Chapter 24 Part 2 Flashcards Preview

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Flashcards in Chapter 24 Part 2 Deck (41):
1

BP within glomerulus high due to arteriole size; pushes water and solutes out of blood to capsular space

Glomerular hydrostatic pressure

2

What will increase glomerular hydrostatic pressure?

Afferent arteriole is wider and efferent arteriole is smaller

3

Oppose glomerular hydrostatic pressure, pulls fluid back into capillary

Blood colloid osmotic pressure

4

Oppose glomerular hydrostatic pressure; pressure in Bowman's capsule, impedes movement of water and solutes

Capsular hydrostatic pressure

5

Rate at which the volume of filtrate is formed

Glomerular filtration rate

6

What are some influencing factors of GFR?

net flirtation pressure, renal auto regulation

7

what happens to GFR when you increase net filtration pressure

increase

8

Maintains BP and GFR

renal autoregulation

9

Maintain normal glomerular BP; cause smooth muscle cells to relax which causes blood volume to increase which helps with GFR and glomerular BP to stay constant

Mogenic mechanism

10

Increases systemic BP by increasing NaCl in filtrate, signals smooth muscle cells on afferent arterioles to vasoconstrictor which causes a decrease in blood volume

Tubuloglomerular feedback mechanism

11

Decrease urine output to conserve fluid; AP is sent to afferent and efferent arterioles which result in vasoconstriction which decreases blood flow causing glomerular BP to decrease

Sympathetic stimulation

12

What is the stimulus for hormonal control to regulate GFR

Stretch in the atria

13

Released from heart and targets afferent arterioles that causes vasodilation, increases blood flow going in glomerulus, glomerular pressure increases and GFR increases

Atrial natriuretic peptide

14

What nutrients are reabsorbed in the proximal convoluted tubules?

Glucose, amino acids, lactate

15

What hormones and proteins are reabsorbed in the PCT

Insulin, angiotensin, any hormone/protein

16

Where does sodium reabsorption occur in the nephron loop?

All through the loop

17

Produced by adrenal cortex; secreted in response to high K+ and low Na+ levels in blood, increases the number of sodium potassium pumps which increase the reabsorption of sodium and secretion of potassium

Aldosterone

18

Produced by the heart; stimulus from stretch of heart wall; inhibit reabsorption of sodium (more sodium in nephron),

Atrial natriuretic peptide

19

where does water absorption occur?

Entire nephron

20

Where does potassium absorption occur?

Mostly PCT

21

Cells that reabsorb K+ continuously (not dependent on anything)

Intercalated cells

22

Cells that secrete K+ based on aldosterone

Principle cells

23

Where are bicarbonate ions absorbed?

mostly PCT

24

Why do we need HCO3?

Control pH (buffers hydrogen ions)

25

part of the nephron that regulates urine pH

collecting duct

26

What are the 3 waste products?

Urea, uric acid, creatinine

27

Protein breakdown in liver

urea

28

Where is urea filtered?

Glomerulus

29

Nucleic acid breakdown in liver

Uric acid

30

where is uric acid filtered?

Glomerulus

31

Metabolism in muscle tissue

creatinine

32

Where is creatinine secreted?

DCT

33

What 2 mechanisms create a concentration gradient in the kidneys?

Countercurrent multiplier and countercurrent exchange

34

Contraction of internal urethral sphincter, inhibits contraction of detrusor muscle

Sympathetic neurons

35

Contraction of detrusor muscle, relaxation of internal urethral sphincter

Parasympathetic neurons

36

Contraction of external urethral sphincter

Somatic motor neurons

37

What is the storage reflex controlled by?

Sympathetic stimulation and somatic motor stimulation

38

Allows relaxation of detrusor muscle, contraction of internal urethral sphincter to store urine

Sympathetic stimulation

39

Allows contraction of external sphincter to keep urine in

Somatic motor stimulation

40

What is the micturition reflex controlled by?

Parasympathetic and somatic nervous system

41

What is the reflex pathway for micturition?

1. baroreceptors detect stretch of bladder wall, AP created
2. AP sent to ons and bladder
3. Results end with detrusor muscle to contract and internal urethral sphincter relax
4. AP sent to cerebral cortex for sensation ot urinate