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Regulation of Urine Concentration and Volume

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Regulation of Urine Concentration and Volume

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Questions and Answers

What is the main function of the kidneys in regulating urine concentration and volume?

Reducing blood pressure

Producing toxic by-products of metabolism

Increasing water reabsorption from the filtrate (correct)

Filtering non-toxic substances from the blood

Which hormonal mechanism is more sensitive to changes in blood pressure?

Atrial natriuretic hormone (ANH) mechanism

Renin-angiotensin-aldosterone (RAA) mechanism (correct)

Antidiuretic hormone (ADH) mechanism

All mechanisms have the same sensitivity to changes in blood pressure

Under what condition is the Renin-angiotensin-aldosterone (RAA) mechanism initiated?

Normal blood pressure conditions

High blood volume conditions

High blood pressure conditions

Low blood pressure conditions (correct)

What is responsible for the secretion of H+ into the urine and can directly regulate the pH of the body fluids?

Distal convoluted tubule Signup and view all the answers

In acidosis, what occurs when the pH of the blood falls below 7.35?

CNS malfunctions leading to disorientation Signup and view all the answers

What causes blood pH to rise toward its normal value?

Decreased rate of H+ secretion and increased rate of HCO3- reabsorption Signup and view all the answers

What is the main function of the kidneys in regulating blood volume and pressure?

Regulate the volume of urine produced Signup and view all the answers

What structure protects the kidneys from mechanical shock?

Adipose Tissue Signup and view all the answers

Where is the hilum located in each kidney?

On the medial side Signup and view all the answers

What is the main role of the renal sinus in the kidneys?

Contains blood vessels and part of the system that collects urine and adipose tissue Signup and view all the answers