Asked by RichardBiology 🌱

How is urine produced in the kidneys and nephrons?

Profile picture

VERIFIED

Verified tutor tick

Emily Vause

Science teacher and Biology specialist. 5 years experience

First your blood is forced to enter the bowman’s capsule, where the high pressure forces all molecules that are small enough through the filter into the nephron. Molecules that go through are: water, ions, glucose, and urea. Molecules that do not go through are: red&white blood cells and proteins. In the proximal convoluted tubule all glucose is reabsorbed back into the capillaries by both diffusion and active transport. Then along the loop of henlé ions are reabsorbed according to blood concentration. Excess ions are left in the nephron for disposal. Then in the distal convoluted tubule and the collecting duct water is reabsorbed according to blood concentration and ADH levels. The higher the volume of water in your blood the less is reabsorbed and so will enter the ureter to go to the bladder. The filtrate leaving the nephron consists of water, urea, and excess ions.

Emily also answered

Asked in Biology 🌱

ASKED BY XXALDIDXX

BIOLOGY 🌱

What is photosynthesis?

Photosynthesis is a chemical reaction that happens in the leaves of a plant to food for it to survive. Photosynthesis takes place in the part of the...

ASKED BY ELLIE

BIOLOGY 🌱

Do the cells in an asexual reproduction divide by mitosis or meiosi?

They would divide by mitosis. Examples include budding, hydras, vegetative propagation and strawberries. ...

ASKED BY JESS

BIOLOGY 🌱

How do you work out the percentage of someone with blue eyes from a genetic diagram? (BB, BB, BB in a table?

If it’s just one characteristic the table is referred to as a monohybrid cross, so there should be four possible outcomes. For example if the parent...

ASKED BY ROSS

BIOLOGY 🌱

Why is it necessary men having more red blood cells per cubic millimeter of blood than women?

Hi, women have reproductive cyclefor every 30days so they loose RBC.Thus less RBC are found in female mammals...

ASKED BY JAKE

BIOLOGY 🌱

What is a eukaryote ?

A eukaryote is a cell (can also be a single cell organism) that has a membrane bound nucleus, organelles (little organs) and linear chromosomes (com...

ASKED BY FATMA

BIOLOGY 🌱

Where and how does pH affect carbohydrases?

Carbohydrases are enzymes that break down carbohydrates into smaller sugar molecules. They are usually made in the the pancreas and released into th...

ASKED BY FATMA

BIOLOGY 🌱

What happens to the fatty acids and glycerol once absorbed into the epithelium?

These two products of fat digestion, once absorbed by the epithelial cells of the small intestine, are re-formed and into triglycerides whilst insid...

ASKED BY PHOEBE-LILY

BIOLOGY 🌱

Why is eating a healthy, balanced diet so important to the body?

Eating a healthy, balanced diet is an important part of maintaining good health, and can help you feel your best. This means eating a wide variety o...

ASKED BY SOPHIE

BIOLOGY 🌱

What is Genetic Engineering?

Genetic engineering refers to direct manipulation process of the DNA to alter the characteristics of an organism (this can be of an animal, plant or...

ASKED BY YASHVI

BIOLOGY 🌱

Why are stem cells (from bone marrow) able to repair damaged heart tissue?

Stem cells are unspecialised cells that can differentiate and be used to repair various tissues, including heart one. When used in medical intervent...

Find me a tutor

We take your privacy seriously. View our policy.