Exam 2 Muscles Flashcards

Discussing the parts of the muscles for exam 2

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1
Q

what is smooth muscle?

A
  • it lines the walls of hollow viscera; organs like the eye muscles, airways, and larger arteries.
  • Involuntary, in the stomach, bladder and respiratory system

Cell shape and appearance: single, uninucleate, with no striations

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2
Q

What is cardiac muscle?

A

the muscles that line the heart. they are cushioned by connective tissues in a branching pattern.
- contracts regularly due to pacemaker

cell shape and appearance: branching chain of cells, has striations, and is binucleate

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3
Q

What is skeletal muscle?

A

Muscles that attach to bones or in some cases skin.
They: attach to the body’s skeleton, have voluntary movement, and tire easily.
they also provide strength and support; they have tendons that connect the muscles to the bone also

Cell shape and appearance: single, very long and cylindrical, multinucleate cells with obvious striations

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4
Q

Abduction

A

Moving away from the body midline

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5
Q

Adduction

A

Moving towards the body midline

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6
Q

Elevation

A

Moving a body part up

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7
Q

Depression

A

Moving a body part down

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8
Q

Pronation

A

rotating the forearm so the palm is facing backwards or down

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9
Q

Supination

A

Rotating the forearm so the palm is facing forwards or up

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10
Q

Flexion

A

Decreasing the angle between two bones.
(Bending the leg or arm.)

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11
Q

Extension

A

Increasing the angle between two bones

(Strightning the legs or arms from a bent position)

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12
Q
A
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