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Flashcards in EXCRETION Deck (24)
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1

filtration

the excretory tubules collects as filtrate from the blood.
-taken into tubules as filtrate

2

reabsorption

the transport epithelium reclaims needed substances from the filtrate where they return to the body as fluids.
-reclaiming of substances in filtrate

3

secretion

other unwanted compounds are actively extracted from the body fluids and added to the filtrate for excretion
-other toxins in body put into filtrate

4

excretion

the filtrate leaves the body as urine

5

renal arteries

branch off the aorta and supply blood to the kidneys

6

renal veins

carry blood away from kidneys to inferior vena cava

7

nephron

the functional unit of the kidney

8

juxtamedullary nephron

dives deep into the medulla
enables mammals to produce urine that is hyper osmotic to the body fluids.

9

proximal tubule

salts water and nutrients are absorbed

10

descending limb

water reabsorption
water permeable but not very permeable to solutes

11

ascending limb

permeable to solutes, but not much to water.
osmolarity of the filtrate increases

12

distal tubule

regulates NaCl and K+ in body fluids.
varies absorption and secretion

13

collecting duct

plays role in how much NaCl is reclaimed in the filtrate

14

diuresis

removal of excess water in urine

15

diuretics

drugs that cause more excretion in urine

16

vasopressin

regulates water permeability
it has an ability to inhibit diuresis

17

vesa recta

peritubular cappillaries that dip into the medulla and go back up to the cortex

18

RAAS

renin- angiotensin-aldosterone system
responds to changes in blood volume

19

macula densa

senses fluid flow dynamics

20

juxtaglomerular cells

release renin

21

afferent arteriole

constricts in response to angiotensin 2

22

ANP

atrial natruiretic peptide

23

key to reabsorption and excretion

transporting epithelium

24

excretory systems all include

tubular like structure
large surface area
transport water, solutes, nitrogenous waste