Quiz: Coordination and Response

Question 1
Define the term ‘reflex action’. [2]

Question 2
The diagram below shows a simple reflex arc. Reflex Arc

  1. Identify the role of the effector in this process. [1]
  2. Explain why reflex actions are important for survival. [2]

Question 3
Identify the hormone produced by the pancreas that lowers blood glucose levels. [1]

Question 4
Plants respond to their environment through growth movements.

  1. Define ‘phototropism’. [2]
  2. State the name of the plant hormone responsible for controlling phototropism. [1]

Question 5
Compare the structure and function of a sensory neuron and a motor neuron. [4]

Question 6
Describe the process of transmission of an impulse across a synapse. Your answer must include:

  • The role of neurotransmitters. [3]
  • The change in electrical state of the post-synaptic membrane. [2]

Question 7
Describe the negative feedback mechanism that regulates blood glucose levels when blood glucose concentration increases after a meal. [5]

Question 8
Geotropism

Explain how auxin causes the shoot to bend towards light, referring to its distribution in the shoot tip and its effect on cell elongation. [4]

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