Exam: GRE (Verbal)

Definition: A type of pigment that is a derivative of protoporphyrins, often found in biological systems and used in various medical applications.

Example: Hematoporphyrin is used in photodynamic therapy to treat certain types of cancer.

Definition: A chemical compound derived from logwood, used primarily as a dye or stain in biological and histological applications.

Example: The laboratory technician used hematoxylin to stain the tissue samples for examination under the microscope.

Definition: The presence of blood in the urine.

Example: The doctor diagnosed her with hematuria after she noticed blood in her urine.

Definition: A red, iron-containing compound found in hemoglobin and myoglobin that helps transport oxygen in the blood.

Example: Heme is essential for the function of hemoglobin in carrying oxygen throughout the body.

Definition: A type of protein that contains iron and helps some marine animals transport oxygen in their blood.

Example: Hemerythrin is important for the oxygen transport in certain marine invertebrates.

Definition: A type of chemical compound that has a specific structure with a hydroxyl group and an alkyl group, often formed during the process of making acetals from aldehydes or ketones.

Example: In organic chemistry, a hemiacetal can be formed when an aldehyde reacts with an alcohol.

Definition: Relating to the blood or the circulation of blood.

Example: The doctor explained that hemic conditions can affect overall health.

Definition: A type of carbohydrate found in plant cell walls that is less complex than cellulose and can be broken down into simpler sugars.

Example: Hemicellulose plays an important role in the structure of plant cell walls.

Definition: Relating to a group of marine animals that are part of the phylum Hemichordata, which includes acorn worms and pterobranchs.

Example: The hemichordate species found in the ocean exhibit unique characteristics that distinguish them from other marine life.

Definition: A type of marine animal that is similar to a worm and belongs to the phylum Hemichordata, characterized by having a simple backbone structure and gill slits.

Example: The hemichordate is an interesting creature that helps scientists understand the evolution of chordates.

Definition: Describing a crystal that has only half of the faces needed for full symmetry.

Example: The hemihedral crystal structure gives the mineral a unique appearance.