Urinary System Practice Quiz

Which statement about movement of glucose and amino acids in the kidney is false?

 

They are reabsorbed into the nephron tubule cells by primary active transport

Urea formed in the liver from breakdown of amino acids during protein metabolism is filtered and partially reabsorbed.

True

An increase in plasma Na+ directly stimulates the secretion of aldosterone from the adrenal cortex.

False

Both ADH and aldosterone increase blood volume, while angiotensin II stimulates vasoconstriction, causing increased blood pressure.

True

Which statement about aldosterone is false?

 

it indirectly promotes salt and water excretion

Antidiuretic hormone (ADH)

 

all of these are correct

Which substance is filtered by the glomerulus and thus is found in the ultrafiltrate?

 

electrolytes

A drop in blood pressure releases local chemicals ( aka paracrines) that dilate afferent arterioles, keeping GFR relatively constant.

True

What event does NOT happen in the proximal tubules?

 

Reabsorption of solutes leaves the filtrate hypotonic

Which statement is false?

 

Interaction between the ascending and descending limbs of the loop produces a negative feedback loop

The glomerulus is the "filter" of the kidney, forming filtrate from blood.

True

Which statement about GFR is false? 

 

GFR increases during fight or flight situations due to vasoconstriction of afferent arterioles

Approximately two-thirds of salt and water in the original filtrate is reabsorbed from the proximal tubule and returned to the blood.

T

Because plasma proteins are present in blood but not in medullary fluid, water is removed from the medulla by the capillaries of the vasa recta..

T

Which substance is filtered and completely reabsorbed?

glucose

Atrial naturetic peptide (ANP)

 

all of these are true