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Muscle Tissue and Its Functions

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Questions and Answers

What is the primary function of muscle tissue?

It stores energy in the form of fat.

It produces movement and maintains body position. (correct)

It provides insulation for the body.

It is responsible for respiratory gas exchange.

What is the basic structural unit of a muscle known as?

Tendon

Myofibril

Sarcomere (correct)

Fibroblast

Which of the following statements about myofibrils is correct?

Myofibrils are only found in cardiac muscle.

Myofibrils exist within muscle cells and are contractile threads. (correct)

Myofibrils can contract independently of muscle cells.

Myofibrils are responsible for generating heat in muscle.

Which of the following describes a function of muscle besides movement?

Temperature regulation Signup and view all the answers

What percentage of a person's weight is constituted by muscle?

40% Signup and view all the answers

Which type of lever system is primarily responsible for increasing the speed of a movement?

Third Order Lever Signup and view all the answers

What provides the chemical energy for muscle cell actions?

Adenosine Triphosphate (ATP) Signup and view all the answers

Which of the following is not a function of muscle tissue?

Photosynthesis Signup and view all the answers

Study Notes

Muscle Tissue

Muscle tissue makes up 40% of a person's weight
Muscle tissue is made up of muscle cells, which consist of myofibrils
Myofibrils are the contractile threads of muscle
Myofibrils extend from one end of the muscle fiber to the other
The sarcomere is the basic structural unit of a muscle
Sarcomeres are composed of long fibrous proteins that slide past each other, creating dark and light bands under a microscope
Muscle cells convert chemical energy in the form of Adenosine Triphosphate (ATP) to fuel their actions
ATP is derived from the metabolism of food into chemical energy

Functions of Muscle

Posture/Muscle Tone
Stability
Mobility/Movement
Circulation
Respiration
Digestion
Temperature Regulation/Heat Production
Organ Protection
Urination

Movement

Lever systems are the coordination of bones and muscles to create movement
Lever systems have two main functions:
- To generate muscular effort to overcome a given load
- To increase the speed of a given movement

Types of Levers

First-order lever
Second-order lever
Third-order lever

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Description

This quiz explores the essential aspects of muscle tissue, including its composition, basic structure, and various functions in the human body. Understanding how muscle cells generate movement and maintain bodily functions is key to appreciating muscle physiology. Test your knowledge on the role of muscle tissue in health and movement.