Chapter - 7

Control And Coordination 

āύিāϝ়āύ্āϤ্ā§°āĻŖ āφ⧰ু āϏāĻŽāύ্āĻŦāϝ়

EXERCISES:-

āĻŦ্⧟া⧟াāĻŽ:-

1. Which of the following is a plant hormone?

ā§§/ āϤāϞ⧰ āĻ•োāύāϟো āωāĻĻ্āĻ­িāĻĻ āĻšā§°āĻŽ’āύ?

(a) Insulin          (b) Thyroxin         (c) Oestrogen         (d) Cytokinin.

(āĻ•) āχāύāϚুāϞিāύ     (āĻ–) āĻĨাāχ⧰āĻ•্āϏিāύ        (āĻ—) āχāώ্āϟ্ā§°āϜেāύ          (āϘ) āϚাāχāϟ’āĻ•িāύিāύ।

Answer:-

2. The gap between two neurons is called a

⧍) āĻĻুāϟা āύিāω⧰āύ⧰ āĻŽাāϜ⧰ āĻĢাঁāĻ•āϟোāĻ• āĻ• āĻŦোāϞা āĻšāϝ়

(a) dendrite.          (b) synapse      (c)axon.       (d) impulse.

(āĻ•) āĻĄেāĻŖ্āĻĄ্ā§°াāχāϟ।      (āĻ–) āϚিāύেāĻĒ্āϏ      (āĻ—)āĻāĻ•্āϏāύ।    (āϘ) āχāĻŽāĻĒাāϞāĻ›।

3. The brain is responsible for

ā§Š/ āĻŽāĻ—āϜুā§° āĻŦাāĻŦে āĻĻাāϝ়ী

(a) thinking.             (b) regulating the heart beat.             (c) balancing the body.    

(āĻ•) āϚিāύ্āϤা āϕ⧰া।       (āĻ–) āĻšৃāĻĻāϏ্āĻĒāύ্āĻĻāύ āύিāϝ়āύ্āϤ্ā§°āĻŖ āϕ⧰া।           (āĻ—) āĻļā§°ীā§°ā§° āĻ­াā§°āϏাāĻŽ্āϝ ā§°āĻ•্āώা āϕ⧰া। 

 (d) all of the above.

(āϘ) āĻ“āĻĒā§°ā§° āϏāĻ•āϞোāĻŦোā§°।

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/ āφāĻŽাā§° āĻļā§°ীā§°āϤ āĻĨāĻ•া ā§°িāϚেāĻĒ্āϟ⧰⧰ āĻ•াāĻŽ āĻ•ি? āĻāύে āĻĒā§°িāϏ্āĻĨিāϤিā§° āĻ•āĻĨা āĻ­াāĻŦি āϚাāĻ“āĻ• āϝ’āϤ ā§°িāϚেāĻĒ্āϟ⧰āĻŦোā§°ে āϏāĻ িāĻ•āĻ­াā§ąে āĻ•াāĻŽ āύāϕ⧰ে। āĻ•ি āĻ•ি āϏāĻŽāϏ্āϝাā§° āϏৃāώ্āϟি āĻšোā§ąাā§° āϏāĻŽ্āĻ­াā§ąāύা āφāĻ›ে?

Answer:-

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

ā§Ģ) āύিāω⧰āύ⧰ āĻ—āĻ āύ āφঁāĻ•ি āϤাā§° āĻ•াā§°্āϝ্āϝ āĻŦ্āϝাāĻ–্āϝা āϕ⧰া।

Answer:-

6. How does phototropism occur in plants?

ā§Ŧ) āωāĻĻ্āĻ­িāĻĻāϤ āĻĢāϟোāϟ্ā§°āĻĒিāϜāĻŽ āĻ•েāύেāĻ•ৈ āĻšāϝ়?

Answer:-

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

ā§­/ āĻŽেā§°ুāĻĻāĻŖ্āĻĄā§° āφāϘাāϤ⧰ āĻ•্āώেāϤ্ā§°āϤ āĻ•োāύāĻŦোā§° āϏংāĻ•েāϤāϤ āĻŦ্āϝাāϘাāϤ āϜāύ্āĻŽিāĻŦ?

Answer:-

8. How does chemical coordination occur in plants?

ā§Ž) āωāĻĻ্āĻ­িāĻĻāϤ ā§°াāϏাāϝ়āύিāĻ• āϏāĻŽāύ্āĻŦāϝ় āĻ•েāύেāĻ•ৈ āĻšāϝ়?

Answer:-

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

⧝) āĻāϟা āϜীā§ąāϤ āύিāϝ়āύ্āϤ্ā§°āĻŖ āφ⧰ু āϏāĻŽāύ্āĻŦāϝ়ā§° āĻŦ্āĻ¯ā§ąāϏ্āĻĨাā§° āĻĒ্ā§°āϝ়োāϜāύ āĻ•ি?

Answer:-

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

ā§§ā§Ļ) āĻ…āύাāĻ•াংāĻ•্āώিāϤ āĻ•াā§°্āϝ্āϝ āφ⧰ু āĻĒ্ā§°āϤিāĻĢāϞāύ āĻ•াā§°্āϝ্āϝ āχāϟোā§ąে āϏিāϟোā§° āĻĒā§°া āĻ•েāύেāĻ•ৈ āĻĒৃāĻĨāĻ•?

Answer:-

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

ā§§ā§§) āϜীā§ą-āϜāύ্āϤুā§° āύিāϝ়āύ্āϤ্ā§°āĻŖ āφ⧰ু āϏāĻŽāύ্āĻŦāϝ়ā§° āĻŦাāĻŦে āϏ্āύাāϝ়ু āφ⧰ু āĻšā§°āĻŽ’āύ āĻŦ্āĻ¯ā§ąāϏ্āĻĨাā§° āϤুāϞāύা āφ⧰ু āĻŦিāĻĒā§°ীāϤāĻŽুāĻ–ীāϤা āϕ⧰া।

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 āωāĻĻ্āĻ­িāĻĻāϤ āϝি āϧ⧰āĻŖā§° āĻ—āϤিāĻŦিāϧি āĻšāϝ় āφ⧰ু āφāĻŽাā§° āĻ­ā§°িā§° āĻ—āϤিāĻŦিāϧিā§° āĻŽাāϜāϤ āĻĒাā§°্āĻĨāĻ•্āϝ āĻ•ি?

Answer:-




Type By - Pinku Moni Bora .



Post ID: DABP001673