Skeletal Muscle Cells: Appearance and Structure
40 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

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?

<p>Presence of sarcomeres. (A)</p> Signup and view all the answers

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

<p>By observing the visible banding that makes them look striped. (A)</p> Signup and view all the answers

What is the shape of skeletal myocytes?

<p>Fibre-like (B)</p> Signup and view all the answers

What are the visible bands along muscle fibres called?

<p>Sarcomeres (C)</p> Signup and view all the answers

What is responsible for muscle contraction?

<p>Sarcomeres (C)</p> Signup and view all the answers

Why do skeletal myocytes have a striated appearance?

<p>Due to the sarcomeres (B)</p> Signup and view all the answers

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

<p>Due to their shape (D)</p> Signup and view all the answers

Skeletal myocytes are wide but relatively short.

<p>False (B)</p> Signup and view all the answers

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

<p>False (B)</p> Signup and view all the answers

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

<p>False (B)</p> Signup and view all the answers

Skeletal myocytes are multinucleated.

<p>True (A)</p> Signup and view all the answers

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

<p>False (B)</p> Signup and view all the answers

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

<p>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</p> Signup and view all the answers

Match the following components with their functions in skeletal myocytes:

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

Match the following features with their descriptions in skeletal myocytes:

<p>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</p> Signup and view all the answers

Match the following terms with their definitions in skeletal myocytes:

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

Match the following characteristics with their effects on skeletal myocytes:

<p>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</p> Signup and view all the answers

To which structure are skeletal muscles usually attached through?

<p>Tendons (C)</p> Signup and view all the answers

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

<p>Striated appearance (A)</p> Signup and view all the answers

What gives skeletal myocytes their distinct stripe-like appearance?

<p>Banding pattern of myosin and actin filaments (A)</p> Signup and view all the answers

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

<p>Organization of sarcomeres (A)</p> Signup and view all the answers

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

<p>Allows for rapid contraction and relaxation (A)</p> Signup and view all the answers

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

<p>Tendons (D)</p> Signup and view all the answers

How are most skeletal muscles attached to bones?

<p>By tendons at both ends (C)</p> Signup and view all the answers

Which term describes the voluntary control of skeletal muscles?

<p>Voluntary (C)</p> Signup and view all the answers

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

<p>They can perform voluntary actions without conscious thought (B)</p> Signup and view all the answers

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

<p>Partially involuntary (C)</p> Signup and view all the answers

What is the point of origin of a muscle?

<p>The more stable site that does not move much when the muscle contracts (B)</p> Signup and view all the answers

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

<p>It is pulled upwards (C)</p> Signup and view all the answers

What is the point of insertion of the gastrocnemius muscle?

<p>The calcaneal tuberosity (D)</p> Signup and view all the answers

What is the result of the gastrocnemius muscle contracting?

<p>The knee is flexed and the tarsus is extended (A)</p> Signup and view all the answers

What is the function of the gastrocnemius muscle contraction?

<p>To propel the animal forward (D)</p> Signup and view all the answers

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

<p>False (B)</p> Signup and view all the answers

The gastrocnemius muscle only flexes the knee when it contracts.

<p>False (B)</p> Signup and view all the answers

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

<p>False (B)</p> Signup and view all the answers

Muscles have only one point of attachment to bones.

<p>False (B)</p> Signup and view all the answers

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

<p>False (B)</p> Signup and view all the answers

More Like This

7-iskelet kasi2
55 questions

7-iskelet kasi2

GladBigfoot avatar
GladBigfoot
Anatomie du muscle squelettique
37 questions
Human Anatomy and Physiology Quiz
42 questions
Skeletal Muscle Structure and Function
16 questions
Use Quizgecko on...
Browser
Browser