Renal 28-33 Flashcards
What is the ratio of extracellular to intracellular fluid?
1/3 extra
2/3 intra
How do we maintain balance in the urinary system? 4
filtering blood and expelling excess water, salt, wastes of metabolism, toxins and drugs
True or false, the pH of urine is highly regulated
False
What are 3 things that are abnormal to find in urine
Large proteins
RBC
Glucose
What are the 4 things required for an effective urinary system?
DElivery system for blood
Selective filtration system
Filtrate recovery mechanism
System to return filtered fluid to the body
What are the 4 main components of the urinary system?
2 kidneys
2 ureters
Urinary bladder
Urethra
What are the 4 functions related to the structure of the kidney?
Blood can be brought within close proximity of the nephron
Blood that has been filtered can leave the kidney
A pathway for urine to be removed from the kidney
Protection
What structure is on the medial surface of the kidneys?
Hilum which is where the renal blood vessels, lymphatics, nerves, and ureter enter the kidneys
What are the kidneys surrounded and supported by?
Fat
Are the kidneys covered by peritoneum?
Yes, but only on the anterior wall
What are the 3 regions of the kidney?
Cortex, medulla, and pelvis
Describe the basic structure of the inner medulla
Divided into pyramids, and each pyramid ends in a papilla
Describe the basic structure of the outer cortex?
Continuous layers, renal columns
Describes a kidney lobe?
One medullary pyramid and the cortex that surrounds it, it is made up of npehrons.
Where does the urine collect when it drains from the papilla?
Calyx
What do calcyes join to form?
Renal pelvis
Where in the kidney does the filtration occur?
Cortex of the kidney
Where does the renal artery arise from?
Abdominal aorta
What vessel delivers blood from the arteries to the glomerulus?
Afferent arteriole
What is the glomerulus made of?
Glomerular capillaries
What vessel carries blood from the glomerulus to the peritubular capillaries
Efferent arterioles
Describe the flow of blood into the cortex 4
Renal artery
Series of arteies
Afferent Arteriole
Glomerular capillary
Describe the blood supply away from the cortex after being filtered 6
Glomerular capillary
Peritubular capillaries
Series of veins
Renal vein
inferior vena cava
What is the plexus of autonomic nerves in the kidneys called?
Renal plexus
How many nephrons are there in the kidney?
1 million
What is the role of the nephron?
Filter, they are responsible for urine formation
What are the 2 types of nephrons?
Cortical nephrons
Juxtamedullary nephrons
What nephron is predominant?
Cortical
What is the structure of the juxtamedullary nephron?
Extend deep into the medulla and are important for the formation of concentrated urine
What are the 3 main functions of the nephron?
Selectively filter blood
Return blood to be kept
Carry waste away for storage and expulsion
What are the 3 main structures in the nephron?
Glomerular capsule
Renal tubules (PCT, nephron loop, DCT)
Collecting duct
What are the 2 structures that nephrons are associated with?
Glomerulus and peritubular capillaries
Describe the structure of the glomerular capillaries
Thin walled layer of fenestrated endothelial cells, fed and drained by the arterioles, blood pressure is regulated
What is the function of the peritubular capillaries?
Receives filtered blood from the glomerulus via efferent arterioles and reabsorbed filtrate from the nephron.
Where are the peritubular capillaries located?
Wrapped around the renal tubules