Control and coordination Worksheet-30

Control and coordination Worksheet-30


Subjective questions:

  1. Which lobe of cerebral hemisphere is the region for speech?


  1. Name the scientists who first introduced the term 'hormone'.


  1. What is the term used for a person who specializes in endocrine glands?


  1. Which endocrine glands are associated with kidneys?


  1. Which of the following has no ducts, exocrine gland or endocrine gland?


  1. Write the function of thyroxine hormone in our bodies.


  1. We suddenly withdraw our hand when a pin pricks. Name the type of response involved in this action.


  1. Which hormone helps in lowering the level of blood glucose (sugar) in human beings?


  1. A potted plant is made to lie horizontally on the ground. Which part of the plant will show

(i) positive geotropism, (ii) negative geotropism.


  1. Name the hormone that helps in regulating level of sugar in our blood. Name the gland that secretes it


  1. What is cranium? What is its function?


  1. Name the main parts of the nervous system of grasshopper (insect).


  1. Give the scientific names for the following receptors in animals:

(a) receptors for light (b) receptors for sound (c) receptors for smell (d) receptors for touch (e) receptors for heat.


  1. Name the fluid-filled cavities present in the diencephalon of forebrain and medulla oblongata of hindbrain.


  1. (a) Name the secretions released by neurosecretory cells of hypothalamus. Where is  hypothalamus located?

(b) Why is hypothalamie-pituitary system important?


  1. (a) Name atleast one photochormone which stimulates growth in plants.

(b) Name the phytohormone which inhibits or retards growth in plants.


  1. (a) Which disease is caused by the hypersecretion of thyroid hormone?

(b) Which disease is caused by the hyposecretion of thyroid hormones in infants?


  1. (a) What is the cause of diabetes insipidus disease in man?

(b) What is the cause of diabetes mellitus disease in man?


  1. (a) Which plant hormone promotes growth and ripening of fruits?

(b) Which plant hormone promotes cell division in plants?


  1. (a) Which endocrine gland secretes melatonin hormone? Where is this gland located?

(b) Which endocrine gland secretes gonadotropic hormones? Where is this gland located?


  1. What is the difference between a reflex action and walking?


  1. What happens at the synapse between two neurons?


  1. How do we detect the smell of an agarbatti (incense stick)?


  1. What is the role of the brain in reflex action?


  1. What are plant hormones?


  1. How is the movement of leaves of the sensitive plant different from the movement of a shoot towards light?


  1. How do auxins promote the growth of a tendril around a support?


  1. How does chemical coordination take place in animals? Ans. In animals, endocrine


  1. Why is the use of iodised salt advisable?


  1. How does our body respond when adrenaline is secreted into the blood?