Match the following: Group 'A' Group 'B' (1) Cardiac muscles (a) Always function in pairs. (2) Are brought about by muscles (b) We never feel tired. (3) Pepsin (c) Uncontrolled and painful contraction of muscles. (4) Cramps (d) Chewing movements of jaw. (5) Skeletal muscles (e) Enzyme of the gastic juice.

1 - b : Cardiac muscles are those muscles that never get tired and work throughout one's life. Also, they are involuntary in action. (2) - (d) : The chewing movement of jaw is brought about by muscles of the face, since the muscles are only tissues which are responsible for any kind of movement, can be contraction or relaxation. (3) - (e) : Pepsin is an enzyme found in the gastric juice, and is responsible for the digestion of proteins found in food. (4) -(c) : Cramps are the uncontrolled and painful contraction of muscles, which is caused by dehydration, strenuous exercise or lack of muscle use. (5) - (a) : Skeletal muscles are those muscles which always function in pairs, because they pull in only one direction such as one muscle in a pair contracts, its counterpart then contracts and pulls in the opposite direction to straighten the joint out again. Group 'A' Group 'B' (1) Cardiac muscles (b) We never feel tired. (2) Are brought about by muscles. (d) Chewing movements of jaw. (3) Pepsin (e) Enzyme of the gastric juice. (4) Cramps (c) Uncontrolled and painful contraction of muscles. (5) Skeletal muscles (a) Always function in pairs.

Who is telling a lie? Organ Statement 1. Tongue My taste-buds can tell only a sweet taste. 2. Liver I am the largest gland in the body. 3. Large intestine I am 7.5 meter long. 4. Appendix Digestion is impossible without me. 5. Lung I play an important role in excretion.

The tongue, the large intestine and the appendix are lying, as explained below: The tongue is lying because it can taste salt, sweet, and bitter tastes. The liver is actually the largest gland in the body, so it is telling the truth. The large intestine is lying because its actual length is 1.5 meters long. The appendix is a vestigial organ and does not play any role in the process of digestion. Lungs play an important role in excretion, as lungs eliminate carbon dioxide and water vapour by the process of exhalation. Hence, lungs are telling truth.

E M B I B E

General Science Standard Seven>Chapter 12 - The Muscular System and Digestive System in Human>Can you tell?>Q 1

MEDIUM

7th Maharashtra Board

IMPORTANT

Earn 100

How do muscles perform their functions?

Important Questions on The Muscular System and Digestive System in Human

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7th Maharashtra Board

IMPORTANT

General Science Standard Seven>Chapter 12 - The Muscular System and Digestive System in Human>Use your brain power?>Q 1

What would happen if: The cardiac muscles do not move.

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7th Maharashtra Board

IMPORTANT

General Science Standard Seven>Chapter 12 - The Muscular System and Digestive System in Human>Use your brain power?>Q 1

What would happen if: Food enters the stomach and stomach muscles do not move.

HARD

7th Maharashtra Board

IMPORTANT

General Science Standard Seven>Chapter 12 - The Muscular System and Digestive System in Human>Let's recall>Q 1

What happens to the food we eat, inside our body?

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7th Maharashtra Board

IMPORTANT

General Science Standard Seven>Chapter 12 - The Muscular System and Digestive System in Human>Let's recall>Q 2

Does the food that we eat mix as it is with the blood?

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7th Maharashtra Board

IMPORTANT

General Science Standard Seven>Chapter 12 - The Muscular System and Digestive System in Human>Use your brain power!>Q 1

During digestion, does all the food that we have eaten get converted into useful, nutritive substances?

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7th Maharashtra Board

IMPORTANT

General Science Standard Seven>Chapter 12 - The Muscular System and Digestive System in Human>Exercise>Q 1

Pushing forward the food that has been chewed is the function of the _____ (stomach/oesophagus).

HARD

7th Maharashtra Board

IMPORTANT

General Science Standard Seven>Chapter 12 - The Muscular System and Digestive System in Human>Exercise>Q 2

Match the following:

Group 'A'	Group 'B'
(1) Cardiac muscles	(a) Always function in pairs.
(2) Are brought about by muscles	(b) We never feel tired.
(3) Pepsin	(c) Uncontrolled and painful contraction of muscles.
(4) Cramps	(d) Chewing movements of jaw.
(5) Skeletal muscles	(e) Enzyme of the gastic juice.

MEDIUM

7th Maharashtra Board

IMPORTANT

General Science Standard Seven>Chapter 12 - The Muscular System and Digestive System in Human>Exercise>Q 3

Who is telling a lie?

Organ	Statement
1. Tongue	My taste-buds can tell only a sweet taste.
2. Liver	I am the largest gland in the body.
3. Large intestine	I am 7.5 meter long.
4. Appendix	Digestion is impossible without me.
5. Lung	I play an important role in excretion.

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