Transcript Transport Quest Review

Transport Quest
Review
Plasma Membrane
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Draw the structure of the
plasma membrane
including as many
components as possible.
What properties of
phospholipids provide the
special properties of the
plasma membrane?
Plasma Membrane
Do these get through the plasma
membrane? (what categories of substances
can get through?)
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H+ or Ca++
CO2
K+, ClH2O
Glycerol or ethanol (-OH)
O2
Amino acids
Glucose
Do these get through the plasma
membrane? Lipophilic, non-polar, small
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H+ or Ca++
CO2
K+, ClH2O
Glycerol or ethanol (-OH)
O2
Amino acids
Glucose
No
Yes
No
Yes
Yes
Yes
No
No
What is this an example of?
Explain?
What is this an example of?
Explain?
Diffusion – Higher Concentration to Lower conc until reach equilibrum
Passive Transport  [High] to [Low]
Passive Transport  [High] to [Low]
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DIFFUSION
• FACILITATED
DIFFUSION
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OSMOSIS
Describe what is happening in this
beaker? Be complete in your
description.
Describe what is happening in this
beaker?
Osmosis – movement of water in response to concentration
difference across selectively permeable membrane.
Answer the following listing the type of
environment, movement of water, solute
concentration, and condition of cell:
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What happens to an animal cell placed in salt
solution?
What happens to a plant cell placed in water?
What happens to an animal cell placed in 0.9%
salene?
What happens to you if you are stranded and
drink salt water in the ocean?
Osmotic Pressure
Answer the following listing the type of
environment, movement of water, solute
concentration, and condition of cell:
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What happens to an animal cell placed in salt
solution?
 Hypertonic
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What happens to a plant cell placed in water?
 Hypotonic
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solution- cell will swell
What happens to an animal cell placed in 0.9%
salene?
 Isotonic
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solution- cell will shrivel
Solution – nothing will happen
What happens to you if you are stranded and drink
salt water in the ocean?
 Salt
water will create a hypertonic environment
resulting in the loss of water from your body.
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A homeowner contracts a lawn company to
make the grass grow better. This process is
normally done by spraying a mixture of fertilizer
and water onto the lawn.
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What would happen if too much fertilizer and too
little water were sprayed onto the lawn?
What happens to the cells of the grass?
Was the fertilizer/water mix hypertonic or
hypotonic to the cells of the grass?
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A homeowner contracts a lawn company to
make the grass grow better. This process is
normally done by spraying a mixture of fertilizer
and water onto the lawn.
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What would happen if too much fertilizer and too
little water were sprayed onto the lawn? Lawn
would dry out and die.
What happens to the cells of the grass? Cells
loose water and shrink.
Was the fertilizer/water mix hypertonic or
hypotonic to the cells of the grass? Hypertonic
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What are some examples of active
transport?
 Describe the concentration gradient
involved in active transport
 How is active transport different from
passive transport?
 What’s happening in this picture?
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What are some examples of active transport?
Nervous system/ Na/K pump
Describe the concentration gradient involved in
active transport. Low to high against conc
gradient
How is active transport different from passive
transport? Requires energy
What’s happening in this picture?
Endocytosis(top), Exocytosis bottom
Label the Structure of a Neuron
Structure of a Neuron
4. Myelin sheath:
insulating membrane
*increases speed of
impulse*
1. Cell body:
Contains the nucleus
and other cell
organelles
Nucleus
Axon terminals
1. Cell body
4. Myelin sheath
Nodes
3. Axon
3. Axon: long, thin extension of the cell
body
*Function: sends nerve impulses away
from the cell body*
(Remember “A” for away!)
2. Dendrites
2. Dendrites:
Short, branched
extensions of the cell body
*Function: receive stimuli*
Nervous System
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Describe what types of nerves are involved
(sensory and motor) and how they work
together when you stub your toe on a desk.
Action potential
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You are a potassium ion. There is a new sodium
ion hired to work in the axon. Your job is to
describe to the sodium ion their job
responsibilities in resting potential and action
potential.
 Don’
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t forget to tell them about
Threshold
charge differences in the membrane
how the signal is communicated to the next neuron!