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Biology Chapter 4: Cellular Ions

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Questions and Answers

What is the role of ions in cellular reactions?

Provide organic chemicals for cellular reactions

Make up the majority of the cell mass

Aid in the formation of structural proteins

Are necessary for the operation of cellular control mechanisms (correct)

Which ion is NOT mentioned as an important ion in the cell?

Potassium

Chlorine (correct)

Magnesium

Calcium

In nerve and muscle fibers, what is the role of ions at the cell membrane?

Required for transmission of electrochemical impulses (correct)

Regulate cellular growth

Aid in DNA replication

Help in protein synthesis

What constitutes the majority of the cell mass after water?

Proteins Signup and view all the answers

Which type of proteins are present mainly in the form of long filaments in the cell?

Fibrillar proteins Signup and view all the answers

What is the main function of ions in cellular reactions?

Acting at the cell membrane for transmission of electrochemical impulses Signup and view all the answers

Where are extracellular fibrillar proteins typically found?

In collagen and elastin fibers of connective tissue Signup and view all the answers

What is the primary purpose of structural proteins in the cell?

Forming microtubules for providing cytoskeletons Signup and view all the answers

What role do ions play in the operation of cellular control mechanisms?

Facilitating nerve impulse transmission Signup and view all the answers

Which cellular component do fibrillar proteins contribute to in connective tissues?

Extracellular matrix Signup and view all the answers

How do ions contribute to cellular reactions?

By providing inorganic chemicals for reactions Signup and view all the answers

What is the primary function of intracellular filaments composed of structural proteins?

Providing structural support within the cell Signup and view all the answers

In what way are ions essential for nerve and muscle function?

Stabilizing cell membranes Signup and view all the answers

Which proteins are mainly responsible for forming microtubules in cells?

'Structural' proteins Signup and view all the answers

'Cytoskeletons' in cellular organelles are primarily composed of which type of proteins?