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Dmitrij [34]
1 year ago
12

An increase in the calcium ion level in the sarcoplasm starts the sliding of the thin filaments. When the level of calcium ions

declines, what happens to the sarcoplasm?
Biology
1 answer:
Scilla [17]1 year ago
8 0

Answer:

When the level of calcium ions declines the sarcoplasm stops the sliding.

Explanation:

Sarcoplasm can be described as the cytoplasm for the cells of muscles. It contains important structures such as the myofibrils.

The following steps would occur when the level of calcium ions would decline:

The sarcoplasm would stop the sliding of the thin filaments.

The actin filaments would be migrated in the M line

This would lead the bands in the I region to shorten.

The Z region would compress.

The H region would diminish.

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Answer:

A XY or XY gamete fuses with a normal gamete (X or Y)

Explanation:

Meiotic nondisjunction is the phenomenon whereby chromosomes fail to separate during meiosis I or II. Meiotic nondisjunction leads to the formation of abnormal gametes I.e. gametes with additional or missing chromosomal piece.

The fusion of these abnormal gametes produced by nondisijuction with a normal gamete (X or Y chromosome). This leads to a condition called ANEUPLOIDY, which is a chromosomal disorder. In the case od Calix, XXY is an ANEUPLOIDY state that could have resulted because there was a fusion between a XX gamete and Y gamete or XY and X. The XY or XX gametes are produced as a result of nondisijuction.

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