EXERCISES, LESSON 8
REQUIREMENT. The following exercises are to be answered by completing the
incomplete statements. After you have completed all the exercises, turn to "Solutions to
Exercises" at the end of the lesson, and check your answers.
1.
The urinary system is a collection of organs to rid the body of n__________
s, created by the metabolism of
s. These organs remove the
n
s from the circulating
d, concentrate them into a fluid known
as
e, and eliminate the
e from the body.
2.
A nephron begins with a renal c
. The renal corpuscle is made up of
a double-walled c
and an arterial capillary network known as the g
.
Supplying blood to the glomerulus is an
t arteriole. Draining blood from the
glomerulus is an
t arteriole. Fluid from the blood in the glomerular capillary
passes into space between the inner and outer walls of the c
.
3.
The fluid, called f
, passes through the tubular system of the n
.
As this fluid passes through the tubular system, substances such as w
and
g
are reabsorbed and returned to the c
system. The resulting
c
d fluid is called
e.
4.
At the papilla, the urine empties into the c
s. The urine then flows into the
renal p
in the s
of the kidney. The urine then moves along the
s
drop by drop until it reaches the u
b
.
5.
The urinary bladder is highly specialized to
e urine until it is e
d
from the body. Thus, except for the trigone, the wall of the urinary bladder is very
ble.
When the transitional epithelium reaches the limit of its stretchability, a message
is sent to initiate the
ing reflex. There can be several i
s of stretching until
the limit of the urinary
r is reached.
6.
The urethra is the single tubular structure which connects the urinary bladder to
the
e. The female urethra is relatively s
t and s
t. The male urethra
has two more-or-less r
-a
turns.
Two muscular structures preventing urine from leaving the urinary bladder are
s. Urine is forced through them when the sphincters
x.
the u
Check Your Answers on Next Page
MD0007
8-7