Lecture 6

Question 1

Example of a first class lever?

Answer 1

Sternocleidomastoid

Question 2

Example of a second class lever?

Answer 2

Standing on balls of feet

Question 3

Example of a third class lever?

Answer 3

Picking something up with hand

Question 4

Bear arms compared to humans

Answer 4

In bears the biceps tendon inserts further down (distally) on the forearm, resulting in very strong but relatively slower flexion

Question 5

Four organization patterns in fascicles

-Example of circular?

Answer 5

Orbicularis oris

Question 6

Four organization patterns in fascicles

-Example of convergent?

Answer 6

Pec major

Question 7

Four organization patterns in fascicles

-Example of parallel-strap like?

Answer 7

Sternocleidomastoid

Question 8

Four organization patterns in fascicles

-Example of parallel fusiform?

Answer 8

Biceps brachii

Question 9

Four organization patterns in fascicles

-Example of unipennate?

Answer 9

Flexor pollicis longus

Question 10

Four organization patterns in fascicles

-Example of bipennate?

Answer 10

rectus femoris

Question 11

Four organization patterns in fascicles

-Example of multipennate?

Answer 11

Deltoid

Question 12

Forms of muscle action

Answer 12

• Isometric
• Concentric
• Eccentric

Question 13

Isometric

Answer 13

• No movement

- Gravity=resistance

Question 14

Concentric

Answer 14

Force generated by muscle exceeds force of gravity

Question 15

Eccentric

Answer 15

• Muscle relaxes; force generated becomes less than gravity

- Gravity pulls limb down as muscle resistance decreases