Atrial Natriuretic Factor & Heart — NEET Biology
✅ Asked in NEET 2024Now you know about the endocrine glands and their hormones. However, as mentioned earlier, hormones are also secreted by some tissues which are not endocrine glands. For example, the atrial wall of our heart secretes a very important peptide hormone called atrial natriuretic factor (ANF), which decreases blood pressure. When blood pressure is increased, ANF is secreted which causes dilation of the blood vessels. This reduces the blood pressure.
ANF is a peptide hormone secreted by the atrial wall of the heart to regulate blood pressure by causing blood vessel dilation. NTA tests whether students know that ANF comes from the heart's atrial tissue, not from other endocrine glands or non-endocrine tissues like seminiferous tubules. A common trap is confusing ANF-secreting cells with other hormone-producing tissues. Remember: ANF = atrial wall → decreases blood pressure → causes vasodilation. This concept appears in coordination and integration chapters and is often tested alongside other hormones from non-traditional sources.
Identify the wrong statements: A. Erythropoietin is produced by juxtaglomerular cells of the kidney B. Leydig cells produce androgens C. Atrial natriuretic factor is secreted by seminiferous tubules of testes D. Cholecystokinin is produced by the gastrointestinal tract E. Gastrin acts on intestinal wall and helps in production of pepsinogen (NEET 2024)
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