Exam 2 Muscles

Question 1

what is smooth muscle?

Answer 1

• 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

Question 2

What is cardiac muscle?

Answer 2

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

Question 3

What is skeletal muscle?

Answer 3

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

Question 4

Abduction

Answer 4

Moving away from the body midline

Question 5

Adduction

Answer 5

Moving towards the body midline

Question 6

Elevation

Answer 6

Moving a body part up

Question 7

Depression

Answer 7

Moving a body part down

Question 8

Pronation

Answer 8

rotating the forearm so the palm is facing backwards or down

Question 9

Supination

Answer 9

Rotating the forearm so the palm is facing forwards or up

Question 10

Flexion

Answer 10

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

Question 11

Extension

Answer 11

Increasing the angle between two bones

(Strightning the legs or arms from a bent position)