Top Questions For Muscular System

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1. What factors determine the rate of contraction of muscle?

Explanation

The rate of muscle contraction is primarily determined by the anatomical arrangement of muscle fibers and the way the muscle attaches to the bone. Factors such as muscle color, room temperature, and clothing do not directly impact the rate of muscle contraction.

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Top Questions For Muscular System - Quiz

Explore the complexities of the muscular system through focused assessment. This educational content enhances understanding of muscle functions, anatomy, and physiology, crucial for students and professionals in health... see moreand sports sciences. see less

2. How can you classify muscles?

Explanation

Muscles can be classified based on their shape, function (action or movement), size, and the range of motion they allow. Other factors like color, smell, taste, temperature, weight, and age do not play a significant role in the classification of muscles.

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3. What are the different types of muscle shapes?

Explanation

Muscles can have various shapes based on their alignment and structure. The correct types of muscle shapes include parallel muscles, pennate muscles, convergent muscles, and circular or sphincter muscles.

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4. What type of muscle has axes of fascicles that run parallel to the axes of the muscle?

Explanation

Parallel muscles have fascicles that run parallel to the muscle's axis, giving them a spindle-shaped or strap-like appearance. When parallel muscles contract, they get smaller in length but larger in diameter, especially at the belly. Examples of parallel muscles include the biceps and sartorius.

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5. What are pennate muscles?

Explanation

Pennate muscles are characterized by their feather-like structure which allows them to generate more tension compared to parallel muscles. The different types of pennate muscles vary based on how the fascicles insert into the central tendon, affecting their function and strength.

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6. What are convergent muscles?

Explanation

Convergent muscles are fan-shaped and not limited to movement in any one direction. They can change directions and pull in various ways due to their design.

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7. What type of muscle contraction acts to close a hole and is arranged in a circular pattern?

Explanation

Circular muscle contractions, like the orbicularis oris and orbicularis occuli, function to close a hole or opening. Linear, spiral, and zigzag patterns do not typically close holes in the same way circular contractions do.

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8. What is the origin in anatomy?

Explanation

In anatomy, the origin refers to the immovable end of a muscle where it attaches to a bone. This is different from the insertion, which is the movable end of the muscle attached to another bone.

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9. What is insertion in relation to muscles?

Explanation

The insertion of a muscle refers to the end that moves when the muscle contracts, typically attaching to a bone to produce movement.

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10. What are the different functional groups of muscles?

Explanation

Muscles work together in different functional groups to produce organized movement. The agonist is the primary muscle responsible for generating movement, while the antagonist opposes the agonist. Synergists help the agonist by stabilizing joints or reducing unnecessary movements, and fixators assist in immobilizing a bone or muscle's origin to create a stable base for movement.

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11. What is an agonist in relation to muscle movement?

Explanation

An agonist is the prime mover responsible for movement, not a muscle that relaxes, stabilizes, or opposes movement.

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12. What is the role of synergists in muscle movements?

Explanation

Synergists help the prime movers by adding extra force to the movement, aiding in more efficient and effective muscle contractions.

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13. What is the function of a fixator in the human body?

Explanation

A fixator functions as a synergist that helps immobilize a bone to provide stability and maintain proper posture. It does not necessarily connect bones in a joint, move body parts away from the midline, or bend joints.

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14. What is a fulcrum?

Explanation

A fulcrum is the fixed point around which a lever system rotates, helping to magnify force. It is an essential component in the function of levers, similar to how joints are crucial in the movement of the human body.

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15. What is an applied force?

Explanation

An applied force is the effort used to move the resistance in the body, similar to muscle contraction. It is not the force exerted by an external source on an object, force applied vertically upward, or the force exerted by an object in motion.

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16. What is the mechanical advantage of a power lever in a lever system?

Explanation

A power lever in a lever system requires less work because the effort arm (distance from fulcrum to input force) is longer than the load arm (distance from fulcrum to the output force), allowing for a small effort over a long distance to move a large load over a small distance. This is commonly seen when lifting a car using a jack.

