These vessels marked by the white arrow1. are classified as 'cap bed 1' vessels in the renal portal system2. function to secrete glucose molecules across the wall of the proximal convoluted tubule3. move hydrogen ions across their endothelial cells into the lining cells of the proximal convoluted tubule for pH regulation (if the blood is in acidosis)4. secrete the products of drugs metabolism into the filtrate of the proximal convoluted tubulesChoose from the following:(A) 1 and 2(B) 2 and 3(C) 1 and 3(D) 1, 2, and 3(E) 3 only(F) 4 only(G) 1, 2, 3, and 4 The image is a colorful 3D model of a nephron, the basic structural and functional unit of the kidney. ### Description of the Diagram:- **Color-Coded Pathways:** - The **red structures** represent the blood vessels, specifically the afferent and efferent arterioles. - The **blue structures** could indicate veins or other parts of the vascular network associated with the nephron. - The **yellow segments** depict the renal tubule, part of the nephron where urine formation occurs. This includes the proximal tubule, loop of Henle, distal tubule, and collecting duct. - The **orange sections** likely illustrate other parts of the renal tubule, possibly the proximal convoluted tubule or other convoluted sections. - The **purple lines** might show pathways like nerve fibers or additional tubular pathways. - **Special Features:** - **Green circular structures** likely represent the glomeruli, where initial blood filtration occurs. - **Mesh-like purple/blue network** represents the capillaries of the glomerulus, a key filtration interface. - There is a **white arrow** pointing to a specific part of the structure, possibly highlighting a key junction or the site of filtration within the nephron.### Educational Focus:- This model provides a visual representation of blood filtration and urine formation in the kidney.- It highlights the relationship between blood vessels and renal tubular system.- Educators can use this model to illustrate kidney function, explain nephron structure, and discuss the processes of filtration, reabsorption, and secretion.Understanding these structures helps in learning about kidney physiology, disorders, and treatments.

Answers The arrow is showing the peritubular cappillariest these are the blood vessels. Which has a function of exchange of gases and waste product The main function of these capillaries is the reabsorption of glucose and important amino acids, minerals etc from the tubules. Waste products like ions, drugs, water etc are osmotically or through hydrostatic pressure is released into tubules. According to the question the correct answer would be Option G) which says : 1,2,3,4 1.are classified as 'cap bed 1' vessels in the renal portal system 2. function to secrete glucose molecules across the wall of the proximal convoluted tubule 3. move hydrogen ions across their endothelial cells into the lining cells of the proximal convoluted tubule for pH regulation (if the blood is in acidosis) 4. secrete the products of drugs metabolism into the filtrate of the proximal convoluted tubules