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Simple (Passive) DiffusionDescribe the direction of transport relative to theconcentration gradient:Molecules move down a concentration gradient. They movefrom region of higher concentration to one of lower concentrationbecause of random thermal agitation.Describe where the energy for transport comes from:No metabolic energy input is required.Describe IF and HOW membrane proteins participate:No membrane proteins are used for this transport.Discuss whether or not this type of transport offers the cellspecificity. i.e., can the cell regulate what goes in andout?:Does not regulate the cell specificity.Facilitate DiffusionDescribe the direction of transport relative to theconcentration gradient:Molecules move down a concentration gradient. They movefrom region of higher concentration to one of lowerconcentration.Describe where the energy for transport comes from:No metabolic energy input is required.Describe IF and HOW membrane proteins participate:Uses carrier molecules (permeases) by attachment.Discuss whether or not this type of transport offers the cellspecificity. i.e., can the cell regulate what goes in andout?:The membrane carrier can change conformation after binding onexternal molecule and subsequently release the molecule on the cellinterior.Primary Active TransportDescribe the direction of transport relative to theconcentration gradient:Movement of ions or molecules across a cellular membrane from alower to a higher concentration.Describe where the energy for transport comes from:ATP, sunlight, etc.Describe IF and HOW membrane proteins participate:Involves carrier proteins (permeases) by attachment.Discuss whether or not this type of transport offers the cellspecificity. i.e., can the cell regulate what goes in andout?:Concentrates molecules inside the cell.Secondary Active TransportDescribe the direction of transport relative to theconcentration gradient:Molecules move against the gradient. They move from low tohigh concentration.Describe where the energy for transport comes from:ATP, sunlight, etc.Describe IF and HOW membrane proteins participate:Attaches to a carrier protein.Discuss whether or not this type of transport offers the cellspecificity. i.e., can the cell regulate what goes in andout?:Concentrates molecules inside the cell.
Insects are the one group of animals that does NOT have respiratory pigment in their body fluids. How do they manage to get O2 to their tissues?
Compare the skull of each of the following vertebrates, Sarcopterygians, Labyrinthodont amphibians, Snake and Therapsida. You should include similarities and differences in the neurocranium.
A patient has esophageal cancer and should have a feeding tube inserted. The nurse tells the patient that the tube will be inserted surgically into the duodenum. The wife asks why the tube will not be inserted into the stomach directly.
What is the difference between compensation depth and critical depth? What factors influence each? Explain one theory of spring bloom initiation using these concepts.
predict the phenotypic ratio (show branch diagram to explain why you predict this ratio), show results and test with Chi square analysis.
A protein of interest has an exceptionally acidic pI of around pH 5.5 whereas the rest of the other proteins have an overall basic pI of around 7.5.
Reduced nucleotides such as NADH and NADPH are produced by all of the following metabolic pathways EXCEPT
all aspects of the kirby Bauer test are standardized to assure reliability of comparison with the published standards.
In what obvious ways are eukaryotic cells different from one another (plants vs. animals)? In what ways are they similar?
Think about a population of one hundred mice on an island, with allele frequencies B=0.2 for black coat color and b=0.8 for white coat color. Black, B,
Is ecdysone secretion from the prothoracic gland of insectscontrolled by feedback inhibition of the neural structures that secrete brain hormone?
q. bryophytes and fern allies were most prevalent during early plant evolution however many of these plants have been
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