Impotence
(Science: urology) The inability to achieve or sustain a penile erection.
Dictionary > Impotence
You will also like...

Protein Activity and Cellular Metabolism
Proteins have a crucial role in various biological activities. Get to know how proteins are able to perform as enzymes, ..

Homeostatic Mechanisms and Cellular Communication
Homeostasis is the relatively stable conditions of the internal environment that result from compensatory regulatory res..

Freshwater Community Energy Relationships – Producers & Consumers
This tutorial looks at the relationship between organisms. It also explores how energy is passed on in the food chain an..

The Dinosaurs
Dinosaurs represented a major turn in the evolutionary development of organisms on Earth. The first dinosaurs were presu..

Neural Control Mechanisms
Neurons generate electric signals that they pass along to the other neurons or target tissues. In this tutorial, you wil..

Meiosis and Alternation of Generations
Plants are characterized by having alternation of generations in their life cycles. This tutorial is a review of plant m..