How does muscle cells change their shape?

The muscle cells move by contraction and relaxation by utilising the energy in the form of ATP. Muscle contraction is initiated by the signal sent by the CNS to the muscle fibres. During contraction the muscle fibres shorten, but during relaxation the muscle fibres come to their normal position. The shape of muscles depends on the ability to adapt to external forces. And also due to the contraction and relaxation of the muscle fibres the length and shape of the cell changes.

What is an endocrine gland? What is the difference between an endocrine and an exocrine gland? Name the gland performs both endocrine as well as exocrine functions.

The glands that are ductless in nature and pour their secretions into the blood. Its target gland is very far, so it is transferred through blood. Example: Pituitary gland releases gonadotropins which stimulate the testes and ovaries. Characteristic Endocrine gland Exocrine gland Type These glands are ductless in nature and pour their secretions into the blood. These glands have ducts to discharge secretions into the body cavities or body surface. Secretions Their secretions include hormones. Secretions from these glands are metabolites or enzymes. The gland that performs both exocrine and endocrine functions is pancreas. It is located in the abdomen and produces enzymes and digestive juices that are essential for breaking down the food we eat.

E M B I B E

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 7 - Control and Coordination>assam board-2018>Q 1

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Earn 100

The part of the brain responsible for the sensation of hunger and thirst is:

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Important Questions on Control and Coordination

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 7 - Control and Coordination>assam board-2018>Q 2

How does nerve impulse travel in our body?

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 7 - Control and Coordination>assam board-2019>Q 3

The part of the brain that controls the posture and equilibrium of our body is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 7 - Control and Coordination>assam board-2019>Q 4

Write any two differences between axon and dendrites.

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 7 - Control and Coordination>assam board-2019>Q 5

What is a hormone? Give an example of a growth-promoting plant hormone. How does the movement of the leaves of a sensitive plant differ from a movement of a shoot towards light?

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 7 - Control and Coordination>assam board-2019>Q 6

What is hydrotropism? How would you demonstrate hydrotropism with the help of an experiment?

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR SCIENCE>Chapter 7 - Control and Coordination>assam board-2020>Q 7

Which of the following disease is caused due to the insufficient secretion of thyroxine hormone ?

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