a-level bio❤️🔥
what is the formula for image size?
I=AxM
image= actual x magnification
what is gram positive walls look like?
1. Have thick walls
2. Appear blue or purple when dyed
what do gram negative walls look like?
1. Have thin walls
2. Appear pink or red when dyed
why do scientists use gram staining?
1. to measure the thickness of cell walls.
what is the rough endoplasmic reticulum?
1. flattened sacs filled with ribosomes
2. proteins are made here
what is the smooth endoplasmic reticulum?
1. membrane tubes
2. lipids are made here
what are slow twitch muscle fibres?
1. they are used for continuous and extended muscle contractions over a long time
2. less calcium filled endoplasmic reticulum
3.more mitochondria- aerobic respiration.
THEY HELP MARATHON RUNNERS AND CYCLISTS TO CONTINUE FOR HOURS
what is the agonist?
the main muscle doing the work
what is the antagonist?
are muscles that do the opposite action as an agonist