year notes USABO Exam Questions And Answers

year notes USABO Exam Questions And Answers axon hillock - ANS the cone-shaped area on the cell body from which the axon originates -trigger zone hyperopia - ANS A condition in which visual images come to a focus behind the retina of the eye and vision is better for distant than for near objects -- called also farsightedness. axon hillock has high concentration of what voltage gated pumps - ANS sodium and potassium how to calculate membrane potential - ANS the outside of the neuron, the other side of the membrane is always zero ions inside neuron - ANS K+, Na+ and proteins Protein charge - ANS The net charge of a protein decreases linearly with molecular weight, with small proteins being mostly positively charged and large proteins negatively charged. Astrocytes - ANS Star shapes neuron cells Functions 1. Create blood barrier function and prevent diffusion and passage of pathogens in vessels by using podocytes (foot like extensions) 2. Prevents hemmorage 3. Creates scarring in response to damage in between neurons? all clotting factors are made in the liver EXCEPT - ANS Factor 8 and 4 Billrubin function - ANS Just a waste product of atrophied rbc But has some antioxidant effect