The Musculoskeletal System

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Questions and Answers

Which system provides form, upright posture, and movement to the human body?

  • Musculoskeletal system (correct)
  • Cardiovascular system
  • Endocrine system
  • Nervous system

What does the term musculoskeletal refer to?

  • Bones and voluntary muscles (correct)
  • Tendons and ligaments
  • Involuntary muscles and bones
  • Cartilage and joints

What is the primary function of muscle tissue?

  • To contract, causing movement (correct)
  • To store nutrients
  • To provide structure
  • To generate heat

Which of the following is a type of muscle tissue?

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

Skeletal muscle is also known as what type of muscle?

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

Which type of muscle attaches to the bones of the skeleton?

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

What is another term for voluntary muscle?

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

What is the role of fascia in muscle structure?

<p>It surrounds every muscle (A)</p> Signup and view all the answers

What is the function of tendons?

<p>To attach muscles to bones (A)</p> Signup and view all the answers

What is the epimysium?

<p>A layer that closely surrounds skeletal muscles (A)</p> Signup and view all the answers

Which layer separates muscles into small compartments?

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

What are muscle fasciculi?

<p>Bundles of skeletal muscle cells (A)</p> Signup and view all the answers

The sarcolemma is the cell membrane surrounding which structure?

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

Actin and Myosin are what?

<p>Types of filaments (D)</p> Signup and view all the answers

What is the function of motor neurons?

<p>To conduct nerve impulses to muscles (D)</p> Signup and view all the answers

What is released at the synapse to enable neurons to communicate?

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

What is the junction between a motor neuron and a muscle fiber called?

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

What causes skeletal muscles to contract?

<p>Organelles binding myosin to actin (B)</p> Signup and view all the answers

What is the main function of ATP in muscle contraction?

<p>To provide energy (D)</p> Signup and view all the answers

Flashcards

Musculoskeletal System

Provides form, upright posture, and movement to the human body.

Types of Muscle Tissue

Skeletal, smooth, and cardiac muscle.

Skeletal Muscle

Attaches to bones, forms muscle mass, and is consciously controlled.

Fascia

Surrounds muscles and may form tendons.

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Epimysium

Connective tissue layer closely surrounding skeletal muscles.

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Perimysium

Separates muscle into small compartments.

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Skeletal Muscle Fiber

A single muscle cell that contracts and relaxes.

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Sarcolemma

Cell membrane surrounding each muscle fiber.

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Sarcomeres

Repeating patterns of striation units in muscle fibrils.

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Neurons

Conduct nerve impulses.

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Motor Neurons

Control effectors, including skeletal muscle.

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Synapse

Functional connection where neurons communicate.

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Neuromuscular Junction

Junction between a motor neuron and a muscle fiber.

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Actin Molecules

Globe-shaped molecules that connect to myosin for muscle contraction.

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Tropomyosin

Blocks actin-myosin interaction.

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Sarcomere

Functional unit of skeletal muscle.

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Nerve Impulse

The impulse that causes muscle contraction.

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Acetylcholine

The neurotransmitter that stimulates skeletal muscle to contract.

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Muscle Contraction

Requires energy to contract; primary source is ATP.

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Oxygen Debt

Develops when a person is exercising strenuously and lactic acid increases.

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