Table of Contents
- 1 What organ removes excess water from food?
- 2 What organs help maintain water balance?
- 3 How does your body absorb water?
- 4 How is waste excreted from the body?
- 5 Which organ has primary control over the amount of water in the body?
- 6 Why is the removal of water from the body an example of homeostasis?
- 7 How do kidneys absorb water?
- 8 What is posterior pituitary?
What organ removes excess water from food?
Kidneys. The paired kidneys are often considered the main organs of excretion. The primary function of the kidneys is the elimination of excess water and wastes from the bloodstream by the production of the liquid waste known as urine.
What organs help maintain water balance?
Body fluids are mainly water and electrolytes, and the three main organs that regulate fluid balance are the brain, the adrenal glands and the kidneys (Tortora and Grabowski, 2002).
How does your body absorb water?
The water we drink is absorbed by the intestines, and circulated throughout the body in the form of body fluids such as blood. These perform various functions that keep us alive. They deliver oxygen and nutrients to the cells, and take away waste materials, which are then eliminated with urination.
What hormone is responsible for water absorption by the kidneys?
Water absorption in the kidney is controlled by the hormone vasopressin which is a peptide very similar in structure to oxytocin (cf. Chapter 17). Vasopressin causes greatly enhanced water absorption by the kidney and is sometimes known as the ‘antidiuretic hormone’ (ADH).
What is excreted by the liver?
– Liver excretes bilirubin which is a by-product of hemoglobin catabolism. – Bile gets excreted in the small intestine and excreted in the form of faeces by the large intestine.
How is waste excreted from the body?
This is the job of the excretory system. You remove waste as a gas (carbon dioxide), as a liquid (urine and sweat), and as a solid. Excretion is the process of removing wastes and excess water from the body. Recall that carbon dioxide travels through the blood and is transferred to the lungs where it is exhaled.
Which organ has primary control over the amount of water in the body?
Kidneys
Kidneys have primary control over the amount of water in the body.
Why is the removal of water from the body an example of homeostasis?
Water content Water levels and mineral ions in the blood are controlled to keep the concentrations the same inside the cells as around them. This protects cells by stopping too much water from entering or leaving them by osmosis. If body cells lose or gain too much water, they do not function efficiently.
In which part of the body is water absorbed?
the small intestine
Ingested water is absorbed mainly in the small intestine. It appears in the blood as soon as 5 minutes after ingestion. The body water pool is renewed at a rate depending on the quantity of ingested water.
Where does most of water absorption happen?
small intestine
Absorption of ingested water and most solutes occurs in the proximal small intestine, therefore the rate at which beverages are emptied from the stomach is an important factor in determining the rate of water absorption.
How do kidneys absorb water?
Tubular Reabsorption and Secretion Water reabsorption is by osmosis through water channels in the membrane. These water channels consist of a family of proteins called aquaporin. At least seven different aquaporin isoforms are expressed in the kidney.
What is posterior pituitary?
The posterior pituitary (or neurohypophysis) is the posterior lobe of the pituitary gland which is part of the endocrine system. The posterior pituitary is not glandular as is the anterior pituitary.