BIOMOLECULES AND ENZYMES

Detailed explanation-1: -A change in the environment is the stimulus; the reaction of the organism to it is the response.

Detailed explanation-2: -The nervous system takes in information through our senses, processes the information and triggers reactions, such as making your muscles move or causing you to feel pain. For example, if you touch a hot plate, you reflexively pull back your hand and your nerves simultaneously send pain signals to your brain.

Detailed explanation-3: -The ability of an organism to respond to external stimuli is called sensitivity. For example, Plants grow towards light(external stimuli) sources, and if the direction of light is changed, the plant will also change its direction of growth to accommodate for survival.

Detailed explanation-4: -Receptors. Receptors are groups of specialised cells. They detect a change in the environment stimulus. In the nervous system this leads to an electrical impulse being made in response to the stimulus.

Detailed explanation-5: -The nervous system allows humans to react to their surroundings. (a) Sense organs have receptors. Receptors detect changes in the environment. Which word describes a change in the environment?