Practice free Excretory Products and Their Elimination (Zoology) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Angiotensinogen is a protein produced and secreted by:
Angiotensinogen is a plasma protein produced and secreted by the liver cells. It is the precursor of angiotensin I, which is further converted to angiotensin II, a potent vasoconstrictor involved in the regulation of blood pressure and fluid balance in the body.
Which of the following are uricotelic animals?
(c) : Uricotelic animals ( living in dry conditions) are those animals which excrete uric acid as their
excretory product e.g lizard and crow. These animals conserve water in their bodies and synthesize crystals of uric acid from ammonia. These crystals can be retained in the body (in solid form ) for a considerable time before being discharged from the body.
A person passes much urine and drinks much water but his blood glucose level is normal. This condition may be the result of:
(b) Vasopressin or ADH secreted from posterior pituitary stimulates reabsorption of water by the distal convoluted tubule and the collecting renal tubules and thus regulates urine volume. It has no such important effect on glucose metabolism. Therefore, a person whose blood glucose level is normal, but passes much urine and drinks much water has a reduction in vasopressin secretion which ultimately leads to diabetes insipidus.
Which one of the following is correct regarding the excretion?
(b) In descending limb of loop of Henle, the water is reabsorbed from filtrate flowing in it due to increasing osmolarity of interstitial fluid. Sodium and other solutes are not reabsorbed here. The filtrate becomes hypertonic to blood plasma. All nephrons have their renal Malpighian corpuscles in the cortex. Cortical nephrons have their loop of Henle in the renal medulla near its junction with the renal cortex, while the loop of Henle of juxtamedullary nephrons is located deep in the renal medulla; they are called juxtamedullary because their renal corpuscle is located near the medulla (but still in the cortex).
Which of the following is true for excretion in humans?
(c) Glucose and amino acids are reabsorbed in PCT by secondary active transport. Water, sodium and chloride ions are reabsorbed in DCT. It is permeable to water. Maximum reabsorption takes place within the PCT. Humans are ureotelic and excrete out 25-30 gm of urea per day.
Which part of the nephrons is impermeable to water?
(c) : Ascending limb of loop of Henle is impermeable to water. It does not reabsorb water rather sodium, potessium, magnesium and chloride are reabsorbed and therefore the filtrate becomes hypotonic to blood plasma.
Which of the following process of urine formation takes place all along the renal tubule and collecting duct?
(c) Tubular reabsorption and tubular secretion takes place all along the renal tubule and collecting duct while ultrafiltration takes place in renal corpuscle. Anti-current mechanism helps in concentration of urine.
Hypothalamus is stimulated by osmoreceptors and make the neurohypophysis to release
NCERT page number 297
19.5 Regulation of Kidney Function
Excretory Products And Their Elimination
ADH has no effects over
NCERT page number 297
19.5 Regulation of Kidney Function
Excretory Products And Their Elimination
ADH cannot cause
NCERT page number 297
19.5 Regulation of Kidney Function
Excretory Products And Their Elimination
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