NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

CELL STRUCTURE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Relatively constant internal physical and chemical conditions that organisms maintain.
A
equilibrium
B
homeostasis
C
cellular balance
D
isotonic
Explanation: 

Detailed explanation-1: -Unicellular organisms must maintain homeostasis-relatively constant internal physical and chemical conditions. To maintain homeostasis, unicellular organisms grow, respond to the environment, transform energy, and reproduce.

Detailed explanation-2: -Homeostasis is the maintenance of a stable internal environment. Homeostasis is a term coined to describe the physical and chemical parameters that an organism must maintain to allow proper functioning of its component cells, tissues, organs, and organ systems.

Detailed explanation-3: -The term was coined in 1930 by the physician Walter Cannon. His book, The Wisdom of the Body, describes how the human body maintains steady levels of temperature and other vital conditions such as the water, salt, sugar, protein, fat, calcium and oxygen contents of the blood.

Detailed explanation-4: -The body maintains homeostasis for many factors. Some of these include body temperature, blood glucose, and various pH levels.

Detailed explanation-5: -Examples include thermoregulation, blood glucose regulation, baroreflex in blood pressure, calcium homeostasis, potassium homeostasis, and osmoregulation.

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