Homeostasis is the body’s ability to maintain stable internal conditions, such as temperature and pH, despite external changes, ensuring optimal functioning of physiological processes.
Biology class 12 chapter 1 Notes
The animals which are capable of varying degrees of endothermic heat production but generally do not regulate their body temperature within a narrow range: Heterotherms
When haemoglobin of the blood is fully saturated with oxygen, the 100cc of blood comains: 20cc of oxygen
Fresh water flatworms excrete very dilute: Urine
Cockroach excrete nitrogenous wastes it the form: Uric Acid
Dialyses means: Cleaning the blood
Bowman capsule continues as extensively convoluted proximal tubule loop of henie and the distal tubule which empties into: Collecting tubules
Blood supplied to kidneys from each cardiac beat is: 20%
A pair of kidneys consists of millons of functional units called: Nephrons
Mammalian kidney including human is adapted to conserve water by over: 99.50%
In human beings, the homeostatic thermostat is present in a part of the brain called as: Hypothalamus
Which part of the air passage way possesses chartilage plates in its wall: Distal religion of bronchi
The wall of trachea(windpipe) and bronchi of man is fernished with a series of incomplete: Cartilaginous rings
The execratory product with require minimum water for its removal: Uric acid
Which plants have the adaptation to remove the flooding of its cells in fresh water: Hydrophytes
About 500 ml water is needed to excrete 1g of ammonia: Nitrogen
High degree of renal failure is also called as: uremia
When the human blood leaves the capillary bed of the tissue, most of the carbon dioxide is inthe form of: Bicarbonate ions
Earthworm is the ideal example of tubular excretory system called: Metanephridia
Which one of the following is not endotherm: Amphibian
Saliva and urine are used for evaporative cooling by: Bat
the active uptake of sodium in the loop of Henle is provided by the actioon of hormone: Aldosterone
Human body temperatrue is controlled by: Hypothalamus
Important : Review all previous years’ 12 class past papers for comprehensive practice and better exam preparation.