The 'Hormone Atrial Natriuretic Peptide' (ANP) is secreted by the heart in response to high blood pressure and primarily acts to: MCQ with Answer and Explanation

Explanation:
The Munch hypothesis, or mass flow hypothesis, explains the translocation of organic solutes (primarily sucrose) through the phloem. It proposes that the movement is driven by a turgor pressure gradient between the source (where sugars are loaded into the phloem, increasing osmotic pressure) and the sink (where sugars are unloaded, decreasing osmotic pressure). Water flows from xylem to phloem and back, driving the bulk flow.

Explanation:
Under normal conditions, the brain relies almost exclusively on glucose for energy. During prolonged fasting, it can adapt to use ketone bodies. Fatty acids cannot cross the blood-brain barrier.

Explanation:
James Watson and Francis Crick, using Rosalind Franklin's X-ray data, proposed the double helical structure of DNA in 1953.