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NEET Questions / Zoology / Excretory Products And Their Elimination / Human Excretory System
Which of the following is NOT a function of the kidneys?
Regulation of blood pressure
Regulation of blood pH
Production of urea
Removal of metabolic wastes
The counter-current mechanism in the nephron is primarily responsible for:
Filtering the blood
Secreting hormones
Concentrating the urine
Regulating blood pH
Which hormone plays a significant role in increasing water reabsorption in the collecting ducts?
Aldosterone
ADH
Renin
Angiotensin II
Glomerular filtration rate (GFR) is a measure of:
The amount of blood passing through the kidneys per minute
The amount of urine produced per minute
The amount of filtrate formed by the kidneys per minute
The concentration of urine
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Nephrons are classified into cortical and juxtamedullary types based on their location within the kidney.
Reason R: Cortical nephrons possess short loops of Henle, while juxtamedullary nephrons have long loops of Henle extending deep into the medulla.
In the light of the above statements, choose the correct answer from the options given below:
Both A and R are true and R is the correct explanation of A
Both A and R are true but R is NOT the correct explanation of A
A is true but R is false
A is false but R is true
Which of the following statements correctly describes the difference between cortical and juxtamedullary nephrons?
Juxtamedullary nephrons are located entirely in the cortex, while cortical nephrons are found in both the cortex and medulla.
Juxtamedullary nephrons have long loops of Henle that extend deep into the renal medulla and are associated with vasa recta, while cortical nephrons have short loops of Henle that barely enter the medulla and are not associated with vasa recta.
Cortical nephrons are responsible for concentrating urine, while juxtamedullary nephrons primarily filter blood.
Both cortical and juxtamedullary nephrons have identical structures and functions, but are located in different regions of the kidney.
The length of the loop of Henle in juxtamedullary nephrons is crucial for:
Filtering blood
Secreting hormones
Concentrating urine
Regulating blood pressure
If a person's kidneys primarily contained cortical nephrons, what would be the likely consequence?
Highly concentrated urine
Reduced filtration rate
Production of dilute urine
Increased blood pressure
