Control and coordination Worksheet-31

Control and coordination Worksheet-31


Subjective questions:

  1. Why are some patients of diabetes treated by giving injections of insulin?


  1. Design an experiment to demonstrate hydrotropism.


  1. What is the function of receptors in our body? Think of situations where receptors do not work properly. What problems are likely to arise?


  1. Draw the structure of a neuron and explain its function.


  1. How does phototropism occur in plants?


  1. Which signals will get disrupted in case of a spinal cord injury?


  1. How does chemical coordination occur in plants?


  1. What is the need for a system of control and coordination in an organism?


  1. How are involuntary actions and reflex actions different from each other?


  1. Compare and contrast nervous and hormonal mechanisms for control and coordination in animals.


  1. What is the difference between the manner in which movement in the sensitive plant and movement in our legs takes place?


  1. What is a tropic movement? Explain with an example?


  1. What will happen if intake of iodine in our diet is low?


  1. What constitutes the central and peripheral nervous systems? How are the components of central nervous system protected?


  1. Mention one function for each of these hormones:

(a) Thyroxin (b) Insulin (c) Adrenaline (d) Growth hormone (e) Testosterone.


  1. Name various plant hormones. Also give their physiological effects on plant growth and development.


  1. How does chemical coordination take place in animals?


  1. Why is the flow of signals in a synapse from axonal end of one neuron to dendritic end of another neuron but not the reverse?


  1. Which part of the plant shows positive geotropism and why?


  1. Name the stress hormone in plants that functions during drought


  1. Name plant hormones which are growth promoters.


  1. Which plant hormone promotes ripening of fruits?


  1. Define growth regulators.


  1. Give reason, why endocrine glands release their secretions into the blood.


  1. Give reason, why movements in plants are not as apparent as in case of animals?


  1. Human brain can be broadly divided into three regions. Name them and give parts of any two of them.


  1. Differentiate between the following:

(a) Nervous information and hormonal information

(b) Tropic and nastic movements in plants.


  1. Differentiate between tropic and nastic movements.


  1. Draw a diagram of a neuron,


  1. Mention the functions of fore brain.