Lab 9 - Urinary System Flashcards Preview

Bio 226 Lab > Lab 9 - Urinary System > Flashcards

Flashcards in Lab 9 - Urinary System Deck (26):
1

What are the functions of the urinary system?

1. Excrete wastes (toxins, metabolic wastes, and excess ions) by forming urine

2. Maintain balance in:
- Electrolytes
- Water
- Acids/Bases

2

3 Processes Conducted by the Nephron

1. Filtration
2. Secretion
3. Reabsorption

3

Which of the 3 processes conducted by the nephron occur simultaneously?

Secretion and reabsorption

4

Describe filtration

- Passive process
- Hydrostatic pressure (driving force) increases the rate of filtration
- Increased BP means increased filtration rate

5

2 million nephrons filter about ___ liters of blood per day.

150

6

Describe secretion

- Active process
- Additional, unwanted materials are secreted into the tubules from the blood vessels for excretion

7

Describe reabsorption

- Passive and/or active process
- Wanted materials are returned to the blood from the renal tubules

8

Anatomical units that form urine within the kidney

Nephron

9

What are the main parts of the nephron?

1. Glomerulus
- Surrounded by Bowman's capsule

2. Renal tubules, including:
- Proximal convoluted tubule
- Loop of Henle
- Distal convoluted tubule
- Collecting duct

10

Flow of blood through the kidney:

Renal artery --> ___

Interlobar artery

11

Flow of blood through the kidney:

Interlobar artery --> ___

Arcuate artery

12

Flow of blood through the kidney:

Arcuate artery --> ___

Cortical radiate artery

13

Flow of blood through the kidney:

Cortical radiate artery --> ___

Afferent arteriole

14

Flow of blood through the kidney:

Afferent arteriole --> ___

Glomerular capillaries

15

Flow of blood through the kidney:

Glomerular capillaries --> ___

Efferent arteriole

16

Flow of blood through the kidney:

Efferent arteriole --> ___

Peritubular capillaries

17

Flow of blood through the kidney:

Peritubular capillaries --> ___

Vasa recta

18

Flow of blood through the kidney:

Vasa recta --> ___

Cortical radiate vein

19

Flow of blood through the kidney:

Cortical radiate vein --> ___

Arcuate vein

20

Flow of blood through the kidney:

Arcuate vein --> ___

Interlobar vein

21

Flow of blood through the kidney:

Interlobar vein --> ___

Renal vein

22

List the kidney structures through which blood flows (in order of flow)

1. Renal artery
2. Interlobar artery
3. Arcuate artery
4. Cortical radiate artery
5. Afferent arteriole
6. Glomerular capillaries
7. Efferent arteriole
8. Peritubular capillaries
9. Vasa recta
10. Cortical radiate vein
11. Arcuate vein
12. Interlobar vein
13. Renal vein

23

Stores urine until it can be voided

Bladder

24

In charge of involuntary control of micturition

Internal urethral sphincter

25

In charge of voluntary control of micturition

External urethral sphincter

26

Normal urinary output

1 - 1.8 liters/day