Lab Exam 2: Muscles

Question 1

What are the muscle tissues?

Answer 1

skeletal Muscle
smooth muscle
cardiac muscle

Question 2

what are the parts of nervous tissue?

Answer 2

Nucleus
cell body
dendrites
axon

Question 3

What does skeletal muscle do?

Answer 3

moves the skeleton

Question 4

what does smooth muscle do?

Answer 4

moves the organs

Question 5

what does cardiac muscle do?

Answer 5

contracts the heart

Question 6

Describe skeletal muscle tissue

Answer 6

Obvious striations (cross-hatched pattern)

multiple nucleated nuclei

Question 7

Describe smooth muscle tissue

Answer 7

not striated

spindle shaped cells

elongated nuclei

adipose + epithelial tissue surrounds

Question 8

Describe cardiac muscle tissue

Answer 8

less obvious striations

cell is smaller in diameter

larger, oval-shaped nuclei

Branching - pockets between branching fibers

Question 9

Why is subscapularis not visible in posterior view of scapula?

Answer 9

It can only be seen in the anterior view of the body

Question 10

What are the superficial muscles of the anterior view of the forearm

Answer 10

brachioradialis

flexor carpi ulnaris

palmaris longus

flexor carpi radialis

Question 11

where would flexor digitorum superficialis be located on superficial, anterior view of forearm?

Answer 11

flexor digitorum superficialis would be deep to the superficial muscles of the anterior forearm

Question 12

what is unique about the structure of flexor digitorum superficialis?

Answer 12

It has multiple tendons that extend into the digits

Question 13

what muscle is deep to rectus femoris?

Answer 13

Vastus intermedius

Question 14

where do the quadriceps (vastus lateralis, vastus intermedius, & vastus medialis) originate

Answer 14

on the femur

Question 15

which quadricep does not originate on the femur?

Answer 15

rectus femoris

Question 16

where does rectus femoris originate

Answer 16

anterior inferior iliac spine

Question 17

what does the origin point of rectus femoris allow it to do

Answer 17

flex the thigh, extend the leg

Question 18

what motion at what joint would all of the adductor muscles of the thigh all be capable of doing?

Answer 18

adduct and laterally rotate the thigh at the hip joint.

Question 19

what is the orientation of the muscle fibers of external abdominal oblique if looking at left anterior view of body

Answer 19

High lateral to low medial

Question 20

what is the orientation of the muscle fibers of internal abdominal oblique if looking at left anterior view of body

Answer 20

high medial to low lateral

Question 21

what is the orientation of the muscle fibers of transverse abdominis

Answer 21

horizontal from medial to lateral

Question 22

what is the orientation of the muscle fibers of rectus abdominis

Answer 22

vertical

Question 23

what is the primary function of the masseter?

Answer 23

elevates and protracts the mandible

Question 24

what is the primary function of the sternocleidomastoid?

Answer 24

one: rotates and extends neck
both: flex the neck

Question 25

based on orientation of the fibers, what are the functions of rectus abdominis

Answer 25

flexes vertebral column compresses abdominal wall

Question 26

based on orientations of the fibers, what are the functions of external abdominal oblique

Answer 26

compresses abdominal wall laterally rotates trunk

Question 27

based on orientations of the fibers, what are the functions of internal abdominal oblique

Answer 27

compresses abdominal wall laterally rotates trunk

Question 28

based on orientations of the fibers, what are the functions of transverse abdominis

Answer 28

compresses abdominal wall laterally rotates trunk

Question 29

On what side of the forearm can you find the flexor muscles

Answer 29

anterior side

Question 30

on what side of the forearm can you find the extensor muscles

Answer 30

posterior

Question 31

what muscle underlies the scapula

Answer 31

subscapularis

Question 32

what are the erector spinae muscles

Answer 32

spinalis longissimus iliocostalis

Question 33

what type of motion do the erector spinae muscles perform when contracted

Answer 33

extends and rotates vertebral column and head

Question 34

what major group of muscles is visible on posterior view of thigh

Answer 34

hamstrings

Question 35

what 2 major groups of muscles are visible on the anterior view of the thigh

Answer 35

quadriceps adductors

Question 36

where is soleus located

Answer 36

deep to gastrocnemius

Question 37

what tendon is shared by soleus and the muscle overlying it

Answer 37

Achilles tendon