Muscles

Question 1

Biceps brachii

Answer 1

Origin: scapula, insertion: radial tuberosity

Question 2

Triceps brachii

Answer 2

Origin: scapula and humerus, insertion: olecranon process of ulna (elbow)

Question 3

Deltoid

Answer 3

Origin: scapula and clavicle, insertion: deltoid tuberosity

Question 4

Psoas major

Answer 4

Origin: lumbar vertebrae, insertion: femur

Question 5

Illiacus

Answer 5

Origin: iliac fossa, insertion: femur

Question 6

Gluteus Maximus

Answer 6

Origin: ilium and sacrum, insertion: femur

Question 7

Rectus femoris

Answer 7

Origin: ilium, insertion: tibial tuberosity

Question 8

Vastus medialis, intermedium, lateralis

Answer 8

Origin: femur, insertion: tibial tuberosity

Question 9

Biceps femoris

Answer 9

Origin: ischium and femur, insertion: fibula

Question 10

Semimembranosus and semitendinosus

Answer 10

Origin: ischium, insertion: tibia

Question 11

Tibias anterior

Answer 11

Origin: tibia, insertion: tarsals

Question 12

Gastrocnemius

Answer 12

Origin: condyles of femur femur, insertion: calcaneus via calcaneal tendon

Question 13

Soleus

Answer 13

Origin: tibia and fibula, insertion: calcaneus via Achilles tendon

Question 14

Tension determiners

Answer 14

Length, number, and arrangement of muscle fibers

Question 15

Parallel fiber arrangement

Answer 15

Vertically between tendons/attachments, smaller CSA greater shortening

Question 16

Pennate muscle fibers

Answer 16

Obliquely arranged, greater CSA, lesser shortening. Uni-pennate, bi-pennate, multi-pennate

Question 17

How does hip allow us to stand?

Answer 17

Capsular anterior ligaments are taut and gravity acts posteriorly, pushing against them and locking it in extension

Question 18

How does the knee allow us to stand?

Answer 18

Collateral ligaments are pulled taut and gravity acts anteriorly, locking the knee in extension

Question 19

How does the ankle allow us to stand?

Answer 19

Gravity pulls ankle into dorsiflexion, so energy is used by triceps surae to oppose that movement