Bio 253 final Exam 195 Questions With Complete Solutions.
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Course
Bio 253
Institution
Bio 253
Bio 253 final Exam 195 Questions With Complete
Solutions.
Organelles are - -
Organs of the Urinary system - -kidneys, ureters, urinary bladder, urethra
draw and label a kidney with the following terms: Cortex, Medulla, Pelvis, renal artery, renal
vein, ureter, nephron - -
functional unit of t...
, Bio 253 final Exam 195 Questions With Complete
Solutions.
-efferent arterioles branch into peritubular capillaries around PCT and DCT
How is urine made in the kidney? - -1.)Reabsorption - moving substances with tubule
into the blood.
2.)filtration - occurs in the glomerulus or renal corpuscle
3.)secretion
4.)filtration
driving force for filtration - -hydrostatic pressure or BP
What fluid comes out of the glomerulus? - -filtrate
What is filtrate? - -mostly water, electrolytes, nutrients, and waste products. Glucose
is normal in filtrate.
-similar to blood plasma
Reabsorption in the Nephron Loop - -Only water is absorbed in the descending limb.
Na+ chloride is absorbed in the ascending limb (no water).
Status of water coming out of nephron loop? - -@ Lowest concentration (diluted)
Process taking place in nephron loop? - -Countercurrent mechanism (dilutes the
urine). Can also create concentrated urine from the Na+ absorbed in the ascending limb.
tubular secretion - --selectively moves substances from blood to filtrate in renal
tubules and collecting ducts
-From blood to tubular
-Usually in the distal tubule
-K+, H+, Uric acid, Penicillin are secreted
Hormones that regulate kidney function - -directly :
, Bio 253 final Exam 195 Questions With Complete
Solutions.
ADH
Aldosterone
ANH
indirectly :
Renin (created by kidney)
Angiotensin
Aldosterone function - --decreases sodium and water loss in urine by returning
sodium and water to the blood
Aldosterone: Target Cells - -kidneys
ANH function - -Tells kidneys that blood volume is too high, so dumps out H20 and
Na+
Effects of ADH - -increases reabsorption of water from urine back into plasma and
therefore, decreases the volume of water that is excreted
-secreted by posterior pituitary gland
-when a person is dehydrated, hypothalamus makes them thirsty and retains more water
because of the ADH
flow of urine through kidney - -Glomerulus
Bowmans Capsule
Proximal convoluted tubule
Loop of Henle
Distal convoluted tubule
Collecting duct
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