Admin Table of Contents
- 1 Where do the collecting ducts empty into?
- 2 What is secreted in the collecting duct?
- 3 What substances are reabsorbed in collecting duct?
- 4 What is the function of the collecting duct in the nephron?
- 5 What is the name of the structure where all the nephrons finally empty their urine?
- 6 What does the cortical radiate vein drain into?
- 7 Where do the papillary ducts open in a mouse?
- 8 How many collecting ducts are in the kidney?
Where do the collecting ducts empty into?
renal pelvis
Collecting ducts descend through the cortex and medulla and successively fuse near the inner medullary region. Toward the papillary tip, converging papillary ducts form approximately 20 large ducts, which empty into the renal pelvis. The collecting ducts are composed of two cell types: principal and intercalated cells.
What is secreted in the collecting duct?
The alpha-intercalated cell of collecting duct is the main responsible for hydrogen secretion into the urine. The carbon dioxide, which is generated in the cells and enters from the blood, is changed to carbonic acid. This carbonic acid is divided into hydrogen ion and bicarbonate ion.
Where is the papillary duct?
The papillary ducts open at the tip of renal papilla into the renal pelvis. The renal pelvis is lined by transitional cell epithelium and its continuation forms the ureter. The mouse renal papilla may be very long and protrude into the initial portion of the ureter.
Where does urine go after the collecting duct?
From the collecting ducts, the urine progresses to the renal pelvis, a widened area of the kidney, and exits through the ureter. The urine passes through the ureters to the urinary bladder.
What substances are reabsorbed in collecting duct?
Learning Objectives
| Table 1. Substances Secreted or Reabsorbed in the Nephron and Their Locations | ||
|---|---|---|
| Substance | PCT | Collecting ducts |
| Potassium | 65 percent reabsorbed; diffusion | Secretion controlled by aldosterone; active |
| Calcium | Reabsorbed; diffusion | Reabsorbed if parathyroid hormone present; active |
| Magnesium | Reabsorbed; diffusion |
What is the function of the collecting duct in the nephron?
The last part of a long, twisting tube that collects urine from the nephrons (cellular structures in the kidney that filter blood and form urine) and moves it into the renal pelvis and ureters.
Where does blood go after the cortical radiate artery?
As blood moves from the cortical and medullary beds, it drains into a network of venules that converges into interlobular veins, the arcuate, interlobar, and then renal vein, which exits the kidney to drain into the inferior vena cava (Figure 2).
What is voiding of urine?
This results in incomplete relaxation or overactivity of the pelvic floor muscles during voiding (urination). Your urinary tract includes the organs that collect and store urine and release it from your body. They are the kidneys, ureters, bladder, and urethra.
What is the name of the structure where all the nephrons finally empty their urine?
renal collecting tubule, also called duct of Bellini, any of the long narrow tubes in the kidney that concentrate and transport urine from the nephrons, the chief functioning units of the kidneys, to larger ducts that connect with the renal calyces, cavities in which urine gathers until it flows through the renal …
What does the cortical radiate vein drain into?
Cortical Radiate Veins: These veins drain blood from the renal cortex (1) into the arcuate veins (5) then the interlobar veins (6), before it exits via the renal vein (10).
What is the arcuate vein?
The arcuate vein is a vessel of the renal circulation. It is located at the border of the renal cortex and renal medulla.
What is the function of the papillary collecting ducts?
Papillary ducts also contribute to water reabsorption and electrolyte balance. The cells that comprise the upper portion of papillary collecting ducts are similar to the cells found in the rest of the collecting system.
Where do the papillary ducts open in a mouse?
The papillary ducts open at the tip of renal papilla into the renal pelvis. The renal pelvis is lined by transitional cell epithelium and its continuation forms the ureter. The mouse renal papilla may be very long and protrude into the initial portion of the ureter.
How many collecting ducts are in the kidney?
Collecting ducts descend through the cortex and medulla and successively fuse near the inner medullary region. Toward the papillary tip, converging papillary ducts form approximately 20 large ducts, which empty into the renal pelvis. The collecting ducts are composed of two cell types: principal and intercalated cells.
What type of epithelium is found in the collecting duct system?
The epithelium is composed primarily of principal cells and α-intercalated cells. The simple columnar epithelium of the collecting duct system transitions into urothelium near the junction of a papillary duct and a minor calyx.