BIO 373 UNIT 4CD TEXTBOOK EXAM
QUESTIONS AND ANSWERS
Insensible water loss - Correct Answers -not normally aware of it, occurs across skin
surface and through exhaling humid air around 900 ml per day
diuresis - Correct Answers -removal of excess urine
diuretics - Correct Answers -drugs that promote the excretion of urine
AQP2 - Correct Answers -water channel regulated by vasopressin, may be found on the
apical membrane facing the tubule lumen and in the membrane of cytoplasmic storage
vesicles
Osmoreceptors - Correct Answers -osmolarity is monitored by these stretch- sensitive
neurone that increase their firing rate as osmolarity increases, when these shrink, cation
channels linked to actin filaments open, depolarizing the cell/ primary osmorecptors for
vasopressin release are in the hypothalamus
nocturnal enuresis - Correct Answers -bed wetting children have a developmental delay
in normal pattern of increased vasopressin secretion at night with less vasopressin, the
children's urine output stays elevated causing the bladder to fill its max capacity and
empty spontaneously during sleep, can be traced with nasal spray
diabetes insipidus - Correct Answers -Large volumes of dilute urine produced in the
absence of adequate vasopressin activity
Acidosis - Correct Answers -pH is too low, neurone are less excitable, confusion,
disoriented and slip into comas can lead to death
- kidneys excreted H+ and reabsorb K+ using H+, K+ ATPase
QUESTIONS AND ANSWERS
Insensible water loss - Correct Answers -not normally aware of it, occurs across skin
surface and through exhaling humid air around 900 ml per day
diuresis - Correct Answers -removal of excess urine
diuretics - Correct Answers -drugs that promote the excretion of urine
AQP2 - Correct Answers -water channel regulated by vasopressin, may be found on the
apical membrane facing the tubule lumen and in the membrane of cytoplasmic storage
vesicles
Osmoreceptors - Correct Answers -osmolarity is monitored by these stretch- sensitive
neurone that increase their firing rate as osmolarity increases, when these shrink, cation
channels linked to actin filaments open, depolarizing the cell/ primary osmorecptors for
vasopressin release are in the hypothalamus
nocturnal enuresis - Correct Answers -bed wetting children have a developmental delay
in normal pattern of increased vasopressin secretion at night with less vasopressin, the
children's urine output stays elevated causing the bladder to fill its max capacity and
empty spontaneously during sleep, can be traced with nasal spray
diabetes insipidus - Correct Answers -Large volumes of dilute urine produced in the
absence of adequate vasopressin activity
Acidosis - Correct Answers -pH is too low, neurone are less excitable, confusion,
disoriented and slip into comas can lead to death
- kidneys excreted H+ and reabsorb K+ using H+, K+ ATPase
