Turgor

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Related to skin turgor: Capillary refill

turgor

[′tər·gər]
(botany)
Distension of a plant cell wall and membrane by the fluid contents.

Turgor

 

the state of tension of cell membranes that is caused by the osmotic pressure of the intracellular fluid (P int), the osmotic pressure of the external solution (P ext), and the resilience of the cell membrane. In animal cells, except for the cells of some Coelenterata, this resilience is generally minimal. Most animal cells lack turgor and maintain their integrity only in isotonic or near-isotonic solutions; in these cells the difference between the P int and the P ext is less than 0.5–1.0 atm.

In living plant cells, the P int is always greater than the P ext, but the cell membrane does not rupture owing to the presence of a cellulose cell wall. The difference between the P int and the P ext in such plants as halophytes and fungi reaches 50–100 atm, but even then the cell wall’s reserve of strength amounts to 60–70 percent. In most plants the relative elongation of the cell membrane that results from turgor does not exceed 5–10 percent, and the turgor pressure is in the range of 5–10 atm. Turgor gives plant tissues resilience and strength. All stages of autolysis, fading, and aging are accompanied by a decline in turgor.

V. V. KABANOV

References in periodicals archive ?
Monitor and record the animal's vital signs, including heart rate, respiratory rate, CRT, mucous membrane color, skin turgor, and temperature.
c) Thirst, skin turgor and mucous membrane moisture
Aside from bruising, does the skin turgor appear normal?
3) If the baseline weight is not known, prolonged capillary refill time, abnormal skin turgor, and abnormal respiratory pattern are more reliable indicators of dehydration; other physical findings are less precise.
Rodgers examines toenails, skin turgor, dentition, and even body position for clues to body awareness and grooming.
Check skin turgor by pulling up the hair coat on the back of the neck.
The physical examination should focus on identifying signs of dehydration such as level of alertness, presence of sunken eyes, dry mucous membranes, and skin turgor.
4C; pulse rate 150bpm; respiration 40 breaths/min; and blood pressure 105/70mmHg such features as poor general appearance sunken eyeballs dryness of mucous membranes decreased skin turgor and abnormal respiratory pattern in acidotic way were also detected.