Question 1 (1 point) Beginning with the stimulus, order the following steps of a
ID: 3520566 • Letter: Q
Question
Question 1 (1 point)
Beginning with the stimulus, order the following steps of a reflex loop maintained by homeostasis.
Question 1 options:
1 2 3 4 5 6 7 8
output signal
stimulus
input signal
integrator
target
sensor
response
feedback loop
Question 2 (1 point)
Which of the following pairs correctly matches an input component with an output component of glucose homeostasis (refer to diagram).
Question 2 options:
high blood glucose ....glucose uptake by liver cells
low blood glucose .... glycogen breakdown by muscle cells
high blood glucose .... glucagon secretion by cells of pancreas
low blood glucose .... insulin secretion by cells of pancreas
Question 3 (1 point)
To distinguish between a response loop (reflex) and homeostasis a characteristic would need to be true for one and not the other. Study the following statements. Which distinguishes a response loop and homeostasis.
Question 3 options:
a response loop includes an integration step
a response loop includes an output step
a response loop includes an input step
homeostasis includes negative feedback
homeostasis includes a feed forward step
Question 4 (1 point)
Choose all of the following characteristics that are characteristics of negative feedback control
Question 4 options:
works through a reflex (response loop) to achieve homeostasis
changes the input of a homeostatic mechanism
changes the set point of a homeostatic mechanism
changes the output of a homeostatic mechanism
Question 5 (1 point)
Match the following characteristics of glucose regulation to the essential elements of a homeostatic mechanism.
Question 5 options:
rising blood glucose signals alpha cells of the pancreas
liver cells breakdown glycogen to release glucose
alpha cells of the pancreas release glucagon
1234
blood glucose levels rise
beta cells of pancreas react to high blood glucose
cells of the body increase rate of glucose uptake from the blood
fluctuating blood glucose crosses the set point of the pancreas
input
integration
output
feedback
Question 6 (1 point)
In Type I diabetes beta cells are eliminated from the pancreas. In Type II diabetes, cells of the body lack the ability to sense insulin. Choose all of the following that characterizes the pathology with respect to the essential elements of homeostasis correctly.
Question 6 options:
The output step of the reflex (response loop) is impaired in both diseases
the set point is lost in Type II diabetes
Both types of diabetes impair negative feedback
Cells of the body are stimulated by insulin to form more glycogen in Type II but not Type I diabetes
output signal
stimulus
input signal
integrator
target
sensor
response
feedback loop
Explanation / Answer
Question 1 stimulus goes to input signal and to sensor and then to integration which is followed by output signal goes to target and response is generated this is a complete feedback loop,
Question 2 answer is option A , in high glucose condition glucose is up taken by the liver and convert to glycogen and stored in the liver , while in the case of high blood glucose there is release of the insulin from the pancreas not the glucagon .
And in case of low blood glucose there is release of glucagon from the pancreas not the insulin.
Question 3 homeostasis can be differentiated from the response loop with the help that homeostasis is a negative feedback
Q 4 negative feedback mechanism work through respond slope reflex to maintain to achieve the homeostasis of body
Q 5 rising blood glucose level is a input
integration- stimulate the beta cell of the pancreas and there is release of insulin by beta cells which lead to output- decrease blood glucose level and increase uptake by the peripheral cells
Feedback - fluctuating blood glucose level will crosses the set point of the pancreas.