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WorksheetsAdaptations and Regulation
Total questions: 24
Worksheet time: 19mins
Why do organisms have adaptations?
Homeostasis
To be better suited to survive
To be more intimidating
To withstand the conditions of the environment they live in
Which of the following is an example of positive feedback?
Thermoregulation
Blood Pressure
Childbirth
Blood Sugar Levels
Which of the following detects a change in the internal environment?
Control Centre
Receptors
Effectors
Stimulus
Response
In the stimulus-response model, the _____________ determine(s) what the body needs to do to maintain homeostasis.
Control Centre
Receptors
Effectors
Stimulus
Response
In the stimulus-response model, recall which part performs the body's response.
Control Centre
Receptors
Effectors
Stimulus
Response
Mike is exercising and carbon dioxide is building up in his blood. This is detected by chemoreceptors in his blood vessels which send a message to the hypothalamus in the brain. This signals the heart rate and breathing rate to increase. What is the stimulus?
Hypothalamus
Increase in carbon dioxide in the blood
Chemoreceptors
Increase in heart and breathing rate
What is biomimicry?
The science of learning from nature to solve problems.
The science of watching birds.
Reading about science.
The science of watching ocean animals.
If blood water concentration is too low, _______ causes a _____ volume of water to be reabsorbed by the kidneys
ADH, higher
ADH, lower
TSH, higher
TSH, lower
When blood glucose levels drop, glucagon is released from the pancreas to convert glycogen back to glucose in the liver. The control centre is the
liver
reduced BGL
pancreas
glucagon
An example of a thermoreceptor is
rods and cones in the retina of the eye
nerve endings in the skin
pressure receptors in the skin
cochlear cells in the ear
What causes blood glucose levels to rise?
eating
vigorous exercise
sleeping
going to the toilet
What causes blood glucose levels to fall?
eating
vigorous exercise
sleeping
going to the toilet
What type of foods are broken down into glucose in the small intestine?
carbohydrates
proteins
fats
What do cells need glucose for?
photosynthesis
respiration
protein synthesis
combustion
Which organ produces insulin?
(a)
Insulin causes which organ to remove glucose from the blood?
liver
pancreas
brain
kidneys
What happens to the amount of insulin released if the blood glucose levels get low?
lots more is produced
nothing - low blood glucose has no effect on insulin levels
less / no insulin is produced
