pre lab 3 - shrink? a. The salt concentration outside the...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Pre-Lab worksheet #3 Lab 3: Biological Membranes     Name: Valerie Henderson Please write a response in no more than 4 grammatically correct sentences. This sheet is due  at the start of your lab. 1. (1 point) How long are the beet pieces soaked for this experiment The beet pieces are soaked for fifteen minutes. 2.  ( 1 point) What is osmosis? Osmosis is movement of water across a semi-permeable membrane from a region of  low solute concentration to an area of higher solute concentration. 3. ( 2 points) Below are two situations in which the salt balance differs between the outside  and inside of the cell. In each case please explain 1) does water enter or leave the cell;  and 2) depending on the flow of water across the cell membrane, will the cell expand or 
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: shrink? a. The salt concentration outside the cell is 2.5 %; whereas inside the cell salt concentration is 0.9%. Water leaves the cell by osmosis to go to the area of higher solute concentration. The cell will shrink because it is losing water. b. The salt concentration outside the cell is 0.6 %; whereas inside the cell the salt concentration is 0.9%. Water will enter the cell by osmosis because the area inside the cell has a higher solute concentration. The cell will expand because it is taking on more water. 4. (1 point) What type of control is used in these experiments. The control in these experiements is the zero percent salt solution because we know it will not damage the membrane....
View Full Document

This note was uploaded on 04/13/2008 for the course BIOL 171L taught by Professor Riley during the Fall '07 term at Hawaii.

Ask a homework question - tutors are online