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gregori [183]
3 years ago
12

Which statement best describes a physical change

Biology
1 answer:
saw5 [17]3 years ago
4 0

A change in which no new substance is formed is called a physical change.

Examples: Crushing a can, Melting an ice cube, Boiling water, Breaking glass, Dissolving sugar in water, Shredding paper, and Chopping wood.

All of these examples may involve a change in shape, form, or appearance, but it DOES NOT involve a change in the molecule structure.

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During the _______ phase, the muscle is returning to resting length.
tangare [24]

Answer:

The correct answer is: Eccentric phase.

When talking about movement, we are talking about the activation of muscle fibers in order for this process to happen. In order for this to happen, motor neurons must activate the phases of muscle excitation, contraction and relaxation, so that the sarcomeres, and thus the fibers, can generate movement.

In essence, there are three stages, or phases, to complete muscle movement:   the concentric phase, which is when the muscle fibers are excited and begin the process of contraction. This means the muscle fibers will contract and generate movement, generating a shortening. Then we have the isometric stage, a moment in which there is no longer any more shortening of the muscle fibers, so basically, the movement is held and there is no further contraction, but neither is there relaxation of the muscle fibers. Finally, we have the eccentric phase. This phase is characterized precisely because it is the moment when the muscles begin to return to their resting position.

3 0
3 years ago
Which consist of sperm cells and egg cells?
bearhunter [10]

Answer:

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Featured snippet from the web

gamete. Gametes are an organism's reproductive cells. They are also referred to as sex cells. Female gametes are called ova or egg cells, and male gametes are called sperm. Gametes are haploid cells, and each cell carries only one copy of each chromosome.

Explanation:

4 0
3 years ago
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The right and left hepatic ducts emerge from the right lobe of the liver in the porta hepatis and unite to form the:
dexar [7]

Answer:

common hepatic duct

Explanation:

  • The common hepatic duct is formed by the union of the right and left hepatic ducts emerging out from the right lobe of the liver.
  • The right hepatic duct is responsible for draining bile from the right half of the body whereas the left hepatic duct drains it from the left side of the body. 
  • At the junction of the right and left hepatic duct, the common hepatic duct gets formed which then joins the cystic duct and then the common bile duct is formed. 
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3 years ago
Cytokinesis occurs after _____, but events leading up to it actually begin during _____.
SpyIntel [72]

Answer: C

Explanation:

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A cuckoo may lay its egg in a warbler's nest. The cuckoo's young will displace the warbler's young and will be raised by the war
kherson [118]
Parasitism bc the warbler's young are being displaced which means that the warblers are suffering harm through the loss of their young. 
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