factors affecting membrane structure

WHAT ARE MEMBRANES FORMED OF?
PHOSPHOLIPID BILAYER
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WHAT ARE THE 2 PARTS OF A PHOSPHOLIPID MOLECULE?
A PHOSPHATE HEAD AND 2 FATTY ACID TAILS.
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PHOSPHATE HEAD IS SAID TO BE HYDROPHILIC. WHAT DOES THIS MEAN?
THIS MEANS THAT IS WATER LOVING
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FATTY ACID TAILS OF A PHOSPHOLIPID MOLECULE ARE HYDROPHOBIC. TRUE OR FALSE.
TRUE
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MEMBRANES CONTROL THE PASSAGE OF DIFFERENT SUBSTANCES INTO AND OUT OF CELLS. TRUE OR FALSE
TRUE
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INCREASE IN TEMPERATURE LEADS TO LESS KINETIC ENERGY OF THE PHOSPHOLIPIDS IN A CELL MEMBRANE
FALSE
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WHAT HAPPENS TO CARRIER AND CHANNEL PROTEINS AT VERY HIGH TEMPERATURES?
THEY GET DENATURED.
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ORGANIC SOLVENTS WILL DISSOLVE MEMBRANES OF CELLS. TRUE OR FALSE.
TRUE
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WHY ARE ALCOHOLS USED IN MAKING ANTISEPTIC WIPES?
ALCOHOLS DISSOLVE THE MEMBRANES OF BACTERIA KILLING THEM.
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WHEN ENZYMES LOSE THEIR STRUCTURE, THEY ARE SAID TO BE DENATURED. WHEN MEMBRANES LOSE THEIR STRUCTURE, THEY ARE SAID TO BE ---------.
DIS-RUPTURED OR DESTROYED.
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WHEN THE MEMBRANES OF NEURONES (NERVE CELLS) ARE DISRUPTED BY ALCOHOL, THEY DO NOT TRANSMIT IMPULSES AS THEY USUALLY DO. USE THIS INFORMATION TO EXPLAIN WHY THEY POLICE DOES NOT WANT PEOPLE TO DRINK AND DRIVE.
EXPLANATION TO BE GIVEN.
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NAME TWO FACTORS THAT AFFECT THE STRUCTURE OF MEMBRANES.
TEMPERATURE AND SOLVENTS.
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WE KNOW THAT HIGH LEVEL OF CHOLESTEROL IS NOT GOOD FOR THE BODY BUT CHOLESTEROL DOES AN IMPORTANT JOB IN MEMBRANES. WHAT IS THIS JOB?
CHOLESTEROL MOLECULES PREVENT MEMBRANES FROM BECOMING TOO SOLID BY STOPPING THE PHOSPHOLIPID MOLECULES FROM GROUPING TOO CLOSELY.
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LOSS OF STRUCTURE OF MEMBRANES INCREASES THE PERMEABILITY OF THE MEMBRANE MAKING IT EASIER FOR PARTICLES TO CROSS IT. TRUE OR FALSE.
TRUE.
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Other cards in this set

Card 2

Front

WHAT ARE THE 2 PARTS OF A PHOSPHOLIPID MOLECULE?

Back

A PHOSPHATE HEAD AND 2 FATTY ACID TAILS.

Card 3

Front

PHOSPHATE HEAD IS SAID TO BE HYDROPHILIC. WHAT DOES THIS MEAN?

Back

Preview of the front of card 3

Card 4

Front

FATTY ACID TAILS OF A PHOSPHOLIPID MOLECULE ARE HYDROPHOBIC. TRUE OR FALSE.

Back

Preview of the front of card 4

Card 5

Front

MEMBRANES CONTROL THE PASSAGE OF DIFFERENT SUBSTANCES INTO AND OUT OF CELLS. TRUE OR FALSE

Back

Preview of the front of card 5
View more cards

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