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Homeostasis and Response 20 Questions

Test on 20/11/25
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jw2
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Last updated: November 17, 2025
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First submittedNovember 17, 2025
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Hint
Answer
Define Homeostasis
Maintaining a constant internal environment
Define a stimulus
A detectable change in the physical or chemical structure of an organism's internal or external environment
What detects a stimulus?
A receptor
Give an example of an effector
A muscle (movement) or a gland (hormone release)
State the nervous pathway for a reflex action (separated by a -dash)
Stimulus-receptor-sensory neurone-relay neurone-motor neurone-effector-response
What is a difference between a voluntary response and a reflex arc?
-A voluntary response takes longer -A voluntary response is coordinated in the brain -Reflex arc does not need to be coordinated by the brain so it is faster
What is a synapse?
The connection and gap between neurones
Describe a difference between the nervous and endocrine systems
Nervous- releases nerve impulse as messages. Fast, short lives, specific Endocrine- releases chemical messages (hormones). Slow, long lasting, non specific
Which hormone lowers blood glucose levels?
Insulin
Where is this hormone produced?
Pancreas
Which hormone raises blood glucose levels and where is it produced?
Glucagon in the pancreas
What is type 1 diabetes?
Type 1-No insulin is produced, often detected early in life
What is type 2 diabetes?
Type 2-insulin may still be produced but poor lifestyle choices, such as obesity, causes cell receptors to no longer respond to insulin
What is the function of FSH?
-matures the egg -stimulates oestrogen production
What is the function of oestrogen?
-thickens the lining of the uterus -inhibits FSH -stimulates LH release
What is the function of LH?
Releases the egg
What is the role of TSH and Thyroxine?
TSH (produced in pituitary gland) stimulates Thyroxine Thyroxine (produced in Thyroid gland) inhibits TSH This is a negative feedback relationship.
What term describes the control system where the detection of a high level of a chemical causes a reduction on the production of that chemical
Negative feedback
Which hormones are in the contraceptive pill? Why?
Oestrogen- inhibits FSH so no egg development Progesterone- inhibits LH so no egg release
Which hormones are involved with IVF treatment?
LH and FSH
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