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NTT CIE A2 Biology Homeostasis Test Questions & Answers 2024/2025
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NTT CIE A2 Biology Homeostasis Test Questions & Answers 2024/2025
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NTT CIE A2 Biology Homeostasis TestQuestions & Answers 2024/2025
Define the term homeostasis. - ANSWERScontrol systems to keep the internal environment near
constant.
Physiological factors controlled in homeostasis in mammals are... - ANSWERSbody temperature, blood
pH, glucose conc, water potential, respiratory gases conc and metabolic wastes.
Define the term negative feedback in homeostasis. - ANSWERSA reaction that causes a decrease in
function in response to some kind of stimulus. Often it causes the output of a system to be lessened; so,
the feedback tends to stabilise the system.
Effectors include... - ANSWERSmuscles and glands
Receptors... - ANSWERSdetect stimuli that are being regulated.
The input is... - ANSWERSthe sensory information detected by the receptor going to the brain.
The output is... - ANSWERSthe instruction from the brain to the effector to provide a response.
The information in the NS is in the form of... - ANSWERSelectrical impulses transmitted along neurones.
The information in the endocrine system is in the form of... - ANSWERSchemical messengers called
hormones.
Hormones travel in the... - ANSWERSblood to their target organs.
Define thermoregulation. - ANSWERSthe control of the body temperature.
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