WorksheetsTopic 3: Homeostasis and Feedback Mechanisms
Total questions: 20
Worksheet time: 13mins
What is homeostasis?
the process of maintaining relatively stable internal conditions
All the physical and chemical changes occurring in an organism
the process of becoming bigger
Movement of substances throughout the body
Which body system controls the body to maintain homeostasis?
excretory
nervous
circulatory
skeletal
Which correctly identifies all steps involved in negative feedback?
initiation event, stimulus, positive feedback, response, effector, control center, receptor
termination event, stimulus, reply, effector, control center, and receptor
initiation event, response, stimulus, effector, command center
initiation event, stimulus, receptor, control center, effector and response
When you are hot, your body sweats to cool you down. This means your temperature went above normal and your body sweats to counteract that change to bring you back to normal. What kind of feedback loop would this be?
Negative Feedback Loop
Positive Feedback Loop
Neutral Feedback Loop
Linear Feedback Loop
Positive Feedback loops are...
Counteract changes that move above or below set values.
more common
regulate body temp
Purposeful pushes above normal set values.
What is an example of a positive feedback mechanism?
Which part of the homeostatic mechanism is responsible for determining the setpoint for a variable? (Ex: my body temperature is 97.8, lower than the 'typical' 98.6. Which part set this value for me?)
stimulus
receptor
control center
effector
What is negative feedback in homeostasis?
Regulatory mechanism that counteracts changes from the normal set point
Process that has no effect on changes from the normal set point.
Regulatory mechanism that promotes changes from the normal set point.
Process that amplifies changes from the normal set point.
Why is it important for the body to have both positive and negative feedback mechanisms?
To disrupt homeostasis and cause dysfunction in the body.
To only have positive feedback mechanisms and ignore negative feedback.
To rely solely on negative feedback mechanisms and ignore positive feedback.
To maintain homeostasis and ensure proper body function.
Which of the following correctly pairs the hormone and the response that it causes
Glucagon - makes body cells take in glucose
Insulin - makes body cells take in glucose
Pancreas - makes liver release stored glucagon
Liver - makes pancreas take in stored insulin
Which hormone is released when blood sugar gets too high?
glucose
glucagon
glycogen
insulin
Which hormone is released when blood sugar gets too low?
glucose
glucagon
glycogen
insulin
which organ will balance the glucose level in the blood by releasing hormones like insulin or glucagon?
Stomach
Small intensine
large intestine
Pancreas
What causes blood glucose levels to rise?
eating
vigorous exercise
sleeping
going to the toilet
What causes blood glucose levels to fall?
eating
fasting and vigorous exercise
sleeping
going to the toilet
The main function of stomata is to
capture sunlight
protect leaves from insects
allow gases to move rapidly in/out of leaves
release sugars into the atmosphere
What is the relationship between stomata and photosynthesis in plants?
The stomata is dependent on photosynthesis.
The stomata are reactants of photosynthesis.
Photosynthesis is dependent on stomata.
Photosynthesis is independent of stomata.
