Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Feedback Loops

Feedback Loops

In most cases, excessive hormone production is prevented by negative feedback—a loop that starts with a stimulus inducing the release of a particular substance, like a hormone, to maintain a certain level before triggering a signal that results in a decrease in further release of the hormone.

Feedback Inhibition

Feedback Inhibition

Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!

Review and Preview

Review and Preview

Data are individual items of information obtained from a population or sample. Data may be classified as qualitative (categorical), quantitative continuous, or quantitative discrete. Because it is not practical to measure the entire population in a study, researchers use samples to represent the population. A random sample is a representative group from the population chosen by using a method that gives each individual in the population an equal chance of being included in the sample. Random...

Review and Preview

Review and Preview

In statistics, several tools are used to interpret the data. Measures of central tendency represent the characteristics of the data, such as mean, median, and mode. Additionally, measures of variance like standard deviation and range are used to find the spread of data from the mean. Relative standing measures the distance between data locations. Commonly used measures of relative standings are percentile, z score, and quartiles.
Percentiles are a type of fractile that partition data into...

Allergic Reactions

Allergic Reactions

Reaction Rate

Reaction Rate

The rate of reaction is the change in the amount of a reactant or product per unit time. Reaction rates are therefore determined by measuring the time dependence of some property that can be related to reactant or product amounts. Rates of reactions that consume or produce gaseous substances, for example, are conveniently determined by measuring changes in volume or pressure.
The mathematical representation of the change in the concentration of reactants and products, over time, is the rate...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Urolithiasis in patients with cancer.

Nature reviews. Urology·2026

Same author

Leveraging Natural Language Processing to Evaluate the Evolution of Subcapsular Renal Hematomas: Report of a 10-Year Retrospective Multi-Institution Study.

Journal of endourology·2026

Same author

Kidney Stones Associated with Urinary Tract Infection: Striving Toward Standardized Terminology.

The Journal of urology·2026

Same author

Evaluation of the National Accreditation Program for Rectal Cancer and Association with Oncologic Outcomes After Proctectomy.

Journal of the American College of Surgeons·2026

Same author

Correction: Who still needs multiple access sites in the era of ECIRS and US-guided supine PCNL?

World journal of urology·2026

Same author

Personalizing BPH Management: Bladder Stone Removal Alone vs. With Concomitant Laser Enucleation-A Multicenter Perspective With Patient Reported Outcomes and Decisional Regret Analysis.

The Prostate·2026

Same journal

Preventing Postpartum Pelvic Floor Dysfunction: Clinical Evidence and Policy Gaps in U.S. Coverage of Pelvic Floor Muscle Therapy.

Urology·2026

Same journal

Editorial Comment on "Through the Eyes of the Applicant: A Qualitative Study of the Urology Residency Match".

Urology·2026

Same journal

Editorial Comment on "A Histopathologic Assessment of Prostate Ductal Anatomy in Relation to Micro-Ultrasound".

Urology·2026

Same journal

Same-Day Discharge Following Multiport Robot-Assisted Simple Prostatectomy: A Prospective Feasibility Study of Outcomes, Costs, and Post-Discharge Healthcare Utilization.

Urology·2026

Same journal

Extended versus Standard Lymph Node Dissection at the Time of Radical Cystectomy for Bladder Cancer.

Urology·2026

Same journal

Intractable Epistaxis and Severe Hypertension in a Young Woman.

Urology·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Oct 26, 2025

Author Spotlight: Exploring Light-Driven Chemical Reactions and Energy-Harnessing Devices in Photochemical Research

Author Spotlight: Exploring Light-Driven Chemical Reactions and Energy-Harnessing Devices in Photochemical Research

Published on: February 16, 2024

AUTHOR REPLY

Johnathan A Khusid¹, Mantu Gupta¹, Areeba S Sadiq¹

¹Department of Urology, Icahn School of Medicine at Mount Sinai, New York, NY.

|July 27, 2021

Summary

No abstract available in PubMed .

More Related Videos

Author Spotlight: Enhancing Coronary Artery Revascularization

Author Spotlight: Enhancing Coronary Artery Revascularization

Published on: September 15, 2023

Layers of Symbiosis - Visualizing the Termite Hindgut Microbial Community

Layers of Symbiosis - Visualizing the Termite Hindgut Microbial Community

Published on: May 28, 2007

Related Experiment Videos

Last Updated: Oct 26, 2025

Author Spotlight: Exploring Light-Driven Chemical Reactions and Energy-Harnessing Devices in Photochemical Research

Author Spotlight: Exploring Light-Driven Chemical Reactions and Energy-Harnessing Devices in Photochemical Research

Published on: February 16, 2024

Author Spotlight: Enhancing Coronary Artery Revascularization

Author Spotlight: Enhancing Coronary Artery Revascularization

Published on: September 15, 2023

Layers of Symbiosis - Visualizing the Termite Hindgut Microbial Community

Layers of Symbiosis - Visualizing the Termite Hindgut Microbial Community

Published on: May 28, 2007