Worksheetsa&p1
Total questions: 10
Worksheet time: 5mins
According to the video, what is the primary role of a negative feedback loop?
To amplify a change in the body's condition.
To reverse a change and restore the body's internal stability.
To increase the body's metabolic rate in response to a stimulus.
To create a new set point for a physiological variable.
Which of the following best describes the 'set point' in a homeostatic system?
The change or deviation that a feedback loop detects.
The ideal, normal value for a physiological variable.
The component that carries out the response to a stimulus.
The maximum value a variable can reach before a feedback loop is activated.
In the negative feedback loop for blood sugar regulation, what is the stimulus that causes insulin to be released?
A rise in body temperature.
Not quite
Body temperature is regulated by a separate negative feedback loop and does not directly affect insulin release.
A drop in blood glucose levels.
A rise in blood glucose levels.
A drop in blood pressure.
Based on the video's description, which of the following is the 'effector' in the blood glucose negative feedback loop?
The receptors that detect the change in blood glucose.
The liver and body cells, which absorb or release glucose.
The pancreas, which produces insulin and glucagon.
The blood, which contains glucose.
Which hormone is released by the pancreas to increase blood glucose levels when they fall too low?
Epinephrine
Insulin
glucagon
thyroxine
The video describes the negative feedback loop as a continuous cycle. What is the final step of this cycle?
The effector produces a hormone to reverse the stimulus.
The response reverses the change and returns the variable to the set point.
The stimulus is created and detected again.
The control center sends a signal to the receptor.
What is the key difference between negative feedback and positive feedback?
Negative feedback is more common in the body than positive feedback.
Negative feedback is used for regulation, while positive feedback is used for disease.
Negative feedback amplifies a change, while positive feedback reverses it.
Negative feedback reverses a change, while positive feedback amplifies it.
If a person's pancreas could no longer produce glucagon, what would be the likely effect on their blood glucose levels?
When blood glucose levels rise, the pancreas releases insulin. How does insulin primarily work to lower blood glucose?
If a person has a condition where their blood glucose levels drop to dangerous lows, which of the following would be an appropriate homeostatic response?
