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Why is the concentration of urea higher in the urine than in the filtrate?


The processes that result in the glucose concentrations?


When a nerve impulse passes from one neuron to another, it causes the release of neurotransmitter from versicles a fused to the membrane of the synaptic knob. Neurotransmitter is released into the synaptic  cleft and then binds to receptor on the ion  channel. How does this lead to setting up an action potential in the next neuron?



The immune systems Primary role is to defend against pathogens. For this to be affective the immune system must be able to recognise cells that belong to the body and cells that do not.

What is the mechanism that the immune system uses to distinguish between body cells and potential pathogens? 


why is this mechanism means that patients who receive and organ donation require immune suppression drugs?



The combined effects of porosity and strain rate on bone strength have been expressed by the following equation: where is the relative density. If the fracture stress of compact bone at 10 −3 s −1 is equal to 120 MPa, what is the fracture strength of cancellous bone with 50 vol.% porosity at 10 s −1?


In children, adult hemoglobin - HbA completely replaces fetal hemoglobin - HbF at age? 1) 1 year old 2) 2 years old 3) 3 years old 4) 5 years old


How many times faster is the regeneration of the skin wound of a 10-year-old boy compared to that of a 60-year-old? 1) 3 times 2) 5 times 3) 6 times 4) 10 times


Teeth shaped structures on the moss capsules specialized to enhance spore discharge


Describe methods of food chain


why hight power magnifaction is not used in the beginning whale fixing specimen in the compound microscope


Demonstration of Donnan Membrane Equilibrium

Before and after standing of: Water + NaOH


Does active transport need energy from respiration?


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