradient, diffusion, osmosis, osmotic pressure, passive transport, and active transport.