Notes

On the big A3 sketchbook is a concept map of movement across the cell membrane of the ECF (extracellular fluid) and ICF (intracellular fluid). Basically explaining why you shouldn't pump water into your blood stream, and why eating too much salt causes high blood pressure.

A classic moment when the definition of isotonic/hypotonic/hypertonic you were taught at school is pretty much lies. We're told its the difference in solute concentration between two solutions, but it is infact the difference in non-penetrating solute concentration - doesn't sound a lot different but it is! As Na, Cl and other ions cannot pass through the cell membrane, when the concentration of these ions change in the ECF water moves in or out of the plasma (the blood) to compensate for the change in ion concentration (osmosis, movement of water down the concentration gradient). For example, if the Na concentration in the ECF drops, then water will move into the ICF from the ECF. This causes red blood cells to swell and burst due to the increase in water in the blood.

Hope that kind of made some sense, infact I hope that was correct... I didn't use any notes. Nice bit of revision I suppose!

then in the big A4 notebook is my notes from yesterday's muscle lecture, you can see on the bottom left handside a diagram showing the myosin cross-bridge which causes contraction in your muscles when ADP is detached, the muscle contracts. But obviously it happens several 1000 times for each body movement, and very very quickly. This also explains why when humans die they become rigid, because obviously when you die there isn't a lot of ADP about so the cross bridge remains flipped, this is called rigor mortis. Think that's correct... ish!

Then the small notecard book is filled with my learning outcomes, 3rd step in my attempt to learn my course (notes from lectures, typed up notes, occasionally concept map for hard parts, then the learning outcome answers in the notecard book) there you can see my notes on tissues. What happens when there is abnormal function of epithelial cells, how epithelial cells form glands and the two forms of glands - exocrine (has a duct) and endocrine (no duct).

Fun fun fun.