Class notes

Animal Body Science - Lectures on Osmoregulation

1 view 0 purchase

Course
Biology 224 (ABS224)

Institution
University Of Saskatchewan (USask )

This document includes the lectures on Osmoregulation. This was a very helpful lecture for the lab and lab final.

[Show more]

Preview 2 out of 6 pages

View example

Uploaded on April 12, 2023
Number of pages 6
Written in 2022/2023
Type Class notes
Professor(s) Dr. chedrese
Contains Osmoregulation lecture

CA$15.55

Add to cart

Add to wishlist

100% satisfaction guarantee
Immediately available after payment
Both online and in PDF
No strings attached

Bio 224 – animal body systems – osmoregulation
Two concepts to remember.
Osmosis: the movement of solvent particles across a semipermeable membrane from a dilute solution into a
concentrated solution
• The solvent moves to dilute the concentrated solution and equalize the concentration on both sides of
the membrane.
Diffusion: the movement of particles from an area of higher concentration to lower concentration
• The overall effect is to equalize concentration throughout the medium
Osmosis
the unit of osmotic concentration is the osmole (Osm)
• Number of Osm of solute per liter (L) of solution.
o Also termed Osm/L or “osmolar”
• A milliosmole (mOsm) = 1/1,000 0f an osmole
• A microosmole (uOsm) = 1/1,000,000 of an
osmole
Single Na+
A single Na+ contributes as mich to the osmolarity as a
large molecule.
• One mole of glucose, which does not ionize,
• One mole of NaCl
The osmol represents the pressure equivalent to the
amount of solute that dissociates in solution.
• Osmosis can be made to do work:
o Osmotic water movement generates a hydrostatic pressure.
o Osmotic pressure (pie)
• Mechanical pressure required to prevent movement of water across a
semipermeable membrane.
o 1.0 Osm solutions has a Pi of 22.4 atm at 0’C

, Tonicity

There are three classifications of tonicity relative to another.

Animals and their relationship with water
• Terrestrial:
o Unrestricted access
o Limited access
• Aquatic:
o Sea water
§ 1,000 mOsm
o Fresh water
§ <5 mOsm
Water and solutes in the Internal Media
• Water
o The universal solvent.
o 70% of the weight of an animal body
• Ions
o Na+, K+, Ca++, Cl-, Mg++, PO4-
• Organic molecules.
o Carbohydrates
o Proteins
o Lipids

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller ellabogan. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for CA$15.55. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

56326 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling