1995年2月1日 · Animals excrete three main nitrogen products, ammonia, urea and uric acid (Fig. 1), as well as some minor nitrogen excretory products, including trimethylamine oxide, guanine, creatine, creatinine and amino acids.

Nitrogenous excretion is the removal of nitrogenous waste substances of metabolism. Nitrogenous waste substances During protein catabolism (breakdown) amino acids are deaminated to form a keto-acid and ammonia .

2024年5月13日 · Clinical blood urea concentrations are expressed as Blood Urea Nitrogen (BUN) which range from 7 to 20 mg/dL N, which is equivalent to 2.5 to 7.1 mM urea. Serum levels depend predominately on the balance between urea …

2021年4月23日 · Animals require pathways for nitrogen excretion that minimizes toxicity in the body. If not reused for the synthesis of new amino acids or other nitrogenous products, amino groups are channeled into a single excretory end product. The end product can either be ammonia, urea or uric acid.

• Most nitrogenous wastes in fish are produced and excreted as ammonia or urea. Animals that excrete their nitrogenous wastes primarily as ammonia (NH 3) are ammoniotelic. About 80 to 90% of their nitrogenous wastes are excreted as ammonia and the remainder as urea. What is Ammonia (NH3)? 4 +.

2024年11月23日 · During the catabolism, or breakdown, of nitrogen-containing macromolecules, carbon, hydrogen, and oxygen are extracted and stored in the form of carbohydrates and fats. Excess nitrogen is excreted from the body. Nitrogenous wastes tend to form toxic ammonia, which raises the pH of body fluids.

2015年8月7日 · This review covers aspects of protein metabolism and the control of the two major molecules involved in renal nitrogen excretion: urea and ammonia. Both urea and ammonia transport can be altered by glucocorticoids and hypokalemia, two conditions that also affect protein metabolism.

2024年11月23日 · Urea is a colorless, odorless solid, highly soluble in water, and practically non-toxic. Dissolved in water, it is neither acidic nor alkaline. The body uses it in many processes, the most notable one being nitrogen excretion. Urea is widely used in fertilizers as a convenient source of nitrogen.

The two major components of renal nitrogen excretion, urea and ammonia, are regulated by a wide variety of conditions and play important roles in normal health and disease, including roles in the urine concentrating mechanism and in acid-base homeostasis.

There are diverse physiological functions of nitrogen end products in different animal groups, including excretion, acid-base regulation, osmoregulation and buoyancy. Animals excrete a variety of nitrogen waste products, but ammonia, urea and uric acid predominate.