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labwork [276]
3 years ago
5

What do I have to do

Biology
1 answer:
Romashka-Z-Leto [24]3 years ago
4 0
It would help if you had question or attached an image.
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Which of the following chemicals opens us binding sites allowing muscle filaments to connect to each other? Select one:
HACTEHA [7]

Answer:

The correct answer will be option-D.

Explanation:

Calcium plays an important role in muscle contraction as they are released from the sarcoplasmic reticulum after they receive electric impulse.

Calcium triggers the muscle contraction cycle as these calcium ions bind to the troponin-tropomyosin complex. This binding exposes the myosin-binding site on the actin on which high energy myosin binds and cross-bridge is formed.

This cross-bridge formation causes the contraction of the sarcomere and therefore muscle contracts.

Thus, option-D is the correct answer.

3 0
3 years ago
What is the term used for the elements and compounds before a chemical reaction takes place?
alexandr1967 [171]

Explanation:

Before a chemical reaction, the elements and compounds which are about to take part in the reaction are known as reactants.

And, when the chemical reaction takes place between the given elements and compounds then they change into products.

For example, we take sodium and chlorine elements and before any chemical reaction they are the reactants.

But when a chemical reaction takes place between sodium and chlorine then it results into the formation of sodium chloride which is the product.

7 0
3 years ago
Cells in the leaves of plants are adapted to perform photosynthesis. Which of
lara [203]

Answer:

I would say C cell membrane

Explanation:

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3 years ago
Introduced species can threaten biodiversity because they _____
Solnce55 [7]
The answer to this is A
5 0
3 years ago
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At approximately what age should a child be able to use each hand independently?
miv72 [106K]
I think at Approximately 7 years the child should be able to use each hand independently. Hand control is the ability by a child to accurately use and manipulate objects, utensils, tools and even finger in isolation for functional tsak performance. 
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