Category: A

An acronym for Agency for Toxic Substances and Disease Registry, answer.  

A treatment for cataracts that involves washing the eye with atropine, which will permanently dilate the pupil of the eye. Administration of atropine until desired pharmacologic effect is achieved.  

The plant from which atropine is derived.  

In epidemiology, a person or group capable of experiencing the health factor being studied. The state of being subject to some uncertain event occurring which connotes loss or difficulty. In the financial sense, this refers to an individual, organization (like an HMO) or insurance company assuming the chance of loss—through running the risk of having…

In the heart, a small mass of special muscular fibers in the septum between the right atrium and the ventricle that forms the bundle of His which receives electrical impulses from the sinoatrial node of the node. A mass of conducting tissue in the right atrium of the heart, which continues as the atrioventricular bundle…

In biology, cells lacking flagella, generally used to refer to originally flagellated cells that have lost their flagella.  

An opening between the atria of the heart. A congenital condition in which a hole in the wall between the two atria of the heart allows blood to flow through the heart and lungs. Common congenital heart defect, characterized by an abnormal opening in the septum dividing the atria, which allows blood to pass from…

The heart chambers that receive oxygen-depleted (deoxygenated) blood. The auricles of the heart. The two diminutive upper chambers of the heart that receive blood from both the lungs and the body.  

The loss of tone or response in a muscle, atonicity. Lack of normal tone, usually of a muscle, muscle system, or the bladder, also: atonia, atonicity. A lack of tone or tension in the muscles. Inability to completely empty the urinary bladder; often associated with paralysis and diabetic neuropathy. Lacking normal tension; flaccid or relaxed.…

A lack of normal muscle tone, atony; atonia. State of being atonic or without tone.