Related Experiment Video

Updated: Mar 19, 2026

Author Spotlight: Experiential Tool for Teaching Active Transport Using Ex Vivo Histidine Uptake
04:40

Author Spotlight: Experiential Tool for Teaching Active Transport Using Ex Vivo Histidine Uptake

Published on: October 4, 2024

2.8K

Urea turnover and transfer to the digestive tract in the rabbit

S J Forsythe, D S Parker

    The British Journal of Nutrition
    |January 1, 1985
    PubMed

    More Related Videos

    Evaluation of Amino Acid Consumption in Cultured Bone Cells and Isolated Bone Shafts06:32

    Evaluation of Amino Acid Consumption in Cultured Bone Cells and Isolated Bone Shafts

    Published on: April 13, 2022

    2.2K
    An Experimental Model of Diet-Induced Metabolic Syndrome in Rabbit: Methodological Considerations, Development, and Assessment10:31

    An Experimental Model of Diet-Induced Metabolic Syndrome in Rabbit: Methodological Considerations, Development, and Assessment

    Published on: April 20, 2018

    11.3K

    Related Concept Videos

    Urea Cycle01:23

    Urea Cycle

    The urea cycle describes how liver cells convert ammonia to urea. Ammonia is a toxic waste product of protein catabolism. Land animals must convert ammonia into the less toxic urea which can be safely eliminated by the kidneys through urine. Marine animals excrete ammonia directly, and the surrounding water dilutes the ammonia to safe levels.
    51.7K
    Renal Drug Excretion: Tubular Secretion01:28

    Renal Drug Excretion: Tubular Secretion

    Active tubular secretion is a robust, energy-demanding process that utilizes carrier systems to transport drugs into renal tubules. The active renal secretion systems include the organic anion transporter (OAT) for weak acids and the organic cation transporter (OCT) for weak bases. Structurally similar drugs can compete for the same transporter, potentially leading to drug accumulation and toxicity. However, this principle can be exploited therapeutically. One example is probenecid (Probalan),...
    1.1K
    Comparative Excretory Systems02:24

    Comparative Excretory Systems

    Animals have evolved different strategies for excretion, the removal of waste from the body. Most waste must be dissolved in water to be excreted, so an animal’s excretory strategy directly affects its water balance.
    26.9K
    Drug Elimination by Renal Route: Tubular Secretion01:15

    Drug Elimination by Renal Route: Tubular Secretion

    Once the process of glomerular filtration is completed, blood carrying unfiltered drug molecules traverses through efferent arterioles and makes its way into the peritubular capillaries in the proximal tubule. A variety of carriers play a pivotal role in actively secreting drugs from these peritubular capillaries into the tubular fluid. The organic anion transporter transfers acidic drugs, against an electrochemical gradient, from the peritubular capillaries into the renal tubule cells and...
    3.7K
    Filtration and Urine Formation01:32

    Filtration and Urine Formation

    The function of the kidneys is to filter, reabsorb, secrete, and excrete. Every day the kidneys filter nearly 180 liters of blood, initially removing water and solutes but ultimately returning nearly all filtrates into circulation with the help of osmoregulatory hormones. This process removes wastes and toxins but is also crucial to maintain water and electrolyte levels. Most of these functions are performed by the tiny but numerous nephrons contained within the kidneys.
    54.5K
    Renal Drug Excretion: Tubular Reabsorption01:25

    Renal Drug Excretion: Tubular Reabsorption

    Tubular reabsorption, a process occurring post-glomerular filtration of drugs in the renal tubule, is a critical determinant of drug half-life. During the process of renal excretion, as the glomerular filtrate progresses to the distal convoluted tubule (DCT), drugs that are highly permeable, lipophilic, and nonionized undergo passive reabsorption from the tubular fluid into the surrounding peritubular capillaries. This reabsorption process restricts their elimination through the kidneys. This...
    1.0K