Renal Physiology: Reabsorption and Secretion

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What is the movement of filtered solutes and water from the lumen of the tubules to the plasma fluid compartment called?

Active Transport
Excretion
Reabsorption (correct)
Secretion

What is the result of increasing the plasma osmolarity during active transport?

Water secretion
Increased water reabsorption (correct)
No change in water reabsorption
Decreased water reabsorption

Which of the following is NOT a characteristic of passive reabsorption?

Solutes are transported from the lumen to the plasma
Follows the same processes of active transport, just in reverse
Requires energy (correct)
Based on differences in osmolarity

What is the primary function of regional specialization of the renal tubules?

To vary transported items and mechanisms (A) Signup and view all the answers

What determines the rate of excretion of a substance in the urine?

The rate of excretion is determined by the amount of substance that enters the lumen of the renal tubules and is not reabsorbed (D) Signup and view all the answers

What is the term for the elimination of solute and water from the body in the form of urine?

Excretion (D) Signup and view all the answers

What is the main driving force for the filtering process in the glomerulus?

Blood pressure as it enters the glomerulus (C) Signup and view all the answers

What is the term for the fluid inside the nephron?

Filtrate (B) Signup and view all the answers

What type of transport occurs in active reabsorption?

Active transport across one membrane and passive transport across another (C) Signup and view all the answers

What is the direction of movement in tubular secretion?

From the blood to the filtrate (C) Signup and view all the answers

What is the term for the process of removing substances from the body via the kidneys?

Tubular secretion (D) Signup and view all the answers

What opposes the outward pressure of blood pressure in the glomerulus?

All of the above (D) Signup and view all the answers

What is the primary function of the glomerular filtration barrier in the kidneys?

To selectively allow the passage of small molecules while restricting larger ones (A) Signup and view all the answers

What is a possible reason for proteinuria?

Overload of the filtration system (B) Signup and view all the answers

Which of the following components of the glomerular filtration barrier is responsible for selectively allowing the passage of small molecules?

Fenestrated endothelium (D) Signup and view all the answers

What is the result of damage to the glomerular filtration barrier?

Proteinuria due to the passage of proteins into the urine (B) Signup and view all the answers

What is the primary function of the renal tubule epithelium in the nephron?

To regulate the solute reabsorption in the nephron (A) Signup and view all the answers

What is the term for the abnormal presence of protein in the urine?

Proteinuria (D) Signup and view all the answers