WorksheetsHomeostasis and Stimulus-response
Total questions: 15
Worksheet time: 12mins
Define stimulus.
Change in an organism’s environment that causes it to react.
How the organism reacts to the stimulus.
When the body temperature drop below normal ranges, arterioles in the skin will
dilate to allow less blood to flow to skin surface
constrict to allow less blood to flow to skin surface
dilate to allow more blood to flow to skin surface
constrict to allow more blood to flow to skin surface
This graph shows an example of...
Blood sugar regulation
Homeostasis
Negative feedback
Positive feedback
Which of the following is not regulated by homeostasis?
body temperature
blood sugar
blood pH
body movements
Which of the following is an example of positive feedback?
Thermoregulation
Blood Pressure
Childbirth
Blood Sugar Levels
Which body system controls the body to maintain homeostasis?
excretory
nervous
circulatory
skeletal
Negative feedback is when changes occurring,
return the body to the original condition
return the body to a different condition
make the body feel bad
make the body move
Things in the human body that need to stay the same
Glucose
Temperature
Blood Pressure
All of the above
Which of the following detects a change in the internal environment?
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 receptor?
Hypothalamus
Increase in carbon dioxide in the blood
Chemoreceptors
Increase in heart and breathing rate
