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AMBER KING FINAL LABS BIOS251 ONLINE LABS WEEK 3 MEMBRANE TRANSPORT LAB 2024|2025
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AMBER KING FINAL LABS BIOS251 ONLINE LABS WEEK 3 MEMBRANE TRANSPORT LAB 2024|2025
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AMBER KING FINAL LABS BIOS251 ONLINELABS WEEK 3 MEMBRANE TRANSPORT LAB
2024|2025
Anatomy & Physiology 1
AMBER KING
OL Lab 3: Cell Membrane and Transport: Learn how transporters keep cells
healthy
Learning Objectives:
Describe the plasma membrane structure using the fluid mosaic model
Recognize the relative permeability of lipid bilayers to different classes of
molecule
Compare active and passive transport of molecules
Identify the 3 modes of active transport and the different classes of ion channel
and carrier molecules
Relate the expression of specific transport proteins to the cell’s role
Introduction:
A variety of substances move in and out of the cells through the plasma membrane.
Membrane transport is vital for cellular activities. The cells need to be healthy for the
body to work efficiently. From filtration in the kidneys to the contraction of muscles
during exercise, membrane transport contributes to many processes. In this simulation,
you will learn about the structure and function of the cell membrane, and discover why
membrane transporters are vital for healthy cells and the function of organ systems.
In the first part of your mission, you will be introduced to the concepts of selective
permeability and the fluid mosaic models of the plasma membrane. You will explore why
cells need specialized transporter proteins to transport cargo molecules across their
membranes. While some molecules can diffuse across the cell membrane, most
molecules require a transporter protein to enter or leave the cell.
In the later part of the simulation, you will set up a fluorescence microscopy experiment
to learn how the channels, carriers, and pumps that exist in the membrane ensures that
only the right molecules enter under the right conditions and help not only to keep the
cell healthy but also help organ systems to function.
Part 1: Complete Labster Cell Membrane and Transport
, Part 2: Report and Reflection
Purpose: Describe in your own words and in complete sentences, the purpose of this
experiment.
The purpose of this experiment was to look at the transfer of molecules into and
out of cells via membrane transport. Through the two different simulations, we
were able to see the affects that transport molecules have on whether molecules
can enter a cell or not.
Observations: List 2 observations you have made in this simulation.
One observation that I made in this experiment is that small hydrophobic molecules are
the only molecules that can enter a cell with a transport molecule. The other observation
that I made through the simulation was that aquaporins are the transport molecules that
allow water to enter our cells. Through membrane transport, the aquaporins open up
and allow water to break through the cell membrane which results in it gaining access to
the inside of the cell.
Answer all the questions below:
1. In complete sentences and in your own words define the following cellular
transport: (2 points)
a. Diffusion: The movement of molecules into and out of the cell without using
transport protein channels.
b. Osmosis: diffusion of water across the cell membrane wall.
c. Facilitated diffusion: The movement of molecules through transport protein
channels known as membrane proteins that allow substances into the cell
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