Intro to Urinary System

Question 1

The substance most often measured to determine normal kidney function is:

Answer 1

Creatinine.

Question 2

In the average bladder, what amount of urine would cause a moderately distended sensation and the desire to void?

Answer 2

250ml

Question 3

The mechanism for voiding begins with?

Answer 3

The relaxation of the internal sphincter

Question 4

How does oxygenated blood enter each kidney?

Answer 4

Oxygenated blood enters each kidney via a renal artery

Question 5

Which hormone tends to decrease the amount of urine produced?

Answer 5

Aldosterone

ADH

Question 6

How does deoxygenated blood exit each kidney?

Answer 6

Deoxygenated blood exits each kidney via a renal vein

Question 7

What does the urethers do?

Answer 7

• Carry urine from the kidneys to the bladder

Question 8

What are the three movements of urine?

Answer 8

1. Peristaltic contractions
2. Hydrostatic pressure
3. Gravity

Question 9

How is the back flow of urine prevented?

Answer 9

One way valves between each ureter and bladder

Question 10

What are the components required to urinate?

Answer 10

Stimulus
Pathway
Effectors

Question 11

What is the voluntary effector that enables us to control when we go to the toilet?

Answer 11

External sphincter - the external sphincter constricts to consciously prevent urination

Question 12

What is the role of the pelvic floor muscles?

Answer 12

To control the external sphincter