IB myp 4-5 Biology – Practice Questions- All Topics
Topic :Interaction with environment-Receptors and Hormones
Topic :Interaction with environment– Weightage : 21 %
All Questions for Topic : Tropism,Senses,Nervous System,Receptors and hormones
Question:
What hormone is secreted by the pancreas after a meal with a high sugar content?
▶️Answer/Explanation
Ans: Insulin.
Question:
Explain which type of feedback occurs in these situations:
a) cruise control in a vehicle
▶️Answer/Explanation
Ans: Negative feedback.
b) an exothermic chemical reaction
▶️Answer/Explanation
Ans: Positive feedback.
c) a rock concert when a guitarist gets too close to a loudspeaker
▶️Answer/Explanation
Ans: Positive feedback.
d) the water tank of a toilet with a float valve.
▶️Answer/Explanation
Ans: Negative feedback.
Question:
Viral infections can result in fever, which is a higher than normal body temperature. Discuss whether fever is maintained by positive or negative feedback.
▶️Answer/Explanation
Ans: Negative feedback; but with the set point raised to a higher temperature.