Search found 6 matches

by micco13
Fri Mar 27, 2009 6:33 am
Forum: Physiology
Topic: Muscle Tones
Replies: 1
Views: 6809

Muscle Tones

Hi there,

What is the difference between a skeletal muscle tone and a smooth muscle tone? I was told that the skeletal muscle tone had something to do with muscle spindles and the smooth muscle tone used hormones ... Is it the mechanism to initiate muscle tone that is different? :?
by micco13
Mon Oct 06, 2008 8:53 am
Forum: Molecular Biology
Topic: Haematocrit and Packed Cell Volumes
Replies: 2
Views: 2480

Haematocrit and Packed Cell Volumes

Hi there, What is the significance of lower % PCVs or higher % PCVs in blood (mixed with saline solutions)? We did an experiment and there is a decreasing trend between PCV and NaCl ... Does the low PCV indicate that more cells has lysed (at the higher NaCl conc)? How would you tell which concentrat...
by micco13
Mon Sep 08, 2008 11:48 am
Forum: Human Biology
Topic: Organ systems
Replies: 4
Views: 20504

Re: Organ systems

Yes, it is separated by the diaphragm. But I think the question is asking what the significance of the diaphgram is in separating the two cavities.. :? I tried looking in my textbooks but couldn't find any answers :( Thanks for your help though!
by micco13
Fri Sep 05, 2008 1:11 am
Forum: Human Biology
Topic: Organ systems
Replies: 4
Views: 20504

Organ systems

Hi there, Can anyone help me with these questions on organ systems? 1. "Which of the organ systems are found in both subdivisions of the ventral body cavity?" 2. "Which organ systems are found in the thoracic cavity only?" 3. "Which are found in the abdominopelvic cavity onl...
by micco13
Sat Aug 23, 2008 7:51 am
Forum: Cell Biology
Topic: Myelin Sheath
Replies: 1
Views: 2389

Myelin Sheath

Hi there, We are currently studying about nerves/neurons. I heard that messages can travel along a neuron much quicker if we are warming up/exercising ... Does anyone know why this happens and how this is related to myelin sheaths? My only guess is that because the fatty layer of myelin becomes more...
by micco13
Mon Aug 18, 2008 5:22 am
Forum: Cell Biology
Topic: Urea and membrane permeability of RBC
Replies: 2
Views: 69300

Urea and membrane permeability of RBC

Hi there, I'm a little confused with the ability of urea diffusing across membranes of red blood cells ... I was told that urea can easily penetrate the membrane as they are not present in high concentration inside the cell. If I am mistaken, isn't urea a large polar molecule? I thought they would b...