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WorksheetsHomeostasis
Total questions: 25
Worksheet time: 25mins
The maintenance of an organism’s internal environment is called:
compensating
homeostasis
balancing
routine
According to the model, what is a normal blood glucose (sugar) level?
270 mg/100mL
180 mg/100 mL
45 mg/100 mL
90 mg/100 mL
According to the model, what is the response to HIGH blood glucose (sugar)?
Pancreas releases insulin into blood
Pancreas releases glucagon into blood
According to the model, what is the response to LOW blood glucose (sugar)?
Pancreas releases insulin into blood
Pancreas releases glucagon into blood
Homeostasis
allows for a wildly fluctuating internal environment
is impossible in vertebrates
is the maintenance of a relatively stable internal environment
is the maintenance of a relatively stable external environment
Positive Feedback loop
decreases the stimulus
increases the stimulus
Negative feedback returns BACK to the set point
False
True
If the environment gets cold, we will often shiver in order to:
keep body temperature the same as the external temperature
decrease body temperature
increase body temperature
regulate blood pressure
Negative Feedback loop
decreases the stimulus
increases the stimulus
This graph shows an example of...
Blood sugar regulation
Homeostasis
Negative feedback
Positive feedback
The ability to maintain body temperature within a certain range is ...
thermodynamics
thermoregulation
thermostat
thermometer
How does the body respond when more oxygen is required?
Decreasing heart rate
Increasing heart rate
Decreasing blood pressure
Increasing blood pressure
Identify the STIMULUS.
temperature change is noticed
person begins to sweat
body temperature decreases
person begins to exercise
Identify the RESPONSE.
Scenario: A person begins to exercise which causes their body temperature to increase. The temperature change is noticed and the person begins to sweat and their body temperature decreases.
temperature change is noticed
body temperature increases so the person begins to sweat
body temperature decreases
person begins to exercise
Homeostasis in the human body is often maintained by a:
the brain only
solar feedback loop
the muscles
negative feedback loop
What describes a lack of water in the blood?
Dehydration
Rehydration
Hydration
Concentrated
Your body is too hot. What senses your body temperature?
nerve cells
sweat cells
blood cells
muscle cells
With low oxygen levels, your breathing rate will increase. When your oxygen levels rise, what is the appropriate response?
stop breathing
increase heart rate
keep breathing rate high
return breathing rate to baseline
When your glucose levels are too high, what is the appropriate response?
urinate
release glucagon
eat sugar
release insulin
Homeostasis is defined as:
The process of maintaining a stable internal environment
The process of maintaining a stable environment
Keeping your temperature at a set point
Receptors sensing changes in your body
Which of the following is an example of a negative feedback mechanism in the human body?
Sweating to reduce body temperature
Blood clotting to stop bleeding
Childbirth contractions
Blood sugar spike after eating
What role does the hypothalamus play in homeostasis?
Regulates body temperature
Controls voluntary movements
Produces digestive enzymes
Filters waste from the blood
How does the body respond to a decrease in blood glucose levels?
Releases insulin
Releases glucagon
Increases heart rate
Decreases breathing rate
Which of the following best describes homeostasis?
A static state of equilibrium
A dynamic process of maintaining balance
An unchanging internal environment
A process that only occurs in humans
In an experiment, a scientist observes that a plant maintains its internal water balance despite changes in external humidity. This is an example of:
Photosynthesis
Homeostasis
Transpiration
Respiration
