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H - Glossary Terms
All of the 'H' terms for the end of year test for Project Lead the Way Principles of Biomedical Science
13
Medical
11th Grade
04/29/2010

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Term
Helix
Definition
Something in spiral form.
Term
Hemoglobin
Definition
An iron-containing protein found in red blood cells that reversibly binds ozygen. It functions in the transport of oxygen.
Term
Heredity
Definition
The transmission of triats from ancestor to descendant.
Term
Heterozygous
Definition
Having two different alleles for a given gene.
Term
HDL: High Density Lipoprotein
Definition
A cholesterol-carrying particle in the blood, made up of cholesterol and other lipids surrounded by a single layer of phospholipids in which proteins are embedded. An HDL particle carries less cholesterol than a related lipoprotein, LDL, and may be correlated with a decreased risk of blood vessel blockage.
Term
Histology
Definition
The branch of anatomy that deals with the minute detail of animal and plant tissues discernable with the microscope.
Term
Histone
Definition
A small protein with a high proportion of a positively charged amino acids that binds to the negatively charged DNA and plays a key role in its chromatin structure.
Term
Homeostasis
Definition
The steady-state physiological condition of the body.
Term
Homozygous
Definition
Having two identical alleles for a given gene.
Term
Hormone
Definition
A product of living cells that circulates in body fluids (as blood) and produces a specific often stimulatory effect on the activity of cells usually remote from its point of origin.
Term
Host Cell
Definition
Cell on or in which smaller organisms or viruses live, feed, and reproduce.
Term
Hydrogen Bond
Definition
A type of weak chemical bond formed when the slightly positive hydroen atom of a polar covalent bond in one molecule is attracted to the slightly negative atom of a polar covalent atom in another molecule.
Term
Hydroxyl Group
Definition
A functional group consisting of a hydrogen atom joined to an o
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