Exercise 9: Urinary System: Physio Quiz

Question 1

(T/F) Juxtamedullary Nephrons allow for less water absorption than cortical nephrons because of their long Loops of Henle.

Answer 1

False: Juxtamedullary Nephrons allow for MORE water absorption than cortical nephrons because of their long Loops of Henle.

Note: the longer the loop, the purer the urine

Question 2

What opposes filtration?

Answer 2

Blood Colloid Osmotic Pressure / Capsular Hydrostatic Pressure

Question 3

Major Functions of the Kidneys:

Answer 3

• Regulation of blood ionic composition
• Regulation of blood volume
• Regulation of blood pressure
• Regulation of blood pH

NOT Regulated by Kidneys: Blood cell size

Question 4

In the first step of urine formation, fluid is filtered from the glomerular capillaries into Bowman’s capsule through….

Answer 4

the afferent arteriole

Question 5

(T/F) Within the nephron, the driving force for filtration is glomerular blood hydrostatic pressure.

Answer 5

True

Question 6

(T/F) Urine is typically slightly acidic, with an average pH of around 6.0.

Answer 6

True

Question 7

If a person had been on a starvation diet, on a urinalysis, what would have an abnormal value?

Answer 7

pH, and Ketone would be abnormal

Question 8

Solutes seen in normal urine…

Answer 8

• Urea
• Sodium
• Creatine
• Potassium

Question 9

In the urinary system, what is under voluntary control? What is Involuntary?

Answer 9

Voluntary Control:

• External Sphincter

Involuntary Control:

• Ureter
• Detrusor Muscle
• Internal Sphincter