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Related Concept Videos

Pigmentation01:19

Pigmentation

The color of the skin is influenced by a number of pigments, including melanin, carotene, and hemoglobin. Recall that melanin is produced by cells called melanocytes, which are found scattered throughout the stratum basale of the epidermis. The melanin is transferred to the keratinocytes via melanosomes.
Melanin occurs in two primary forms: eumelanin that provides black and brown pigment and pheomelanin that provides red color. Dark-skinned individuals produce more melanin than those with pale...
Changes in Skin Color: Clinical Perspectives01:14

Changes in Skin Color: Clinical Perspectives

The first thing a clinician sees is the skin, so the examination of the skin should be part of any thorough physical examination. Most skin disorders are relatively benign, but a few, including melanomas, can be fatal if untreated. A couple of the more noticeable disorders, albinism and vitiligo, affect the appearance of the skin and its accessory organs.
Albinism
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Energy Transfer in Chemical Reactions

Chemical reactions require sufficient energy to cause the matter to collide with enough precision and force that old chemical bonds can be broken and new ones formed. In general, kinetic energy is the form of energy powering any type of matter in motion. Imagine a person building a brick wall. The energy it takes to lift and place one brick on top of another is the kinetic energy—the energy matter possesses because of its motion. Once the wall is in place, it stores potential energy. Potential...
Role of Skin in Vitamin D Synthesis01:23

Role of Skin in Vitamin D Synthesis

The skin plays a crucial role in the synthesis of vitamin D, a vital nutrient for various physiological processes in the body. Vitamin D is unique because it can be synthesized in the skin through a series of chemical reactions triggered by exposure to ultraviolet B (UVB) radiation from sunlight.
The solar UV B rays (290-315 nm) are absorbed by the skin, and 7-dehydrocholesterol (provitamin D3) photolyzes it to previtamin D3, which undergoes a rapid transformation to vitamin D3(cholecalciferol).
Mutations01:35

Mutations

Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Homeostatic Imbalances in Body Temperature01:19

Homeostatic Imbalances in Body Temperature

Hyperthermia occurs when the body's temperature becomes unusually high, often due to heat exposure, intense physical activity, or certain illnesses. This condition can create a dangerous cycle where elevated body temperature increases the metabolic rate, generating more heat and potentially leading to organ failure and brain damage. A severe form of hyperthermia, called heat stroke, can raise body temperature to life-threatening levels. Fever, on the other hand, is a controlled form of...

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Studying Chronic Exposure of Mice to Ultraviolet B Radiation
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Sunspot dynamics are reflected in human physiology and pathophysiology.

William J M Hrushesky1, Robert B Sothern, Jovelyn Du-Quiton

  • 1Medical Chronobiology Laboratory, University of South Carolina, Columbia, South Carolina, USA. williamhrushesky@gmail.com

Astrobiology
|March 12, 2011
PubMed
Summary
This summary is machine-generated.

Solar electromagnetic storms show 10-11 and 5-6 year cycles that correlate with human health. This study found similar periodicities in cervical pathologies and human physiology, suggesting a link between solar activity and biological rhythms.

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Area of Science:

  • Environmental Science
  • Human Physiology
  • Gynecologic Oncology

Background:

  • Solar electromagnetic storms exhibit periodicities of approximately 10-11 and 5-6 years.
  • These solar cycles may influence biological events on Earth.
  • Previous research suggests potential links between solar activity and human health outcomes.

Purpose of the Study:

  • To investigate whether sunspot periodicity correlates with the incidence of cervical epithelial histopathologies detected via Pap smears.
  • To examine if solar cycle periodicities are reflected in human physiological functions.
  • To explore the relationship between solar magnetic storms and human pathophysiology.

Main Methods:

  • Analyzed monthly solar flux and sunspot numbers from January 1983 to December 2003.
  • Examined 1,182,421 Pap smear records for six types of cervical epithelial changes.
  • Monitored six human physiological functions (temperature, pulse, blood pressure, respiration, peak expiratory flow) over 34,500 self-measurement sessions.

Main Results:

  • Sunspot numbers and solar flux displayed prominent 10-year and less-prominent 5.75-year periodicities.
  • All six Pap smear-detected cervical pathologies exhibited strong 10-year and weaker 5.75-year cycles.
  • All six measured human physiological functions also showed similar annual rhythmic cycles, phase-locked with solar maxima.

Conclusions:

  • Human physiological functions and cervical pathologies exhibit cyclic rhythms that are phase-locked with solar magnetic storm periodicities.
  • These findings support the hypothesis that solar activity influences human physiology and pathophysiology.
  • The study adds evidence to the connection between extraterrestrial phenomena and biological rhythms.