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Andru [333]
3 years ago
8

When the body is attacked by a foreign substance, the ____ defenses are the first to react.

Biology
1 answer:
natima [27]3 years ago
7 0

B lymphocyte is the answer

 


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What is the function of the organs of the digestive system
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Answer:

The digestive system is a collection of organs that work together to digest and absorb food. Digestion is the process your body uses to break the foods you eat down into molecules your body can use for energy and nutrients. The following organs work together to help your body process the foods you eat.

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Organisms have a code found in nucleic acids that stores and transmits genetic information. This code is called the genetic code
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Deoxyribonucleic acid (DNA)
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The area of the muscle fiber where the actin and myosin myofilaments overlap is
Varvara68 [4.7K]

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Sarcomere

Explanation:

The muscle fiber / myofibrils consist of 2 types of filaments - actin and myosin. The myosin filaments are thick filament whereas the actin filaments are the thin filament.

In addition to this, the muscles have A-band and I-bands. These bands give the muscles alternate light and dark colour band structure. In the A-band, myosin filaments are present, whereas in the I - band the actin filaments are found.

In I-band 2 Z-lines are located.  The area between the Z-lines is called sarcomere. In this sarcomere region both actin and myosin filaments present.

When muscles get contracted the length of the sarcomere shorten. The actin and myosin filaments overlap in this area. A cross-bridge form between them, with the help of filamentous protein titin.

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3 years ago
Rank the buoyant forces supplied by the atmosphere on the following, from greatest to least: a. An elephant b. A helium-filled p
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a >c > b.

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The buoyant force may be defined as the force that mainly opposes the immersed object weight. The buoyant force is greater at the bottom and acts on upward direction.

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Thus, the answer is a >c > b.

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