Lesson 4.5.3.6
4.5.3.6 Feedback systems (HT only) Quiz: AQA Combined Science, Unit 5
20 questions
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Lesson 4.5.3.6, Feedback systems (HT only): 20 multiple choice questions for the AQA GCSE Combined Science (8464), Unit 5: Homeostasis and response, written with Revision Ninja.
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The 20 questions
-
Which gland produces adrenaline?
- Adrenal glands
- Pancreas
- Pituitary gland
- Thyroid gland
-
Which physiological effect is directly caused by adrenaline?
- Decreased breathing rate
- Increased heart rate
- Lowered blood pressure
- Reduced muscle tension
-
What does adrenaline boost the delivery of to brain and muscles?
- Water and ions
- Proteins and lipids
- Oxygen and glucose
- Carbon dioxide and urea
-
Which gland produces thyroxine, and what does it stimulate?
- Thyroid gland; metabolic rate
- Pituitary gland; egg maturation
- Adrenal gland; heart rate
- Pancreas; blood glucose
-
What does adrenaline prepare the body for?
- Sleep and digestion
- Flight or fight
- Reproduction
- Growth only
-
How are blood levels of thyroxine controlled in the body?
- Hormonal saturation
- Enzyme inhibition
- Positive feedback
- Negative feedback
-
What role does thyroxine play in the body?
- Growth and development
- Digestion of fat
- Ovulation only
- Blood clotting
-
During negative feedback, what happens when thyroxine levels become too high?
- Stimulation is reduced
- Metabolism stops entirely
- Receptors are destroyed
- Production is doubled
-
A person is startled and their heart rate rises quickly. Which hormone is most likely responsible?
- Thyroxine
- Insulin
- Oestrogen
- Adrenaline
-
Which combination of changes is triggered by adrenaline release?
- Slower heartbeat
- Faster heartbeat
- Reduced glucose release
- Lowered blood flow
-
What is a direct result of thyroxine raising the basal metabolic rate?
- Lower body temperature
- Reduced heart rate
- Increased fat storage
- Higher resting energy use
-
In negative feedback control, what occurs when thyroxine levels rise too high?
- Permanent gland shutdown
- Blocked receptor sites
- Reduced production signal
- Increased hormone secretion
-
A diagram shows high thyroxine suppressing the hormone that stimulates it. What is this?
- Direct nervous control
- Positive feedback
- Random control
- Negative feedback
-
Which bodily change is expected during a strong adrenaline response?
- Decreased breathing rate
- Constricted pupils
- Relaxed skeletal muscles
- Increased breathing rate
-
Which hormone is important for growth and development?
- Thyroxine
- Glucagon
- Adrenaline
- Oestrogen
-
What type of control mechanism regulates blood thyroxine levels?
- Negative feedback
- Hormonal catalyst
- Positive feedback
- Enzyme denaturation
-
Which hormone acts rapidly to prepare the body for fight or flight?
- Thyroxine
- Glucagon
- Insulin
- Adrenaline
-
On a hormone graph, what does a falling thyroxine curve after a peak show?
- Positive feedback loop
- Glandular exhaustion failure
- Complete hormone absence
- Negative feedback working
-
Which hormone stimulates the basal metabolic rate in humans?
- Oestrogen
- Thyroxine
- Adrenaline
- Testosterone
-
Which gland releases thyroid-stimulating hormone to regulate thyroxine production?
- Pancreas
- Pituitary gland
- Thyroid gland
- Adrenal gland
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