Every middle school biology student is told the same lies.
Well, perhaps it’s more fair to say the same, “incredible oversimplifications of the truth”.
In biology 101, I was told that the nucleus is the “brain of the cell”, the membrane is the “wall of the cell” and the mitochondria is the “power plant of the cell”.
The power plant of the cell…
Let’s talk about the many functions of mitochondria in the body, mitochondrial dysfunction and how in vitro bioassays help ensure the safety of drugs. (more…)Continue Reading...
You’re in a bakery full of delicious treats. After a lot of soul-searching, you set your heart on a pecan danish. You reach for your wallet. But wait – how did you go from deciding how wanted your wallet to having your wallet in your hand?
Thank your motor neurons.
What are motor neurons?
Motor neurons are the nerve cells that come from the brain, go through the body and eventually reach your muscles. When you want to move, they signal the appropriate muscles to contract.
There are two types of motor neurons: the upper motor neurons (UPNs) and the lower motor neurons (LMNs). The names are helpful: the uppers are in your central nervous system (CNS; your brain and spinal cord) and the lowers are in your peripheral nervous system (PNS; the nerves that connect the CNS to the organs, tissues and limbs).
How does the brain tell the muscles to contract?
First the short story:Continue Reading...