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17. What is a mechanical disadvantage lever?

Explanation

A mechanical disadvantage lever is one in which the effort arm (distance between the effort and the fulcrum) is shorter than the load arm (distance between the load and the fulcrum), resulting in the need for more force to overcome the load.

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18. What type of lever is characterized by having the resistance, fulcrum, and applied force in that order?

Explanation

In a first-class lever, the resistance, fulcrum, and applied force are in the order of Resistance-Fulcrum-Applied force. This arrangement is seen in examples like a seesaw or scissors and is also observed in the body when lifting your head off your chest. This type of lever provides a mechanical advantage.

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19. What type of lever is a second class lever?

Explanation

In a second class lever, the resistance is in between the fulcrum and the applied force, allowing for greater weight to be lifted with less effort.

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20. What type of lever increases speed and distance but is always a mechanical disadvantage?

Explanation

In a third class lever, the resistance is closer to the fulcrum than the applied force, resulting in an increase in speed and distance but always a mechanical disadvantage.

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21. How can you name a skeletal muscle?

Explanation

When naming a skeletal muscle, factors such as location, shape, position, size, number of origins, location of attachments, direction of muscle fibers and fascicles, and action of the muscle are important to consider. Other factors like color, texture, temperature, weight, blood flow, nerve density, oxygen concentration, flexibility, density, viscosity, elasticity, and conductivity are not typically used in naming skeletal muscles.

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22. What is the location of the sternocleidomastoid muscle?

Explanation

The sternocleidomastoid muscle is located in the neck region, connecting the sternum and clavicle to the mastoid process of the temporal bone.

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23. What is the shape of the deltoid and trapezius muscle?

Explanation

The deltoid and trapezius muscles are shaped to create a triangular structure on the body. This shape allows for movement and support in the upper body.

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24. What is the role of extrinsic and intrinsic muscles in relation to position?

Explanation

Extrinsic muscles are located outside the organ and provide external support, while intrinsic muscles are found within the organ and help maintain its position internally.

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25. What is the correct order of muscle size from largest to smallest?

Explanation

The correct order of muscle size from largest to smallest is maximus, minimus, longus, brevis. This sequence represents the relative size of muscles in descending order.

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26. How many origins are associated with the muscles biceps, triceps, and quadriceps?

Explanation

The muscles biceps, triceps, and quadriceps each have one origin point, making the total number of origins associated with them three.

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27. Where is the location of attachments for the sternocleidomastoid muscle?

Explanation

The attachments for the sternocleidomastoid muscle are located at the origin before insertion, specifically originating from the sternum and clavicle before inserting at the mastoid process of the temporal bone.

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What factors determine the rate of contraction of muscle?
How can you classify muscles?
What are the different types of muscle shapes?
What type of muscle has axes of fascicles that run parallel to the...
What are pennate muscles?
What are convergent muscles?
What type of muscle contraction acts to close a hole and is arranged...
What is the origin in anatomy?
What is insertion in relation to muscles?
What are the different functional groups of muscles?
What is an agonist in relation to muscle movement?
What is the role of synergists in muscle movements?
What is the function of a fixator in the human body?
What is a fulcrum?
What is an applied force?
What is the mechanical advantage of a power lever in a lever system?
What is a mechanical disadvantage lever?
What type of lever is characterized by having the resistance, fulcrum,...
What type of lever is a second class lever?
What type of lever increases speed and distance but is always a...
How can you name a skeletal muscle?
What is the location of the sternocleidomastoid muscle?
What is the shape of the deltoid and trapezius muscle?
What is the role of extrinsic and intrinsic muscles in relation to...
What is the correct order of muscle size from largest to smallest?
How many origins are associated with the muscles biceps, triceps, and...
Where is the location of attachments for the sternocleidomastoid...
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