Skeletal Muscle Cells: Appearance and Structure

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Why do skeletal myocytes (muscle cells) have a fibre-like appearance?

They are round and short.

They are narrow and short.

They are wide and short.

They are narrow but relatively long. (correct)

What gives skeletal myocytes their striped appearance?

Connecting to other muscle cells.

Having a smooth surface texture.

Being transparent in nature.

Visible banding along the muscle fibres called sarcomeres. (correct)

What is the main reason for the series of bands visible along muscle fibres?

Staining applied to the cells.

Sarcomeres, causing muscle contraction. (correct)

Presence of only one type of protein.

Lack of any organelles in the fibres.

Which characteristic is responsible for the striated appearance of skeletal myocytes?

Presence of sarcomeres. Signup and view all the answers

How can you distinguish skeletal myocytes from other cell types by their appearance?

By observing the visible banding that makes them look striped. Signup and view all the answers

What is the shape of skeletal myocytes?

Fibre-like Signup and view all the answers

What are the visible bands along muscle fibres called?

Sarcomeres Signup and view all the answers

What is responsible for muscle contraction?

Sarcomeres Signup and view all the answers

Why do skeletal myocytes have a striated appearance?

Due to the sarcomeres Signup and view all the answers

What is the reason for the fibre-like appearance of skeletal myocytes?

Due to their shape Signup and view all the answers

Skeletal myocytes are wide but relatively short.

False Signup and view all the answers

Sarcomeres are the part of the muscle cell responsible for muscle relaxation.

False Signup and view all the answers

The striped appearance of skeletal myocytes is due to the presence of multiple nuclei.

False Signup and view all the answers

Skeletal myocytes are multinucleated.

True Signup and view all the answers

The fibre-like shape of skeletal myocytes is due to the striated appearance.

False Signup and view all the answers

Match the following characteristics with the corresponding features of skeletal myocytes:

Multinucleated = Having multiple nuclei Fibre-like shape = Being narrow but relatively long Striated = Having visible bands (sarcomeres) Relatively short = Not a characteristic of skeletal myocytes Signup and view all the answers

Match the following components with their functions in skeletal myocytes:

Sarcomeres = Causing muscle contraction Nuclei = Control center of the cell Myofibrils = Not mentioned in the text Fibre-like shape = Giving a fibre-like appearance Signup and view all the answers

Match the following features with their descriptions in skeletal myocytes:

Striped appearance = Due to visible bands (sarcomeres) Fibre-like shape = Due to being narrow but relatively long Multiple nuclei = A characteristic of skeletal myocytes Short and wide = Not a characteristic of skeletal myocytes Signup and view all the answers

Match the following terms with their definitions in skeletal myocytes:

Sarcomeres = Visible bands along muscle fibres Fibre-like shape = Narrow but relatively long shape Multinucleated = Having multiple nuclei Muscle contraction = Caused by sarcomeres Signup and view all the answers

Match the following characteristics with their effects on skeletal myocytes:

Having multiple nuclei = Being multinucleated Visible bands (sarcomeres) = Giving a striated appearance Being narrow but relatively long = Giving a fibre-like appearance Being wide but relatively short = Not a characteristic of skeletal myocytes Signup and view all the answers

To which structure are skeletal muscles usually attached through?

Tendons Signup and view all the answers

What is the primary reason for the spindle-like appearance of skeletal myocytes?

Striated appearance Signup and view all the answers

What gives skeletal myocytes their distinct stripe-like appearance?

Banding pattern of myosin and actin filaments Signup and view all the answers

Which feature contributes most to the series of visible bands seen along muscle fibres?

Organization of sarcomeres Signup and view all the answers

Why is the striated appearance of skeletal myocytes essential for their function?

Allows for rapid contraction and relaxation Signup and view all the answers

What term is used to describe the attachment of skeletal muscles to bones?

Tendons Signup and view all the answers

How are most skeletal muscles attached to bones?

By tendons at both ends Signup and view all the answers

Which term describes the voluntary control of skeletal muscles?

Voluntary Signup and view all the answers

In what way are skeletal muscles under 'cruise control'?

They can perform voluntary actions without conscious thought Signup and view all the answers

Which phrase best describes the relationship between skeletal muscles and conscious control?

Partially involuntary Signup and view all the answers

What is the point of origin of a muscle?

The more stable site that does not move much when the muscle contracts Signup and view all the answers

What happens to the calcaneal tuberosity when the gastrocnemius muscle contracts?

It is pulled upwards Signup and view all the answers

What is the point of insertion of the gastrocnemius muscle?

The calcaneal tuberosity Signup and view all the answers

What is the result of the gastrocnemius muscle contracting?

The knee is flexed and the tarsus is extended Signup and view all the answers

What is the function of the gastrocnemius muscle contraction?

To propel the animal forward Signup and view all the answers

The point of origin of a muscle is the more movable attachment site.

False Signup and view all the answers

The gastrocnemius muscle only flexes the knee when it contracts.

False Signup and view all the answers

The point of insertion of the gastrocnemius muscle is on the femur.

False Signup and view all the answers

Muscles have only one point of attachment to bones.

False Signup and view all the answers

The contraction of the gastrocnemius muscle only moves the calcaneal tuberosity.

False Signup and view all the answers

Skeletal Muscle Cells: Appearance and Structure

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Questions and Answers

Why do skeletal myocytes (muscle cells) have a fibre-like appearance?

What gives skeletal myocytes their striped appearance?

What is the main reason for the series of bands visible along muscle fibres?

Which characteristic is responsible for the striated appearance of skeletal myocytes?

How can you distinguish skeletal myocytes from other cell types by their appearance?

What is the shape of skeletal myocytes?

What are the visible bands along muscle fibres called?

What is responsible for muscle contraction?

Why do skeletal myocytes have a striated appearance?

What is the reason for the fibre-like appearance of skeletal myocytes?

Skeletal myocytes are wide but relatively short.

Sarcomeres are the part of the muscle cell responsible for muscle relaxation.

The striped appearance of skeletal myocytes is due to the presence of multiple nuclei.

Skeletal myocytes are multinucleated.

The fibre-like shape of skeletal myocytes is due to the striated appearance.

Match the following characteristics with the corresponding features of skeletal myocytes:

Match the following components with their functions in skeletal myocytes:

Match the following features with their descriptions in skeletal myocytes:

Match the following terms with their definitions in skeletal myocytes:

Match the following characteristics with their effects on skeletal myocytes:

To which structure are skeletal muscles usually attached through?

What is the primary reason for the spindle-like appearance of skeletal myocytes?

What gives skeletal myocytes their distinct stripe-like appearance?

Which feature contributes most to the series of visible bands seen along muscle fibres?

Why is the striated appearance of skeletal myocytes essential for their function?

What term is used to describe the attachment of skeletal muscles to bones?

How are most skeletal muscles attached to bones?

Which term describes the voluntary control of skeletal muscles?

In what way are skeletal muscles under 'cruise control'?

Which phrase best describes the relationship between skeletal muscles and conscious control?

What is the point of origin of a muscle?

What happens to the calcaneal tuberosity when the gastrocnemius muscle contracts?

What is the point of insertion of the gastrocnemius muscle?

What is the result of the gastrocnemius muscle contracting?

What is the function of the gastrocnemius muscle contraction?

The point of origin of a muscle is the more movable attachment site.

The gastrocnemius muscle only flexes the knee when it contracts.

The point of insertion of the gastrocnemius muscle is on the femur.

Muscles have only one point of attachment to bones.

The contraction of the gastrocnemius muscle only moves the calcaneal tuberosity.

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