scilearner Posted March 2, 2011 Posted March 2, 2011 Hello everyone, I have to write a simple essay about this,I know what to write but I'm stuck with the stimulus so can't start the essay. My text book is so vague. I want to know the stimulus in a haemorrhage. 1. Is it the decrease in renal perfusion pressure detected by afferent arteriole that secretes renin. 2. Or decrease in sodium chloride deteced by the macula densa that stimulates it. Thanks
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