Lab 9 Flashcards
Osmoreceptors in the hypothalamus of the brain are stimulated by a(n) __________ (increase/decrease) in the plasma osmotic pressure.
INCREASE
As a result of stimulation, the osmoreceptors stimulate the secretion of ________ from the _________________ gland
ADH, posterior pituitary
ADH stimulates the kidneys to_________________
Reabsorb H20 from the nephron
The hormone that stimulates the reabsorption of Na+ from the nephron tubules and also stimulates the secretion of K+ into the tubules is
Aldosterone from the adrenal cortex
The substance that stimulates vasoconstriction and also stimulates the secretion of aldosterone
Angiotensin II
The measurement is 1.000 for pure water, and that increases in proportion to the general solute concentration of a solution
Specific Gravity
the functional unit of the kidney
nephron
a tuft of capillaries consisting of the glomerulus and enclosed by the Bowman’s capsule
renal corpuscle
A component of the nephron, where filtrate flows from the renal corpuscle
renal tubule
A portion of the renal artery that supplies blood to the glomerulus
Afferent Arteriole
the filtration of blood through the glomerulus
Glomerular filtration
an arteriole that drains the glomerulus of blood remaining after filtration
Efferent Arteriole
A hormone that regulates NaCl reabsorption and excretion
Aldosterone
A hormone that causes the permeability of the distal tubule and collecting duct to increase, thus promoting fluid retention
ADH
the movement of filtered solutes and water from the lumen of the tubules back into the plasma
reabsorption
