K

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K-Sounds

K-sounds, or Korotkoff Sounds, are heard during the measurement of systolic and diastolic blood pressures when the cuff pressure is at a certain level. The cause of the K-sounds is still debated, but they are believed to be caused by blood jetting through the partly blocked or closed artery when the cuff is inflated. They resemble tapping noises and, when heard, indicate the systolic pressure by the manometer connected to the cuff.

Karyotype

Karyotype is the chromosome characteristics of an individual or of a cell line, usually presented as a systematic array of metaphase chromosomes from a photomicrograph of a single cell nucleus arranged in pairs in descending order of size and according to the position of the centromere.

Kerley B Lines

Kerley B Lines (in radiology) are lines resembling interstitial infiltrate that appear on chest X-ray images and are associated with certain disease conditions; fine horizontal lines a few centimeters above the costophrenic angle in the chest X-ray.

Kidney

The kidney is the main organ of excretion and osmoregulation in vertebrates, through which nitrogenous waste material (principally urine), water, and ions, etc. are eliminated from the body. In humans there is a pair of kidneys situated in the abdomen, below the diaphragm, on the back.

Kidney stone

A kidney stone is a hard pebble-like mass commonly composed of calcium oxalate that forms within the kidney. Some kidney stones cause pain and must be removed from the body using surgery or ultrasound techniques.

Killifish

Fundulus heteroclitus, or the killifish, is a small shallow-water minnow common along the Atlantic coast. The egg of the killifish is tough and transparent which allows easy laboratory manipulation and observation of embryo development without undue stress on the developing embryo. Killifish embryos were first flown on the Apollo Soyuz mission to study the development of the vestibular system.

Kinematics

Kinematics is the study of motion and the forces required to produce it. This includes the different forces at work during the movement of a single part of the body, and more complex movements such as running and climbing.

Kinescope

Kinescope is a cathode-ray tube in a television receiver that translates the received signal into a picture on a luminescent screen.

Kinetic energy

Kinetic energy is energy associated with motion.

Kinetics

Kinetics is the study of acceleration, motion or rate of change.

Knizocyte

A knizocyte is a red blood cell that has a pinched-triconcavity appearance.

Knurled

Knurled means having small ridges on the edge or surface.

Korotkoff Sounds

Korotkoff Sounds or, K-sounds, are operated during the measurement of systolic and diastolic blood pressures when the cuff pressure is at a certain level. The cause of the K-sounds is still debated, but they are believed to be caused by blood jetting through the partly blocked or closed artery when the cuff is inflated. They resemble tapping noises and, when heard, indicate the systolic pressure by the manometer connected to the cuff.

Kringle

Kringle is a triple-looped, disulfide-linked protein domains, found in some serine proteases and other plasma proteins, including plasminogen (5 copies), tissue plasminogen activator (2 copies), thrombin (2 copies), hepatocyte growth factor (4 copies), apolipoprotein A (38 copies).