Practice free Excretory Products and Their Elimination (Zoology) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
What is the nature of the urine formed in terms of color and fluidity?
The NCERT describes urine as 'a light yellow coloured watery fluid'.
The neural mechanisms causing micturition are collectively called:
The NCERT text states, 'The process of release of urine is called micturition and the neural mechanisms causing it is called the micturition reflex.'
Which of the following components of sweat is directly mentioned as an excretory waste product?
The NCERT states, 'Sweat produced by the sweat glands is a watery fluid containing NaCl, small amounts of urea, lactic acid, etc.' It further clarifies that sweat 'helps in the removal of some of the wastes mentioned above.'
The substances like bilirubin and biliverdin, secreted by the liver, ultimately pass out along with:
The NCERT states, 'Liver, the largest gland in our body, secretes bile-containing substances like bilirubin, biliverdin... Most of these substances ultimately pass out alongwith digestive wastes.'
Which of the following describes the initial process of urine formation in the nephron?
The text states, 'Urine formation involves three main processes, i.e., filtration, reabsorption and secretion. Filtration is a non-selective process performed by the glomerulus using the glomerular capillary blood pressure.'
The Malpighian corpuscle (renal corpuscle) is structurally composed of which two parts?
According to the NCERT text, 'The Bowman’s capsule encloses the glomerulus to form Malpighian or renal corpuscle.'
Which of the following statements about glomerular filtration is correct?
The text explicitly states, 'Filtration is a non-selective process performed by the glomerulus using the glomerular capillary blood pressure.'
The filtrate formed in Bowman's capsule is largely similar in composition to blood plasma, with the key exception of which component?
Although not directly stated in this excerpt for 'filtration', the comparison to dialysis and common knowledge implies that proteins, due to their large size, are generally not filtered. The text 'Protein-free fluid is filtered from blood plasma into the Bowman’s capsule' from the exercises implicitly supports this.
Which structure in the nephron is a tuft of capillaries responsible for blood filtration?
The text states, 'Glomerulus is a tuft of capillaries formed from afferent arterioles, fine branches of renal artery.'
What is the primary role of the juxta glomerular apparatus (JGA)?
The text says, 'JGA is a special sensitive region formed by cellular modifications in the distal convoluted tubule and the afferent arteriole at the location of their contact. A fall in GFR can activate the JG cells to release renin which can stimulate the glomerular blood flow and thereby the GFR back to normal,' highlighting its role in GFR regulation.
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.