SA node has an unstable resting membrane potential.

The “resting membrane potential” of the sinus nodal fiber between discharges has a negativity of about −55 to −60 millivolts.

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#Unit 7. System Physiology – Animal

The receptor for ADH on vascular smooth muscle  V1 receptor, which is coupled via a Galpha q protein

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#Unit 7. System Physiology – Animal

Central diabetes insipidus – Failure to Produce ADH Nephrogenic diabetes insipidus - Inability of the Kidneys to Respond to ADH

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#Unit 7. System Physiology – Animal

Important neuronal area in controlling osmolarity and ADH secretion is located along AV3V region 

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#Unit 7. System Physiology – Animal

In AV3V region, two structures called osmoreceptors:

subfornical organ

organum vasculosum

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The anterior pituitary secretes six peptide hormones: 

TSH, FSH, LH, GH, prolactin, & ACTH

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#Unit 7. System Physiology – Animal