Describe the general functions of the urinary system.

Question description

I have two quizzes that I really need to get an a on them. Each quiz is ten questions and I will provide all the information. I will also provide login information to who ever I pick.

WEEK 13 Folder: Quiz 10

The Urinary System

Textbook chapter: 25.

1. Describe the general functions of the urinary system.
2. Describe the gross anatomy of the organs of the urinary system, and their functions.
3. Trace the flow of urine through the nephron and larger organs until it is released from the body..
4. Describe the histology and anatomy of a nephron.
5. List the general functions of the nephron. Distinguish between the functions of filtration, reabsorption, and secretion.
6. Name the three layers of the urinary bladder, including the tissues of each, and their functions.

Be able to recognize the following structures.

urine nephron collecting ducts
calyces renal pelvis ureter urniary bladder
urethra urinary mucosa muscularis renal artery
afferent arteriole glomerular capillaries efferent arteriole glomerular capsule
PCT loop of nephron DCT

The Urinary System

Textbook chapter: 25.

Resources:

Use these web resources to supplement your studies of lecture notes and objectives.

Textbook (sample quizzes, labeling)-select a chapter number in pull down menu.

More online tutorials

Lecture Notes

I Functions of system

1) Maintains normal blood fluid volume and therefore blood pressure
2 ) Helps regulate normal blood hydrogen and bicarbonate ion levels and therefore blood pH.
3) regulates blood calcium, sodium and potassium levels
4) removes urea and ammonia

II. Kidneys: the major excretory organs

A. External Anatomy:

1) renal capsule – adheres directly to the kidney s surface
– dense irregular connective tissue |
– helps prevent infection
2). Renal Hilus; on the medial, concave surface
– leads into the renal sinus
– the ureters, blood vessels, lymphatics, and nerves enter or exit here
B. Internal Anatomy:

1. renal cortex – the outer region
a) contains the nephron ( glomerular corpuscle, proximal convoluted tubule, loop, distal convoluted ducts, collecting duct) which are the functional units of a kidney)

2. Renal medulla (inner region)
pyramids – cone-shaped tissue masses of the medulla containing ducts
calyces-open tubes
renal pelvis-open area

3. Blood flow
Blood originates at renal Artery, distributed throughout the kidney via a variety of arteries into the cortex where blood flows into the “afferent:” arterioles that regulate flow into the glomerular capillaries (where water and smaller substances are filtered into the glomerular capsule.). Non-filtered blood exits glomerular capillaries into “efferent” arteriole which regulates flow into the “vasa recta” capillaries. From there blood is drained via a variety of veins into the renal vein.

C. Microscopic Anatomy: Nephron

1) Glomerular capsule (Bowman s capsule) receives filtered blood from the very leaky glomerular capillaries (allowing filtration of blood components into nephron).

2) nephron tubules (includes proximal convoluted tubule, loop of nephron, distal convoluted tubule, collecting duct)- filtrate meanders through the tubules allowing tubular reabsorption (movement of substance back into blood supply) and tubular secretion (movement of substance from blood supply into urine).

D. Nephrons are the functional units of kidneys.
– functions blood by filtration (red blood cells, white blood cells, platelets and large proteins are prevented from being filtered into urine so are conserved by the body. Some filtered substances are then secreted (removing materials from blood into urine) or reabsorbed (reclaiming materials from urine into blood).

Glomerular capillaries allow filtration
Vasa recta capillaries allow reabsorption and secretion.

E. Filtrate/Urine flow in kidney
(microscopic:) glomerular capsule to PCT to Loop to DCT to collecting ducts to papillary ducts to (gross:) calyces to renal pelvis

III. Ureters:

– convey urine from the renal pelvis in kidneys to the urinary bladder
– enter the posterior wall of the urinary bladder

Three Layers

1. Mucosa; transitional epithelium
2. Muscularis; smooth muscle
3. Adventitia; outer layer, fibrous connective tissue
IV. Urinary Bladder:

Function – holds urine and ejects urine (micturition)

Filled by the paired ureters and ejects urine through opening of the urethra.

Three Layers:

1. Mucosa; transitional epithelium allows stretch to store urine.folded into rugae for even more stretch.
2. Muscularis; smooth muscle to eject urine.
3. Adventitia; outer layer, fibrous connective tissue or serosa (visceral peritoneum)

V. Urethra:

– drains urine from the urinary bladder and carries it outside of the body

A. Sphincters: two that control the release of urine

1) internal – involuntary
2) external urethral sphincter – voluntary
– surrounds the urethra as it passes through the pelvic floor
– skeletal muscle

Helpful web link

Entire system Urine flow
Blood>Filtrate in glomerular capsule of nephron>nephron tubules>pyramidal ducts>calyces>renal pelvis>ureter>urinary bladder>urethra

A web activity

Another web activity

VI. Urinary hormones
A. ADH
Hypothalamus and Posterior Pituitary – releases ADH
– known as the neurohypophysis
– sits in the sella turcica or sphenoid bone

ADH causes the collecting ducts of the kidneys to reabsorb water more, thereby increasing blood volume and blood pressure. It decreases urine output.

B. Aldosterone
Adrenal cortex-produces Aldosterone
Adosterone promotes Na reabsorption and K secretion at the collecting ducts.So Na is reclaimed and K is lost into the urine

BSC 1083 chapter objectives
The Reproductive System

find the cost of your paper
Order now to get your homework done

Clarify the role of each legally mandated attendee on the Individualized Education Program team

This discussion assesses your ability to clarify the role of each legally mandated attendee on the Individualized Education Program team. This assessment also supports your achievement of Course Learning Outcome….

Describe the performance of “Salt Peanuts” provided in your Module 3 Playlist

n 100 words or more, describe the performance of “Salt Peanuts” provided in your Module 3 Playlist. Being a live performance, there are certain characteristics that we don’t have in….

Analyze the fixed and variable costs of a firm, how those costs have changed over time, and how those changes have impacted the firm’s overall health and sustainability

The purpose of this milestone is for students to explore the various costs their firm faces and to describe their firm’s market. Using the concepts and tools developed in Modules….