Answer all the questions In a muscle cell: O there are many nuclei and the sarco

Question

Answer all the questions

In a muscle cell: O there are many nuclei and the sarcoplasm contains abundant mitochondria O the sarcolemma stores Ca2+ ions the sarcoplasmic reticulum makes myofilaments 6 Which is true? O Myofilaments are protiens O Myofibers are organelles Myofibrils are cells 7 Sodium (Na+) is more concentrated outside of cells than inside cells. What would happen if the cell membrane permeability to sodium suddenly changed? O Sodium rushes into the cell passively (net inward movement) Sodium rushes out of the cell passively (net movement outward) O Nothing sodium still does not cross the cell membrane

Explanation / Answer

1. In muscle cell there are many nuclei and the sarcoplasm to contain abundant mitochondria. Sarcolemma function is to make barrier not calcium ion. Myofilaments are made up of protein. Option 1 is true

2. Myofilaments are protein because they are made up of proteins , hence it is true rest of two is false because myofibres are cell.

3. As a rule of thumb solute move from higher concentration to lower concentration hence sodium ions move inside the cell. Hence your first option is correct

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