Ch. 48b Flashcards Preview

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Flashcards in Ch. 48b Deck (16):
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Process of urine function

Filtration
Reabsorption
Secretion

1

Structure of kidney

Renal cortex- outermost portion, makes 1/3 tissue mass
Renal medulla- inner 2/3 of kidney
Renal pelvis- funnel shaped
Renal artery- brings blood into kidney

2

Reaborption

At proximal convoluted tubule
-75% of water is reabsorbd

3

Urinary system

Must produce about 500 mL of urine/day to remove toxic material from body and maintain homeostasis
- produces about 1.5 to 2.5L

4

Collecting duct

Urine from several renal tubules flow into duct
More water is absorbed
1% of original filtrate water passes out as urine

5

Parts of a nephron

Bowman's capsule
Glomerulus
Capillaries
Loop of henle
Proximal convoluted tubule
Distal convoluted tubule
Collecting duct

6

Skin in excretion

Removes nitrogenous waste( a little), salt, and water

7

Function of kidneys regarding excretion

Remove nitrogen waste, salt, and other waste

9

Structure of urinary system

Kidneys -ureters -urinary bladder -urethra

10

Organs of excretion

Kidneys
Lungs
Skin

11

Secretion

At distal convoluted tubule
Other wastes and toxic materials pass out of blood

11

Formation of nitrogenous wastes

Produced from breakdown of proteins

12

Loop of henle

Maintains concentration of NaCl for osmosis of water to occur
Actively transports Cl- out and Na+ follows
Establishes concentration gradient

13

Nitrogenous wastes

Excreted from kidneys to help dissolve wastes
(as ammonia) goes to liver and is converted to less harmful urea

15

Filtration

-Water, urea, glucose, vitamins, and salt pass out of the blood in the glomerulus and into Bowman's capsule
- proteins and cells are too large to pass through

15

Lungs in excretion

Remove carbon dioxide and water