Inserting
Today I did not listen to a single song. It was a day without music as I required all my brain to focus on accepting and storing data in cold, grimy memory instead of having joyous melodies spin through the warmer corridors and back out into atmosphere as carbon monoxide.
Anyway I'm pretty sure I'll ace my biology exam.
Comments
Re: sarcomeres
Actin - thin filaments - I band (I is a thin letter)
Myosin - thick filaments - H zone (H is a thick letter)
There is nothing about respiration in that argh!
The respiratory center is located in the pons and medulla oblongata.
Binding of oxygen to hemoglobin is cooperative -- when one binds to one of the four subunits, the other subunits change conformation to increase the affinity of oxygen binding.
The oxygen itself binds to the non-protein heme group of each hemoglobin subunit. The oxygen binds directly to the iron on the heme.
Carbon dioxide reacts with water to form carbonic acid, which dissociates to H+ and bicarbonate. This reaction is catalyzed by carbonic anhydrase and is found in red blood cells.
At the body tissues, carbon dioxide diffuses out into the blood plasma and into the red blood cells (binds to the C-terminal animo acids.. not the oxygen binding site). Most carbon dioxide is transported in the form of bicarbonate. At the lungs, this diffusion is reversed.
...
I wonder if your mum knitted you that sweater...
I knitted it myself.