Renal Filtration, Nephron Structure, and Kidney Function

Practice flashcards covering the internal structure of the kidney, podocytes, arteriole dynamics, urine formation, and renal health.

What specialized cells line the inside of the Bowman's capsule?

Podocytes

What are the microscopic openings between podocytes called where filtration takes place?

Slit pores

Why are proteins normally unable to pass through the slit pores into the Bowman's capsule?

They are structurally too big to fit through the slit pores.

What does the detection of protein traces in urine indicate?

Infection or structural damage

Through which vessel do blood proteins and filtered blood return to the body from the glomerulus?

The efferent arteriole

Which metabolic waste products are structurally small enough to fit through the slit pores?

Urea and uric acid

What painful condition can result if a person loses insufficient water and excretes crystals instead?

Kidney stones

The presence of glucose in urine serves as an indicator of which condition?

Diabetes

Under normal physiological conditions, which cellular process requires glucose?

Respiration

Aside from directional arrows, how can the afferent arteriole be distinguished from the efferent arteriole?

By diameter; the afferent arteriole is wider than the efferent arteriole.

Why is the blood entering the Bowman's capsule via the afferent arteriole under higher pressure?

To assist in pushing substances through the filter

What structural feature prevents the backflow of blood within low-pressure veins?

Valves

What problem arises when the filtration sieve of the Bowman's capsule is structurally broken?

It allows useful, large substances like blood and proteins to pass through into the urine.

Why does a gynecologist specifically monitor protein and blood levels in a pregnant patient's urine?

Pregnancy causes the kidneys to work harder, requiring monitoring to prevent damage.

For how many years has the speaker been seeing Doctor David as their physician?

$$25\,\text{years}$$

Into which kidney structures do the calyxes open?

The pyramids

Into which structure do the renal pyramids drain like a gutter?

The pelvis of the ureter

Through which tubes does urine drain from the left and right kidneys toward storage?

The ureters

For how many years has the speaker not practiced active medicine?

$$21\,\text{years}$$

Which three lifestyle factors work together to assist the digestive system and prevent constipation?

Fiber, water, and exercise

How can a stroke lead to kidney failure?

By interrupting or restricting blood flow to the organ

Which two essential substances must living kidney tissue continually receive to avoid tissue death?

Oxygen and glucose

What treatment cleans blood outside the body by passing it through an external nephron?

Dialysis

Which waste product found in urine can also be excreted in sweat?

Uric acid

Why is holding urine for too long considered harmful?

It puts pressure on the valves and keeps waste products inside the body.