#10.5 Thirst Receptors & Brain Responses
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29 Terms
osmoreceptors
Receives signal of solute concentration
osmotic thirst receptors
osmoreceptors AKA
Organum Vasculosum Lamina Terminalis (OVLT)
OSMORECEPTORS <
Located near 3rd ventricle
Organum Vasculosum Lamina Terminalis (OVLT)
OSMORECEPTORS <
Monitors osmotic pressure
Organum Vasculosum Lamina Terminalis (OVLT)
OSMORECEPTORS <
Has weak blood-brain barrier → can sample blood directly
Organum Vasculosum Lamina Terminalis (OVLT)
OSMORECEPTORS <
Sensitive to high solutes, toxins, and hormones
Subfornical Organ (SFO)
OSMORECEPTORS <
Works with OVLT
Subfornical Organ (SFO)
OSMORECEPTORS <
Detects osmotic imbalance
Subfornical Organ (SFO)
OSMORECEPTORS <
Connects to hypothalamus to stimulate drinking
osmoreceptors
both receptors that trigger increased drinking, influence hypothalamus to release hormones, and control water retention & salt appetite
Supraoptic nucleus (SON)
WHERE SIGNALS FROM OSMORECEPTORS ARE SENT:
Release vasopressin (ADH)
Paraventricular nucleus (PVN)
WHERE SIGNALS FROM OSMORECEPTORS ARE SENT:
Release vasopressin (ADH) and Urine becomes concentrated
Paraventricular nucleus (PVN)
WHERE SIGNALS FROM OSMORECEPTORS ARE SENT:
Conserves water → kidneys reabsorb water
Lateral preoptic area
WHERE SIGNALS FROM OSMORECEPTORS ARE SENT:
Drives drinking behavior
vasopressin
hormone that is released by posterior pituitary
antidiuretic hormone (ADH)
vasopressin AKA
vasopressin
hormone that promotes water retention, constricts blood vessels, raises blood pressure, and reduces urination
Baroreceptors
HYPERVOLEMIC THIRST DETECTORS <
Located in blood vessels and the heart
Baroreceptors
HYPERVOLEMIC THIRST DETECTORS <
Signals the brain thru vagus nerve
kidneys
HYPERVOLEMIC THIRST DETECTORS <
Releases renin
renin
angiotensin cascade released by the kidneys
Angiotensin II
HYPERVOLEMIC THIRST:
hormone that Constricts blood vessels
Angiotensin II
HYPERVOLEMIC THIRST:
hormone that Raises blood pressure
Angiotensin II
HYPERVOLEMIC THIRST:
hormone that Stimulates thirst
Angiotensin II
HYPERVOLEMIC THIRST:
hormone that Stimulates salt appetite
Aldosterone
HYPERVOLEMIC THIRST:
hormone that is Produced by adrenal glands
Aldosterone
HYPERVOLEMIC THIRST:
hormone that Makes kidneys retain sodium
Aldosterone
HYPERVOLEMIC THIRST:
hormone that Makes salt taste more rewarding
Aldosterone
HYPERVOLEMIC THIRST:
hormone that Produces salt appetite
Note 
Flashcards (102)