URETHRA

Question 1

drains urine from the bladder and conveys it out of the body

Answer 1

Urethra

Question 2

Componets of Urethra

Answer 2

• Smooth m
• Inner Mucosa

Question 3

Epithelium Lining of the Urethra
* Proximal:
* Middle:
* Distal:

Answer 3

• Proximal: Transitional Epithelia
• Middle: Stratified & Pseudostratified Columnar Epithelium
• Distal: Stratified Squamous

Question 4

Sphincter located at the bladder–urethral junction
* Type
* Function

Answer 4

Internal Urethral Sphincter
* Type: Involuntary SM
* Function: Keeps the urethra closed when urine is not being passed

Question 5

Sphincter that surrounds the urethra within the urogenital diaphragm
* type:
* Function:

Answer 5

External Urethral Sphincter
* Type: Skeletal Muscle
* Function: Inhibit urination voluntarily until the proper time

Question 6

External Urethral Sphincter surrounds the urethra within the —

Answer 6

urogenital diaphragm

Question 7

Internal Urethral Sphincter is located at the —

Answer 7

bladder–urethral junction

Question 8

muscle that voluntarily constricts the urethra that’s located on the pelvic floor

Answer 8

Levator Ani muscles

Question 9

What epithelia is sparse in female urethra

Answer 9

Stratified and Pseudostratified Columnar Epithelia

Question 10

Length of the:
* Female Urethra
* Male Urethra

Answer 10

• Female Urethra: 3 - 4 cm or 1.5 inch
• Male Urethra: 20 cm or 8 inches

Question 11

The female urethra is bound to the __

Answer 11

Anterior Wall of the vagina

Question 12

The female urethra opens externally @ the ___
* location of the opening

Answer 12

External Urethral Orifice
* anterior to the vaginal opening and posterior to the clitoris

Question 13

3 regions of the male urethra

Answer 13

1. Prostatic Urethra
2. Membranous Urethra
3. Spongy Urethra

Question 14

Region of the urethra that is the most dilatable
* Hugged by which structure

Answer 14

Prostatic Urethra
* Prostate Gland

Question 15

Least dilatable region of the urethra
* passes through the __

Answer 15

Membranous Urethra
* Passes through the Urogenital Diaphragm

Question 16

longest region of the male urethra
* passes through the –
* opens to the

Answer 16

Spongy Urethra
* Passes through the Penis
* Opens to the External Urethral Orifice

Question 17

Narrowest area of the male spongy urethra

Answer 17

External Urethral Orifice

Question 18

Narrowest area of the male spongy urethra

Answer 18

External Urethral Orifice

Question 19

Enumerate the process of micturation

Answer 19

1. Bladder Stretches => Visceral Afferent impulses are transmitted to the Spinal Cord => Pontine Micturation Center => Micturation Response
2. PSNS Efferents causes Detrusor m. to contract and Internal Urethral Sphincter to open
3. SNS Efferents are inhibited
4. Somatic Motor Efferents are inhibited => External US Relaxes => Urine Passes

Question 20

When is the control of External Urethral Sphinter attained

Answer 20

Once the nervous system of a child matures

Question 21

What happens to the kidneys as we age?

Answer 21

• Kidneys shrink
• Nephrons decrease in size and number
• Tubules become less efficient in reabsorption

Question 22

What condition usually affects the kidney’s ability to filtrate blood?

Answer 22

Atherosclerosis