Eukaryotic Organelles | Membrane Transport | It's all about the Cell Cycle, Nucleus and DNA... | ...or is it? | Theories of Aging |
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What is the mitochondrion (mitochondria)?
This organelle is responsible for converting sugar into ATP, which provides the cell with usable energy. It is the "power house" of the cell.
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What is active transport?
EC: What type of transport doesn't require energy?
This form of transport requires the use of ATP (energy), because it is moving molecules against the concentration gradient (up the hill).
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What is the nucleus?
This is like the brain of the cell in that it controls the activities of the cell, like mitosis.
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What is epigenetics?
This is considered the software of the genome, or what controls which genes will be turned on/off (gene expression).
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What is Wear and Tear theory?
This theory of aging states that the body is like a car engine in that the better you take care of it the longer it will last, but no matter what you do it will take on damage and eventually break down.
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What is the Golgi apparatus (body/complex)?
This organelle packages proteins from the ER, usually making them more complex. It is like the UPS of the cell because it can send materials out of the cell.
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What is diffusion?
EC: what is the diffusion of water?
Molecules capable of this type of passive transport do not require carrier proteins to help them pass through the membrane.
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What are proteins?
EC: What molecule acts as a middle man, carrying the message between DNA and protein?
Genes are segments of DNA that code for this kind of molecule.
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What is "turned off"?
EC: How does this relate to cell differentiation?
If a gene is inaccessible, it is said to be this.
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What is Disengagement "theory"?
This theory of aging states that people age more quickly when they become separated from society, either voluntarily of forcefully.
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What is the lysosome?
This organelle is just a membrane surrounding digestive enzymes. Its function is to break down cell parts for removal.
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What is hypotonic?
EC: Where will water go? |
What is the M phase?
EC: What is checked during this phase's checkpoint?
This phase of the cell cycle is where the cell divides into to two daughter cells.
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What are histones?
These are proteins that DNA wraps around to stay organized. They also are critical for regulating gene expression by either bunching up (turned off) or spreading out (turned on).
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What is Activity "theory"?
This theory of aging states that people age more quickly when they stop doing activities, especially those they have loved doing their entire life.
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What is the rough ER?
This organelle is a concentrated site for protein production and transport within the cell. It is closely associated with the nucleus, and is covered with ribosomes.
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What is pinocytosis?
When cells need to take in large quantities of liquid in a short amount of time, they will use this rather than rely on passive transport. Essentially, they will break part of their membrane off into a vesicle to "swallow" the liquid.
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What is grow?
During the G1 and G2 phases of the cell cycle the cell does its normal activities (make proteins, etc.) and this, which is essential for the cell to divide.
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What is stretch out the GR gene, causing more GR protein to be made?
EC: What will the effect of this be on the rat's future?
Thinking back to the Lick Your Rats activity, this was the effect of a high nurturing environment on the brain of baby rat.
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What is Free Radical Theory?
EC: What molecules are used to combat the damage from free radicals?
This theory of aging states that aging is accelerated when electrons are removed from body tissues and cells by molecules that need them to pair their electrons. This can lead to cancer, Alzheimer disease, and a number of other illnesses.
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What is the nucleolus?
This organelle is where the sub-units for ribosomes are made. It is essentially a bunch of ribosomal RNA (rRNA) organized into a ball in the nucleus.
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What is [dynamic] equilibrium?
EC: Why is it called "dynamic"?
When two differently concentrated solutions are separated by a semi-permeable membrane, there will be a net gain or loss of molecules for the two sides until what is reached?
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What is damage to DNA and proper cell size?
While DNA is duplicated in the S phase of the cell cycle, the cell doesn't check if it did this correctly until the G2 phase. The cell also checks for these two things during the G2 checkpoint.
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What are methyl tags?
EC: What do acetyl tags bind to, and what does this usually do?
These tags bind to DNA, causing it to become "sticky" and having histones bunch up, which usually turns off the gene.
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What is Telomere theory?
EC: What is the enzyme that can replace telomerase?
This theory of aging states that no matter what you do there is a biological clock on your lifetime, which is limited by the number of divisions a cell can go through before DNA starts to be cut off.
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What is they will dehydrate you because they are highly hypertonic?
It is because of this that drinking saltwater, as well as sugary drinks, is bad for your body.
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