Chapter 10 Muscles

Question 1

What are the 7 ways muscles can be named? Give an example for each

Answer 1

Location -  Frontalis
Shape - Deltoid
Attachments - Extensor CARPI RADIALIS
Size - BREVIS
Directions of fibers/fascicles - RECTUS
Number of origins -  BIceps femoris
Action - EXTENSOR

Question 2

If a muscle is named for its attachments, which is named first, the origin or insertion?

Answer 2

Origin; extensor carpi ulnaris originates on the carpals and inserts on the ulna

Question 3

What do circular muscles do?

Answer 3

squeeze or close

Question 4

what do convergent muscles do?

Answer 4

adduct, rotate

Question 5

what do fucsiform muscles do?

Answer 5

flex, supinate (biceps brachii)

Question 6

What do -“pennate” muscles do?

Answer 6

powerful with less range (deltoid)

Question 7

in general, a muscle that crosses anterior side of joing

Answer 7

flexion

Question 8

In general, a muscle that crosses posterior side of joint

Answer 8

extension

Question 9

In general, a muscle that crosses lateral side of joint

Answer 9

abduction

Question 10

In general, a muscle that crosses medial side of joint

Answer 10

adduction

Question 11

If the fulcrum of the lever is in the middle, it’s a

Answer 11

1st class lever

Question 12

If the load of the lever is in the middle, it’s a

Answer 12

2nd class lever

Question 13

If the effort of the lever is in the middle, it’s a

Answer 13

3rd class lever

Question 14

What’s the difference between a power lever and a speed lever?

Answer 14

Power-fulcrum close to load, strength is priority over speed

Speed-fulcrum far away from load, speed is priority