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NDSU Human Biology Chapter 10
Urinary System
28
Biology
Undergraduate 2
10/22/2009

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Term
Urinary System includes:
Definition
Kidneys, ureters, bladder, urethra
Term
Kidney
Definition
A major homeostatic organ of the body
Term

Kidneys filter____ of blood/minute.

Producing ____ of blood/minute.

Definition

1 ml

1 ml

Term
Ureters
Definition
Tubes that transport urine from kidneys to the bladder
Term
(Urinary) Bladder
Definition
Stores urine until micturition (urination)
Term
Micturition
Definition
Urination
Term
Urethra
Definition
Single tube running from the bladder to an external orifice
Term

Male urethra is ____ long

Purpose is ____ & ____

Definition

20 cm

Urinary & Reproductive functions

Term

Female urethra is ____ long

Purpose is ____, no ____ functions

Definition

4 cm

Urination, reproductive

Term
The urethra ends at an ____ ____ ____
Definition
external urethral orificle
Term
External urethral orifice
Definition
Opening to external environment
Term
Each urethra has an _____ and ____ sphincter
Definition
internal and external
Term
Sphincter
Definition
Controls the release of urine
Term
Urinary system functions
Definition
Excretion of metabolic wastes from the body, primarily nitrogeneous waste
Term
Urea
Definition
A byproduct of AA metabolism
Term
Creatinine
Definition
Breakdown of creatine phosphate
Term
Uric acid
Definition
Breakdown of nucleotides
Term

Metabolic wastes excreted from the body:

____, ____, and ____

Definition
Urea, creatinine, and uric acid
Term
Maintenance of water
Definition
salt balance (electrolytes)
Term

The more ____ in the blood, the more ____ in the blood =

____ ____ and ____

Definition

salts, water

blood volume and pressure

Term

Maintenance of acid-base balnance

Blood pH of ____, slightly ____

Excrete ____ and reabsorb ____

Urine pH ____, ____

Definition

7.4, basic

H+ and bicarbonate ions (HCO3-)

6, acidic

Term

Secretion of hormones

____ causes adrenal glands to release ____ (water-salt balance)

____ stimulate ____ production

Definition

Renin, aldosterone

Erythropoietin, RBC

Term

Kidney anatomy

Covered with a ____ ____ ____ and surrounded by ____ ____

Definition
fibrous renal capsule, fat deposits
Term

Kidney anatomy

Located

Definition
retroperitoneal
Term
Retroperitoneal
Definition
Meaning they are located underneath the parietal peritoneum
Term

Kidney anatomoy

____ ____ provide the kidneys with ____

Definition
Renal arteries, blood
Term

Nephron structure

The ____ is the only ____ pressure ____ system in the body

Definition
glomerulus, high, capillary
Term

The ____ arteriole is ____ in diameter than the ____ arteriole

Resulting in ____

Definition
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