Chapter - 7
Control And Coordination
āύিāϝ়āύ্āϤ্ā§°āĻŖ āĻā§°ু āϏāĻŽāύ্āĻŦāϝ়
EXERCISES:-
āĻŦ্ā§াā§াāĻŽ:-
1. Which of the following is a plant hormone?
ā§§/ āϤāϞ⧰ āĻোāύāĻো āĻāĻĻ্āĻিāĻĻ āĻšā§°āĻŽ’āύ?
(a) Insulin (b) Thyroxin (c) Oestrogen (d) Cytokinin.
(āĻ) āĻāύāĻুāϞিāύ (āĻ) āĻĨাāĻā§°āĻ্āϏিāύ (āĻ) āĻāώ্āĻ্ā§°āĻেāύ (āĻ) āĻাāĻāĻ’āĻিāύিāύ।
Answer:-
2. The gap between two neurons is called a
⧍) āĻĻুāĻা āύিāĻā§°āύ⧰ āĻŽাāĻā§° āĻĢাঁāĻāĻোāĻ āĻ āĻŦোāϞা āĻšāϝ়
(a) dendrite. (b) synapse (c)axon. (d) impulse.
(āĻ) āĻĄেāĻŖ্āĻĄ্ā§°াāĻāĻ। (āĻ) āĻিāύেāĻĒ্āϏ (āĻ)āĻāĻ্āϏāύ। (āĻ) āĻāĻŽāĻĒাāϞāĻ।
3. The brain is responsible for
ā§Š/ āĻŽāĻāĻুā§° āĻŦাāĻŦে āĻĻাāϝ়ী
(a) thinking. (b) regulating the heart beat. (c) balancing the body.
(āĻ) āĻিāύ্āϤা āĻā§°া। (āĻ) āĻšৃāĻĻāϏ্āĻĒāύ্āĻĻāύ āύিāϝ়āύ্āϤ্ā§°āĻŖ āĻā§°া। (āĻ) āĻļā§°ীā§°ā§° āĻাā§°āϏাāĻŽ্āϝ ā§°āĻ্āώা āĻā§°া।
(d) all of the above.
(āĻ) āĻāĻĒā§°ā§° āϏāĻāϞোāĻŦোā§°।
Answer:-
4. What is the function of receptors in our body? Think of situations where receptors do not work properly. What problems are likely to arise?
ā§Ē/ āĻāĻŽাā§° āĻļā§°ীā§°āϤ āĻĨāĻা ā§°িāĻেāĻĒ্āĻā§°ā§° āĻাāĻŽ āĻি? āĻāύে āĻĒā§°িāϏ্āĻĨিāϤিā§° āĻāĻĨা āĻাāĻŦি āĻাāĻāĻ āϝ’āϤ ā§°িāĻেāĻĒ্āĻā§°āĻŦোā§°ে āϏāĻ িāĻāĻাā§ąে āĻাāĻŽ āύāĻā§°ে। āĻি āĻি āϏāĻŽāϏ্āϝাā§° āϏৃāώ্āĻি āĻšোā§ąাā§° āϏāĻŽ্āĻাā§ąāύা āĻāĻে?
Answer:-
5. Draw the structure of a neuron and explain its function.
ā§Ģ) āύিāĻā§°āύ⧰ āĻāĻ āύ āĻঁāĻি āϤাā§° āĻাā§°্āϝ্āϝ āĻŦ্āϝাāĻ্āϝা āĻā§°া।
Answer:-
6. How does phototropism occur in plants?
ā§Ŧ) āĻāĻĻ্āĻিāĻĻāϤ āĻĢāĻোāĻ্ā§°āĻĒিāĻāĻŽ āĻেāύেāĻৈ āĻšāϝ়?
Answer:-
7. Which signals will get disrupted in case of a spinal cord injury?
ā§/ āĻŽেā§°ুāĻĻāĻŖ্āĻĄā§° āĻāĻাāϤ⧰ āĻ্āώেāϤ্ā§°āϤ āĻোāύāĻŦোā§° āϏংāĻেāϤāϤ āĻŦ্āϝাāĻাāϤ āĻāύ্āĻŽিāĻŦ?
Answer:-
8. How does chemical coordination occur in plants?
ā§Ž) āĻāĻĻ্āĻিāĻĻāϤ ā§°াāϏাāϝ়āύিāĻ āϏāĻŽāύ্āĻŦāϝ় āĻেāύেāĻৈ āĻšāϝ়?
Answer:-
9. What is the need for a system of control and coordination in an organism?
⧝) āĻāĻা āĻীā§ąāϤ āύিāϝ়āύ্āϤ্ā§°āĻŖ āĻā§°ু āϏāĻŽāύ্āĻŦāϝ়ā§° āĻŦ্āĻ¯ā§ąāϏ্āĻĨাā§° āĻĒ্ā§°āϝ়োāĻāύ āĻি?
Answer:-
10. How are involuntary actions and reflex actions different from each other?
ā§§ā§Ļ) āĻ āύাāĻাংāĻ্āώিāϤ āĻাā§°্āϝ্āϝ āĻā§°ু āĻĒ্ā§°āϤিāĻĢāϞāύ āĻাā§°্āϝ্āϝ āĻāĻোā§ąে āϏিāĻোā§° āĻĒā§°া āĻেāύেāĻৈ āĻĒৃāĻĨāĻ?
Answer:-
11. Compare and contrast nervous and hormonal mechanisms for control and coordination in animals.
ā§§ā§§) āĻীā§ą-āĻāύ্āϤুā§° āύিāϝ়āύ্āϤ্ā§°āĻŖ āĻā§°ু āϏāĻŽāύ্āĻŦāϝ়ā§° āĻŦাāĻŦে āϏ্āύাāϝ়ু āĻā§°ু āĻšā§°āĻŽ’āύ āĻŦ্āĻ¯ā§ąāϏ্āĻĨাā§° āϤুāϞāύা āĻā§°ু āĻŦিāĻĒā§°ীāϤāĻŽুāĻীāϤা āĻā§°া।
Answer:-
12. What is the difference between the manner in which movement takes place in a sensitive plant and the movement in our legs?
⧧⧍) āϏংāĻŦেāĻĻāύāĻļীāϞ āĻāĻĻ্āĻিāĻĻāϤ āϝি āϧ⧰āĻŖā§° āĻāϤিāĻŦিāϧি āĻšāϝ় āĻā§°ু āĻāĻŽাā§° āĻā§°িā§° āĻāϤিāĻŦিāϧিā§° āĻŽাāĻāϤ āĻĒাā§°্āĻĨāĻ্āϝ āĻি?
Answer:-
Type By - Pinku Moni Bora .