Muscle - Connective Tissue 4 Flashcards

1
Q

4 main functions of muscle

A

Heat production
Posture
Joint stability
Movement

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2
Q

Importance of muscle tissue

A

Movement
Speaking
Chewing
Controls breathing, heartbeat and digestion
Temperature regulation
Vision

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3
Q

3 types of muscular tissue

A

Skeletal
Smooth
Cardiac

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4
Q

Skeletal

A

Moves bones of skeleton
Striated - alternating light and dark bands under microscope
Consists of parallel, non-branching multi nucleated muscle fibres united together in bundles.
Surrounded by a sheath - the sarcolemma

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5
Q

Skeletal - voluntary or involuntary

A

Voluntary - consciously controlled
Subconsciously to some extent - diaphragm contracts and relaxes with no control

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6
Q

Smooth muscle

A

Located in walls of hollow internal structures - blood vessels, airways etc
Lacks striating on skeletal and cardiac
Usually involuntary
Slow sustained mode of contraction
Spindle shaped cells - one central nucleus
No distinct sarcolemma - fine membrane covers tissue

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7
Q

Function of smooth muscle

A

Moves food down oesophagus
Urine down bladder
Regulates diameter of blood vessels
Controls diameter of respiratory passageways

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8
Q

Cardiac muscle

A

Only found in walls of heart
Striated
Involuntary

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9
Q

Main function of cardiac muscle

A

Involuntary propels blood to and form heart

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