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What is hydrophobic substances?
fats, oils, lipids are all hydrophobic.
What would happen if a cell membrane were completely made of polar substances?
The cell would be unable to maintain a stable internal environment.
Why albumin cannot cross the blood brain barrier?
Albumin is a large protein molecule that does not readily pass through the tight junctions of the blood-brain barrier (BBB), which selectively regulate the passage of substances between the bloodstream and the brain. Due to its size and structure, albumin is unable to diffuse through the BBB, resulting in limited entry into the brain.
Why is plasma membrane called selectively permeable?
Selective (or differential) permeability allows the cell to regulate its internal environment and maintain internal homeostasis. This is also the basis by which a neuron (nerve cell) can 'fire' and send a message along its axon - it selectively allows one electrolyte then a different electrolyte to flow across its cell membrane and change the electrochemical gradient.
What affect does urbanization has on temperature?
The primary affect urbanization has on temperature is to increase it overall. Because of the concentration of people, buildings, and equipment, nature is unable to dissipate all the heat as it normally would.
Why is food normally unable to flow back up through the esophagus from the stomach?
Because of the esophageal sphincter (or cardia)
Substances unable to dissolve in water?
Substances that are unable to dissolve in water are considered hydrophobic. This includes substances such as oil, fats, and waxes. These substances are non-polar and do not interact well with the polar water molecules, leading to limited or no solubility.
Why is glucose present in the glomerular filtrate but absent in the urine?
Glucose is absorbed in the nephron of the kidney, if it is present in very high amounts or unable to be reabsorbed, like with diabetes, it will be present in urine.
If a drug user becomes unable to function normally with out the drug it is called?
It is called "Addiction"
Which molecule would be unable to diffuse through a cell membrane?
A molecule that is too large or charged would be unable to diffuse through a cell membrane.
What affects individuals unable to combat infection that would present no problem for normally healthy people?
Immunodeficiency
What was Mephibosheth disability?
Mephibosheth was disabled in both feet, making him unable to walk normally.
Why was Thurber unable to pass botany?
He was unable to see through a microscope. (Discussed in "My Life and Hard Times")
What is hydrophobic substances?
fats, oils, lipids are all hydrophobic.
What is the the solid particles collected in a filter paper?
The solid particles collected in a filter paper are known as the residue. These are the substances that were unable to pass through the filter paper and were left behind during the filtration process. They can be further analyzed or disposed of depending on the experiment.
What makes these materials be insulators?
Electricity is unable to pass through them
You are unable to download the torrent through bit torrent software?
No
