Physiolog

nrsyann · Jan 23, 2009

Himalayangirl-

I am using the same textbook! We are using a lab manual that one of our professors wrote though. We have gone over Chapters 1, 2, 3, and 4 to this point. Most of it is chem review but it's amazing how much of that chem I forgot! Or blocked...I don't like chem.

Does anyone have any ideas on how we would like to "study" together? Should we just toss out questions to each other as they come up?

Deb

Kimberly86 · Jan 23, 2009

i think that would be the best way for us to study deb and also if we talk about a certain subject that we are having trouble on then it could also help us to remember it, so its open to any other idea if you guys have one if not we should begin.:wink2:

Kimberly86 · Jan 24, 2009

so i have a question. In a hypertonic solution red blood cells are said to crenate. why does crenation occur?

stinebean · Jan 26, 2009

I'm so glad that I found this group as I'm also in a separate Physio class this semester. We're using Silverthorn 4th ed and our lab manual was created by another teacher in the department. Good luck to everyone!

Oh and Crenation occurs because in a hypertonic solution there is more solute dissolved in the fluid outside the cell than inside the cell so water moves out of the cell in order to reach a balance.

Here's an interesting site here that just happened to be at the top of the list when I googled hypertonic solution, but it has an animation that kinda shows what happens: http://www.tvdsb.on.ca/WESTMIN/science/sbi3a1/cells/Osmosis.htm

I hope that helps!

-stine

Kimberly86 · Jan 26, 2009

well if anybody else has anymore study questions feel free to ask and stine what are you guys learning in you class this week and everybody else in the study group. we are on DNA, RNA, and protein synthesis.

stinebean · Jan 26, 2009

... stine what are you guys learning in you class this week and everybody else in the study group. we are on DNA, RNA, and protein synthesis.

This week we're covering DNA replication and protein synthesis so it looks like we're on a similar schedule.

Kimberly86 · Jan 27, 2009

thats great stinebean we can ask each other study questions to get us ready for tests:typing

Semt3x · Jan 28, 2009

Can someone help me answer this question?

What is the difference between a graph that shows the effect of breathing rate on blood oxygen levels and a graph that shows the effect of blood oxygen levels on breathing rate? Explain what the independent and dependent variables are for each graph.

I'm not sure what I have is right so I want to see what you guys think.

stinebean · Jan 28, 2009

Here's my take on it. Does this sound right to everybody else?

Graph: Effect of breathing rate on blood O2 levels

independent variable: breathing rate

dependent variable: blood O2 levels

Graph: Effect of blood O2 levels on breathing rate

independent variable: blood O2 levels

dependent variable: breathing rate

The thing that varies independently is the thing that then affects the value of the dependent variable.

Semt3x · Jan 28, 2009

Yea that is basically what I got too. Thanks!

bluemalibu · Jan 28, 2009

Well done, Ste`be.

If it might help some, you can think of each in terms of Negative Feedback.

As one moves away from the Set Point, it triggers an Effector action (rate or concentration change) from the other.

~Blue

nrsyann · Jan 29, 2009

This wasn't my question but I just wanted to say "thanks" for these answers! It definitely helps to think of it in the negative feedback way.

What a smart group! :yeah:

Debi