lactase
Losing it after childhood is the normal human pattern; keeping it into adulthood is the genetic exception that spread with dairy farming.
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Losing it after childhood is the normal human pattern; keeping it into adulthood is the genetic exception that spread with dairy farming.
Read definitionLaryngitis causes hoarseness or voice loss when the vocal folds swell, most often from a viral infection, overuse, or irritant exposure.
Read definitionA laryngoscope is a lighted instrument used to view the larynx, most often to guide placement of a breathing tube.
Read definitionA condition in which the cells of the uterine cervix are slightly abnormal.
Read definitionCancer that has traveled to the lung from somewhere else, keeping the identity of the organ it started in.
Read definitionLong duration is the whole point of this anesthetic, and the same property explains why it is handled with more caution than its relatives.
Read definitionThe earliest recognized stage of melanoma, still trapped in the outer skin layer where no blood or lymph vessels reach.
Read definitionMesenchymal describes embryonic connective tissue and the cells derived from it that can develop into bone, cartilage, fat, and blood related tissue.
Read definitionSpeed in and speed out is the point: it suits a procedure that lasts minutes, not a symptom that lasts months.
Read definitionA substance being studied as a treatment for atherosclerosis (a build-up of fat in the arteries).
Read definitionA substance found on certain epithelial cells (cells that cover organs, glands, and other body surfaces) and on breast cells involved in making milk.
Read definitionMucosa is the moist membrane lining internal passages and cavities such as the mouth, gut, and airways, often producing protective mucus.
Read definitionMucus is a viscous, protective fluid that coats and moistens internal surfaces, trapping particles and helping shield the tissue beneath it.
Read definitionPain with no injury underneath it, which is why ordinary painkillers disappoint and drugs built for epilepsy and depression do not.
Read definitionAbnormal cells are found in the lower part of the epidermis (the outer layer of the skin).
Read definitionHaving to do with skin cancer that forms in the lower part of the epidermis (the outer layer of the skin) or in squamous cells, but not in melanocytes (skin cells that make pigment).
Read definitionA chemical made by some nerve cells and in the adrenal gland.
Read definitionKeeping DNA behind a membrane is what separates human cells from bacteria, and it lets the cell control which genes are read.
Read definitionOlfaction is the sensory process that detects airborne chemical molecules in the nose and interprets them as distinct smells.
Read definitionOlfactory describes the structures and nerve pathways responsible for detecting and processing smell, from the nasal lining to the brain.
Read definitionFor learning, not diagnosis. This glossary provides general educational information and is not a substitute for advice from a qualified healthcare professional. If you may be experiencing a medical emergency, contact local emergency services.