STANDARD Zoology Excretory Products And Their Elimination Class 11 Questions

In man, the urea is mainly produced in

Aquatic reptiles are

Which one of the following statement is incorrect?

Kidneys are reddish brown, bean-shaped structures situated between the levels of _______ thoracic and ______ lumbar vertebrae

In humans, majority of nephrons have their Loop of Henle's ;

The following substances are the excretory products in animals. Choose the least toxic form among them

The liquid which is collected in the cavity of Bowman's capsule is

Identify the true statements and choose the correct option accordingly I. Blood vessel leading to the glomerulus is called efferent arteriole II. Vasa recta, peritubular capillaries glomerulus, all have blood III. Cortical nephrons have highly reduced vasa recta IV. Vasa recta runs parallel to the Henle’s loop in the juxta-medullary nephron

Juxtaglomerular apparatus is made up of

Which one of the following body functions is not performed by kidneys

Proximal convoluted tubule PCT is lined with

The part of a nephron which opens into the collecting duct is/are

Consider the following statements A. Flame cells are excretory structures in flatworms B. Green glands are excretory organs in annelids C. Columns of Bertini are the conical projections of renal pelvis into renal medulla between the renal pyramids

Which segment of renal tubule is permeable to water but nearly impermeable to salts

Water reabsorption in the distal parts of kidney tubules is regulated by

Loop of Henle is meant for absorption of Or What is removed from the filtrate at loop of Henle

The glomerular capillary blood pressure causes filtration of blood through three layers in a sequence of

On an average, _____ml of blood is filtered by the kidneys per minute which constitute roughly ______ of the blood pumped out by each ventricle of the heart in a minute

The substance which is completely reabsorbed from the filtrate in the renal tubule under normal conditions is

The vessel leading blood (containing nitrogenous waste) into the Bowman's capsule is known as

Volume of urine is regulated by

In micturition

Vasopressin stimulates reabsorption of water and reduction of urine secretion. Hence vasopressin is otherwise called

Which one of the following is not a part of a renal pyramid

We can produce concentrated/dilute urine. This is facilitated by a special mechanism. Identify the mechanism

Dialyzing unit (artificial kidney) contains a fluid which is almost same as plasma except that it has

The correct order of processes that occur in urine formation

Which one of the four parts mentioned below does not constitute a part of a single uriniferous tubule

Podocytes are the cells, present in

JG cells, under low glomerular blood flow, release

The average quantity of urea excreted in urine by man per day is

The urine is

Which one of following correctly explains the function of a specific part of a human nephron

Match the entries in column I with those in column II and choose the correct answer from the following

A fall in glomerular filtration rate (GFR) activates

Match the excretory functions of section I with the parts or the excretory system in section II. Choose the correct combinations from among the answers given.

In a healthy individual, GFR is about ______/min, the volume of the filtrate per day is ______ liter, and amount of micturition per day is ______ liter

Human urine is usually acidic because

Which of the following function is performed by collecting tubule of kidney

Match the terms given in Column I with their physiological processes given in Column II and choose the correct answer Column I A. Proximal convoluted tubule B. Distal convoluted tubule C. Henle's loop D. Counter-current mechanism E. Renal corpuscle Column II i. Formation of concentrated urine ii. Filtration of blood iii. Reabsorption of 70-80% of electrolytes iv. Ionic balance v. Maintenance of concentration gradient in medulla

Match the abnormal conditions given in Column A with their

What will happen if the stretch receptors of the urinary bladder wall are totally removed

What will happen if one kidney of a person is removed

If Henle's loop were absent from mammalian nephron, which of the following is to be expected Or Removal of proximal convoluted tubule from the nephron will result in

The outline of principal event of urination is given below in unorder manner I. Stretch receptors on the wall of urinary bladder send signal to the CNS II. The bladder fills with urine and becomes distended III. Micturition IV. CNS passes on motor messages to initiate the contraction of smooth muscles of bladder and simultaneous relaxation of urethral sphincter. The correct order of steps for urination is