<prompt> A 50 year old female goes into shock and her blood pressure was 50 mmHg. Which of the following concerning her GFR is most likely?Myogenic autoregulation will keep GFR constantAngiotensin II release will maintain normal GFRThe macula densa will cause constriction of the afferent aeriole to maintain GFRGFR will viually cease  <response>: Once blood pressure drops below about 60 mmHg, GFR will basically cease, although a very small amount of filtrate may continue to be produced. This is another reason why maintaining blood pressure is so impoant. 