Ch.10 Muscle Organ

Question 1

Concentric

Answer 1

muscle shortens (e.g. biceps shortening when lifting grocery bags)

Question 2

Eccentric

Answer 2

muscle lengthens (greatest chance for injury like pulling a muscle)

Question 3

Isometric

Answer 3

muscle length stays the same (good for stretching)

Question 4

Skeletal

Answer 4

attached to skeleton, voluntary, striated, and multinucleated

Question 5

Cardiac

Answer 5

found in heart, involuntary, striated, usually uninucleated, and intercalated discs with gap junctions for cell communication to coordinate heart beat

Question 6

Smooth

Answer 6

found in organ systems such as respiratory, digestive, urinary, reproductive
systems, and blood vessels, involuntary, not striated (smooth appearance),
uninucleated, and desmin intermediate filaments used for contraction

Question 7

Inferior, Medial, Superior, and Lateral rectus

Answer 7

moves eyeball in direction according to its name

Question 8

Inferior oblique

Answer 8

eyeball rolls up

Question 9

Superior oblique

Answer 9

eyeball rolls down

Question 10

Shoulder Girdle (SITS)

Answer 10

Supraspinatus, Infraspinatus, Teres minor, & Subscapularis

Question 11

Gastrocnemius

Answer 11

plantar flexion or ankle extension
Helps pointing the toes and is involved in movement like walking, running, and jumping.

Question 12

Soleus