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The plasma membrane is the limiting membrane of a cell. It is called Phospholipid Bilayer because it consists of proteins and lipids.
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Does water surround cells?
No, they are surrounded by cell membrane aka plasma membrane. This is for ALL cells.
What controls the movement in and out of the cell in plant cells?
cell membrane aka plasma membrane
What contains cell materials?
The plasma membrane-- AKA the cell membrane-- surrounds the cell and keeps the cytoplasm and organelles in the cell.
What are the 3 types of cellular transport that the plasma membrane controls?
There are many different processes that are controlled by the plasma membrane aka as the cell membrane.Selective Permeable -- this means that only certain things will be allowed to enter or to leave the cell membrane.Active transport -- this process is where ATP is required. An example of this type of transport is when there is particles that are too large to passively go through the membrane will need to be carried by glucose, and through protein carriers.Passive transport -- this is where no actual ATP is required, it flows quite freely through the membrane. One example of this type is diffusion.
What prevents polyspermy from occurring?
polyspermy is a egg that was fertilized by multiple sperm. This is a major problem in most cells because due to this, there will be no sign of diploidy (2 set of chromosomes). The egg prevents this during the acrosomal process. The contact between the acrosome and the vitelline envelope triggers the egg to release Ca+ which changes the charge under the plasma membrane. This prevents other sperms from interacting. This is the first way that it is prevented. This way is often referred as the "Rapid Block" For the "Slow Block", The cortical granules inside the egg (they're like these tiny vesicles just under the plasma membrane) fuse with the egg plasma membrane. this in turn triggers swelling of the space betweel the vitelline envelope and the plasma membrane. Afterwards, the vitelline envelope hardens.
Phosopholipids and proteins are used to make the cells what?
The phospholipid bilayer, aka, the cell membrane.
What regulates what leaves a cell?
plasma membrane aka cell membrane
What regulates a passage of materials between the cell and its environment?
cell membrane aka plasma membrane
Does water surround cells?
No, they are surrounded by cell membrane aka plasma membrane. This is for ALL cells.
What controls the movement in and out of the cell in plant cells?
cell membrane aka plasma membrane
What contains cell materials?
The plasma membrane-- AKA the cell membrane-- surrounds the cell and keeps the cytoplasm and organelles in the cell.
What regulates which substances enter and leave a cell?
The plasma membrane. Carrier proteins and ion channels are parts of the plasma membrane, and aid in diffusion across concentration gradients, as most things don't freely move from one end of the cell membrane to the other. The Sodium-Potassium pump is a major ion channel in the plasma membrane, and regulates the intake of potassium and export of sodium (3 molecules sodium out, 2 molecules potassium in.)
What is the difference between endomysium and sarcolemma?
Sarcolemma is the equivalent of the plasma membrane of the muscle fiber (aka muscle cell). The endomysium is a connective tissue that bounds around the sarcolemma.
What are the 3 types of cellular transport that the plasma membrane controls?
There are many different processes that are controlled by the plasma membrane aka as the cell membrane.Selective Permeable -- this means that only certain things will be allowed to enter or to leave the cell membrane.Active transport -- this process is where ATP is required. An example of this type of transport is when there is particles that are too large to passively go through the membrane will need to be carried by glucose, and through protein carriers.Passive transport -- this is where no actual ATP is required, it flows quite freely through the membrane. One example of this type is diffusion.
Is facilitated diffusion?
Facilitated Diffusion is the movement of molecules across cell membranes through protein channels and carrier proteins.Facilitated diffusion is a passive transport process, aka no energy required, where substances move down their concentration gradient (high concentration to low concentration) across a protein through a membrane protein because it is unable to diffuse directly through the phospholipid portion of the membrane itself.Diffusion of molecules assisted by protein channels that pierce a cell membrane
What prevents polyspermy from occurring?
polyspermy is a egg that was fertilized by multiple sperm. This is a major problem in most cells because due to this, there will be no sign of diploidy (2 set of chromosomes). The egg prevents this during the acrosomal process. The contact between the acrosome and the vitelline envelope triggers the egg to release Ca+ which changes the charge under the plasma membrane. This prevents other sperms from interacting. This is the first way that it is prevented. This way is often referred as the "Rapid Block" For the "Slow Block", The cortical granules inside the egg (they're like these tiny vesicles just under the plasma membrane) fuse with the egg plasma membrane. this in turn triggers swelling of the space betweel the vitelline envelope and the plasma membrane. Afterwards, the vitelline envelope hardens.
When the cloud of plasma reaches the earth what is formed?
Aurora borealis (aka "Northern Lights")
