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Biology 12 Chapter 18 Chemical Coordination -37
1.
In which feedback mechanism, an end product speeds up its production?
a) Implication- feedback
b) Negative- feedback
c) Positive- feedback
d) Neutral- feedback
2.
What is the effect in the speed of an end product in positive feedback?
a) Production is decelerated
b) No production
c) Production is speed up
d) Production is retarded
3.
Childbirth is an example of which feedback mechanism?
a) Negative- feedback
b) Positive- feedback
c) Implication- feedback
d) Neutral- feedback
4.
Which gland is stimulated by brain to secrete oxytocin?
a) Placenta
b) Adrenal gland
c) Pituitary gland
d) Gonads
5.
Which of the following stimulates pituitary gland to secrete oxytocin?
a) Bones
b) Beta cells
c) Alpha cells
d) Brain
6.
High blood glucose level is detected by insulin-secreting cells of...............?
a) Bones
b) Brain
c) Thyroid gland
d) Pancreas
7.
Low blood glucose level is detected by glycogen-secreting cells of...............?
a) Pancreas
b) Bones
c) Thyroid gland
d) Brain
8.
By which cells of pancreas, high blood glucose level is detected?
a) Glycogen-secreting cells
b) Protein-secreting cells
c) Glucose-secreting cells
d) Insulin-secreting cells
9.
By which cells of pancreas, low blood glucose level is detected?
a) Insulin-secreting cells
b) Glycogen-secreting cells
c) Protein-secreting cells
d) Glucose-secreting cells
10.
Which of the following respond to the extension by signalling the hypothalamus?
a) Stretch coordinators in the cervix
b) Stretch-receptive neurons in the placenta
c) Stretch coordinators in the placenta
d) Stretch-receptive neurons in the cervix
11.
Which hormone is released when hypothalamus is signalled by stretch-receptive neurons?
a) Cholecystokinin
b) Gastrin
c) Somatotrophin
d) Oxytocin
12.
In which feedback mechanism, an endocrine gland is sensitive?
a) Negative- feedback
b) Positive- feedback
c) Implication- feedback
d) Neutral- feedback
13.
When blood glucose level becomes too high, where are beta cells present?
a) Hypothalamus
b) Parathyroid gland
c) Islets of Langerhans
d) Thyroid gland
14.
Which hormone is released by beta cells when blood glucose level becomes too high?
a) Glucagon
b) Somatotrophin
c) Cholecystokinin
d) Insulin
15.
When blood glucose level becomes too high, where are alpha cells present?
a) Thyroid gland
b) Islets of Langerhans
c) Hypothalamus
d) Parathyroid gland
16.
Which hormone is released by alpha cells when blood glucose level becomes too loo?
a) Cholecystokinin
b) Insulin
c) Glucagon
d) Somatotrophin
17.
When beta cells release insulin?
a) If blood pressure becomes too high
b) If blood glucose level becomes too low
c) If blood glucose level becomes too high
d) If blood pressure becomes too low
18.
When alpha cells release glucagon?
a) If blood glucose level becomes too high
b) If blood pressure becomes too low
c) If blood pressure becomes too high
d) If blood glucose level becomes too low
19.
Which cells release insulin when blood glucose level becomes too high
a) Gamma cells
b) Beta cells
c) Alpha cells
d) All of these
20.
The pancreas decreases its output of insulin in response to..........?
a) Changing cycle of dark and light
b) An increase in body temperature
c) An increase in blood glucose
d) A decrease in blood glucose
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