Question

•Why muscle fibre cannot cause movement but a muscle can?

•How water droplets always role off/ slip of a plant??
(tip:- When rain is there usually water drops role off a plant)

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Answer 1

Answer:

Explanation:

What is Muscle Fibre?

• Muscle Fibre is one of the part of the muscular system .
• Muscular Tissues make up the muscle fibre
• Muscle Cells move by contraction and Relaxation.
• Muscle fibre cannot cause movement as
• It is not directly linked with reflex action
• Skeletal system help in Movement in humans
• Muscles without skeleton is not possible as it is very soft.
• HENCE, Main reason is it needs support of skeleton system for movement of body parts.

Water rolls of a plant as :-

• Epidermis is the outermost layer of a plant
• This makes cuticle , a moist layer
• This prevents fungus attack
• It also helps in Transpiration of plants in Dry season
• We know that every living thing respites
• SO, Plants also respite and give out water that makes plant moist
• And hence the water slides off easily due to low friction as we all know that moist surface produce less friction.

More to know:-

Reflex Reaction

• Conducted via brain
• Nerve cells are responsible for the message delivery
• Whenever we touch a extreme hot or cold thing
• This generates shock waves in our body
• As a result by brain, we are forced to remove contact from the surface.

Answer 2

Answer:

$\bold\longrightarrow\bold{1)}$A muscle is a contractive tissue. A muscle fibre is a type of cell of muscle, by the process of myogenesis these cell fibre or cells are formed these are just the part of the muscle. We know that muscle fibres have striations, nucleus, filaments and myofibrils. On a skeleton muscle there are several layers which helps us to move our hand. In a skeleton muscle the first top layer is the muscle this is a think fat or a top think skin which helps us to put force and pressure and move our hand secondly the muscle fibre is nice the muscle fibre there are blood cells, Sarcomere, Action - myosins. Actually as the muscle is hard and made of think sink it helps us to move our hand easily were as the muscle fibers is the next layer of skeleton muscle.

Refer the attachment for the skeleton muscle diagram.

$\bold\longrightarrow\bold{2)}$Yes, water droplets role down form the leaves this forms due to the dung of the moisture present in the air. And the water slides down the leaves of the plant and there would not be any water droplets on the leaf. In most of the leaves at the top of the left the water flows down or slip away its structure is like a water fall through this drip tip of a leaf the water slip away quickly. The water flows down droplet (dew) form the center of the leaf thought the veins to the drip tip of the leave.

Refer the attachment for the dew on the leaf diagram.