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Referring to the circulatory system of vertebrates, including Osteichthyes, which statement is accurate?
The NCERT states that vertebrates 'have a ventral muscular heart.' This distinguishes them from non-chordates where the heart, if present, is dorsal.
Which of the following hormones is a peptide hormone secreted by the atrial wall of the heart and plays a role in reducing blood pressure?
As per the NCERT text, 'the atrial wall of our heart secretes a very important peptide hormone called atrial natriuretic factor (ANF), which decreases blood pressure.'
An individual experiences an increase in blood pressure. Which of the following responses would most likely occur to counteract this increase?
The NCERT states, 'When blood pressure is increased, ANF is secreted which causes dilation of the blood vessels. This reduces the blood pressure.' ANF directly lowers blood pressure.
The juxtaglomerular cells of the kidney are responsible for producing a peptide hormone that stimulates the formation of red blood cells. What is this hormone?
According to the NCERT, 'The juxtaglomerular cells of kidney produce a peptide hormone called erythropoietin which stimulates erythropoiesis (formation of RBC).'
Which of the following gastrointestinal hormones primarily acts on gastric glands to stimulate the secretion of hydrochloric acid and pepsinogen?
The NCERT excerpt states, 'Gastrin acts on the gastric glands and stimulates the secretion of hydrochloric acid and pepsinogen.'
A patient is struggling with a condition where their body is not producing enough red blood cells. Which hormone, if deficient, could be contributing to this issue?
Erythropoietin stimulates erythropoiesis (formation of RBC) as mentioned in the NCERT text. A deficiency would lead to reduced RBC formation.
Which hormone stimulates the secretion of water and bicarbonate ions from the exocrine pancreas?
The NCERT states, 'Secretin acts on the exocrine pancreas and stimulates secretion of water and bicarbonate ions.'
Cholecystokinin (CCK) has a dual action, targeting both the pancreas and the gall bladder. What specific secretions does it stimulate from these organs, respectively?
As per the NCERT text, 'CCK acts on both pancreas and gall bladder and stimulates the secretion of pancreatic enzymes and bile juice, respectively.'
Which of the following peptide hormones, secreted by the gastrointestinal tract, is known to inhibit gastric secretion and motility?
The NCERT clearly states, 'GIP inhibits gastric secretion and motility.'
A hormonal feedback mechanism involving the hypothalamus, JGA, and heart plays a role in regulating kidney function. An increase in blood flow to the atria of the heart can cause the release of which hormone?
The NCERT in the section 'Regulation of Kidney Function' mentions, 'An increase in blood flow to the atria of the heart can cause the release' of Atrial Natriuretic Factor (ANF), which subsequently lowers blood pressure.
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.