According to the myogenic hypothesis of renal autoregulation, the afferent arterioles contract in response to stretch induced by: (A) NO release, (B) Noradrenaline release, (C) Opening of Ca2+ channels, (D) Adenosine release
Answer is C. According to the myogenic hypothesis of renal autoregulation, the afferent arterioles contract in response to stretch by the opening of Ca2+ channels, whereas, tubuloglomerular feedback is due to the opening of ligand-gated Ca2+ channels by adenosine.