CONTROL & CORDINATION- ASSIGNMENT
- Name the two substances which are responsible for the control and coordination in plants.
- What are Phytohormones? Name any two.
- What is the difference between photoperiodism and phototropism?
- What are nastic movements? Give one example.
- What are the different Hormones found in Plants and their functions?
- What are receptors? What type of receptors detects smell and taste?
- How the information is send to brain in animals?
- What is cranium?
- How are tissues protected in a brain?
- What is role of brain in reflex action?
- What happens at the synapse between two neurons?
- What is stimulus?
- What are the different types of nervous systems found in human body? Mention the functions of each.
- Draw the schematic diagram of reflex arc. Define reflex action with suitable example.
- Draw the labeled structure of human brain.
- What are the four main parts of the fore brain? Give the function of each part.
- What are the three parts of the mid brain and their functions?
- Which part of the human brain is responsible for: Intelligence and Memory, Adjustment movement and Posture, Smell?
- Give the role of Frontal lobe, temporal, lobe and medulla oblongata.
- Name the different lobes found in the fore brain and give their functions.
- What is geotropism?
- What are plant hormones?
- What are controlled movements? How this process happens?
- What are electrical impulses? What re its limitations?
- How the stimulated cells overcome the limitations of electrical impulses?
- How do auxins promote the growth of a tendril around a support?
- Which hormone is responsible for the wilting of leaves in plants?
- What are hormones? Who coined the term hormones?
- What is function of adrenaline? Explain briefly?
- Why diabetes is happen? What is insulin?
- Draw the diagram showing endocrine glands in a male body/female body and label: Pituitary, Thyroid, Adrenal, Testis/ovaries, Thalamus, and Hypothalamus.
- Name the hormone associated with a) Reduction of blood glucose in the body b) Overall metabolism of the body.
- Write the function of testes & ovaries.
- What is function of pituitary gland?
- What is need of control and coordination in the body?
- Which is the structural and functional unit of nervous system? Describe with the help of a diagram.
- “Nervous and the hormonal system together perform the function of the control and coordination in the humans”. Justify.
Control and Coordination ImpQ 01
Control and Coordination ImpQ 01 CBSE Question Bank on HOTS and other Important Questions for class 10 Science and Technology.
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Control and Coordination ImpQ 02
Control and Coordination ImpQ 02 CBSE Question Bank on HOTS and other Important Questions for class 10 Science and Technology.
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1. What is reflex action? Explain with an example along with the diagram of the stated example. Define reflex arc.
A. It is an accurate, unconscious, involuntary and instantaneous response to a stimulus.
e.g.: Hand is withdrawn on being picked.
The pathway taken by a stimulus to travel from receptor organ to effector organ is known as reflex arc.
Schematic pathway:
STIMULUS------->RECEPTOR ORGAN-----(sensory neuron)----->SPINAL CORD---(motor neuron)----->EFFECTOR ORGAN------->RESPONSE
See text book for diagram.
2. Distinguish between nastic and tropic movement?
-----------NASIC--------------------------TROPIC-----------
1. Growth is not involved.--------1. Growth is involved.
2. Movement is not directional.-2. Movement is directional.
3. Stimulus is diffused.------------3. Stimulus is unilateral.
3. How is hormone secretion is regulated by feedback means?
A. Feedback system is a regulatory mechanism in which presence of certain level of substance promotes or inhibits its further formation.
e.g.: Regulation of thyroxine production by its concentration in blood.
Concentration is detected by hypothalamus of brain. If its low the information from hypothalamus moves o pituitary. The pituitary sends information to the thyroid through blood. Then thyroid gland secretes more thyroxine.
If thyroxine in blood is excess hypothalamus stops producing information to pituitary and pituitary stops producing information to thyroid gland to secrete thyroxine.
4. What is the role of brain in reflex action?
A. the reflex action in which spinal cord is involved, brain acts as the information collecting centre. But in some other reflexes such as salivation at the site or smell of food, closing of eyes in bright light the brain acts as the relay centre transferring impulse from sensory to motor neuron.
5. What’s the role of control and coordination in an organism?
A. Multicellular organisms consists of a number of components i.e. organs or tissues, each specialised to perform a particular function.
Most activities need simultaneous and sequential functioning of number of organs e.g. feeding- 1. Eyes locate food. 2. Nose smells it. 3. Hands pick up food 4. Mouth opens to receive food 5. Teeth and muscle masticates food. 6. Saliva moistens the food. 7. Tongue perceives taste and pushes crushed food. All these work is possible through a system of control and coordination.
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