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Related Concept Videos

Thermosensation01:43

Thermosensation

34.2K
Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
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Thermoregulation01:26

Thermoregulation

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The human body has a sophisticated thermoregulation system that employs negative feedback mechanisms to maintain an optimal core temperature. When the core temperature drops, peripheral and central thermoreceptors send signals to the hypothalamus, activating the heat-promoting center. This center triggers several responses aimed at increasing the core temperature. First, vasoconstriction reduces the flow of warm blood from internal organs to the skin so that the heat is not lost from the skin,...
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Photoelectric Effect02:26

Photoelectric Effect

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When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...
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Equipments Used to Measure Body Temperature01:13

Equipments Used to Measure Body Temperature

2.0K
Body temperature can be assessed using various devices and measured in Celsius or Fahrenheit.
Glass-bulb Thermometer:
Glass-bulb thermometers are hollow glass tubes with a bulb tip containing liquid such as ethanol or mercury. Historically, glass bulb mercury thermometers were the standard device to measure body temperature. Today, mercury thermometers are prohibited in many countries due to the hazardous effects of mercury and the risk of exposure if the glass bulb breaks. In general,...
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Temperature Measurement Sites01:14

Temperature Measurement Sites

3.8K
A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
3.8K
Assessing Body Temperature - Tympanic membrane01:14

Assessing Body Temperature - Tympanic membrane

1.3K
Assessing tympanic membrane temperature involves using a tympanic membrane thermometer (TMT). Here is a step-by-step guide:
Step 1: Begin by practicing good hand hygiene to prevent the transmission of microorganisms.
Step 2: Turn on the thermometer and wait until the ready sign appears on the screen to ensure accurate measurement.
Step 3: Slide the probe cover in place to prevent cross-contamination.
Step 4: Instruct the patient to tilt their head to the side for comfort and check for cerumen...
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Updated: Mar 7, 2026

Fabrication and Testing of Photonic Thermometers
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Fabrication and Testing of Photonic Thermometers

Published on: October 24, 2018

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Thermosensing Enlightened.

Carolin Delker1, Martijn van Zanten2, Marcel Quint1

  • 1Institute of Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, Betty-Heimann Str. 5, 06120 Halle (Saale), Germany.

Trends in Plant Science
|February 9, 2017
PubMed
Summary
This summary is machine-generated.

Plant photoreceptor phytochrome B (phyB) acts as a thermosensor, revealing a key mechanism for high temperature responses. This finding is crucial for engineering climate-resilient crops.

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Area of Science:

  • Plant molecular biology
  • Environmental stress response
  • Crop science

Background:

  • Global warming necessitates developing crops tolerant to high temperatures.
  • Understanding plant thermosensing is vital for crop resilience.
  • Previous molecular mechanisms for temperature signaling were incomplete.

Purpose of the Study:

  • To elucidate the molecular mechanisms underlying plant responses to high ambient temperatures.
  • To identify the thermosensing component in plants.
  • To provide a basis for engineering heat-tolerant crops.

Main Methods:

  • Investigated the role of known signaling factors in temperature perception.
  • Utilized recent molecular biology techniques to identify novel thermosensors.
  • Focused on the function of photoreceptors in thermal sensing.

Main Results:

  • Identified the photoreceptor phytochrome B (phyB) as a key thermosensor in plants.
  • Demonstrated phytochrome B's dual role in light and temperature perception.
  • Two independent studies confirmed phytochrome B's thermosensing capability.

Conclusions:

  • Phytochrome B is a crucial component of the plant thermosensing machinery.
  • This discovery opens new avenues for understanding plant adaptation to climate change.
  • Targeting phytochrome B offers a strategy for enhancing crop heat tolerance.