Notes and Study material for Exams
HORMONES Hormones are chemical messengers that are secreted directly into the blood, which carries them to organs and Tissues of the body to exert their functions. There are many types of hormones that act on different aspects of bodily functions and processes. Some of these include: Development and Growth Metabolism of food items Sexual function … Read more
Immunity is disease resistance and is of following two types:- Natural or Innate Immunity:- It is present from birth and is inherited from birth by the offspring from the mother.In this form of immunity the response from the organism against the pathogen is immediate in the form of non-specific immune response without the need of recognizing the … Read more
Vaccines A vaccine is a biological preparation that improves immunity to a particular disease. A vaccine typically contains an agent that resembles a disease-causing microorganism, and is often made from weakened or killed forms of the microbe, its toxins or one of its surface proteins. The agent stimulates the body’s immune system to recognize the … Read more
Ozone (O3) is a molecule made up of three atoms of Oxygen (O), and is mostly found in the strato- sphere, where it protects us from the Sun’s harmful ultraviolet (UV) radiation. Although it represents only a tiny fraction of the Atmosphere, ozone is crucial for life on Earth. The stratospheric ozone layer forms a … Read more
Ozone (O3) is a molecule made up of three atoms of Oxygen (O), and is mostly found in the strato- sphere, where it protects us from the Sun’s harmful ultraviolet (UV) radiation. Although it represents only a tiny fraction of the Atmosphere, ozone is crucial for life on Earth. The stratospheric ozone layer forms a … Read more
–2/”>a >DOCTYPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”> Blood makes up about 8% of the human body weight. It contains erythrocytes, leucocytes, thrombocytes (platelets) and plasma. The volume Percentage of all blood cells in the whole blood is about 45% of adults (hematocrit). The rest consists of liquid plasma (e.g. water, plasma proteins, electrolytes … Read more
The environmental effects of ozone depletion are: Increased levels of ultraviolet radiation reaching the Earth’s surface. Damage to plants and animals. Increased risk of skin cancer and other health problems in humans. Decreased crop yields. Damage to coral reefs. Changes in the global climate. Ozone depletion is a serious environmental problem that has a number … Read more