Category: H

A form of degeneration in which the tissues assume a homogeneous, glassy appearance. It is caused by hyaline deposits replacing musculoelastic elements of blood vessels with a firm, transparent substance that causes loss of elasticity. It is responsible for hardening of the arteries and is often followed by calcification or deposit of lime salts in…

Loss of nerve and supporting cells of the brain from multiple episodes of hepatic encephalopathy or coma. This condition may be caused by Wilson’s disease or other insults to the liver (e.g., hepatic coma produced by alcoholic, drug-induced, or viral hepatitis).  

Horizontal sharp grooving in a band across the tip of the nailbed. It is caused by biting or picking the proximal nail fold of the thumb with the index fingernail.  

A chemical change in substances due to addition of a molecule of water.  

Inability to hear high-frequency sounds (e.g., sound frequencies just below 20 kHz).  

Hearing loss passed down through generations of a family.  

A culture accomplished by inoculating the bacterium into a drop of culture medium on a cover glass and mounting it upside down over the depression on a concave slide.  

A thin slice of agar seeded on its surface with bacteria and then inverted on a coverslip and sealed in the concavity of a hollow glass slide.  

A metallic cough occurring in laryngitis.  

An autosomal dominant error in the synthesis of heme in which an excess amount of coproporphyrin is excreted in the feces.