Muscular Anatomy

Question 1

Understand the different types of muscle fibers.

Answer 1

Cardiac- Involuntary, striated heart
Smooth- Nonstriated, involuntary, digestive system
Skeletal- multinucleated, striated. Voluntary muscles.

Question 2

Muscle intervation for Trapezius

Answer 2

C2-4

Question 3

Muscle intervation for Deltoid

Answer 3

C5-6

Question 4

Muscle intervation for Bicept

Answer 4

C5-6

Question 5

Muscle intervation for Tricept

Answer 5

C6-8

Question 6

Muscle intervation for Thenar

Answer 6

C8-T1

Question 7

Muscle intervation for Hypothenar

Answer 7

C8-T1

Question 8

Muscle intervation for Intercostals

Answer 8

T2-6

Question 9

Muscle intervation for Upper abs

Answer 9

T7-12

Question 10

Muscle intervation for Lower abs

Answer 10

T7-12

Question 11

Muscle intervation for Illiopsois

Answer 11

L1-4

Question 12

Muscle intervation for Vastus Lateralis

Answer 12

L2-4

Question 13

Muscle intervation for Bicept Femoris

Answer 13

L5-S2

Question 14

Muscle intervation for Tibialis Anterior

Answer 14

L4-S1

Question 15

Muscle intervation for Gastronemius

Answer 15

S1-2

Question 16

Define Flexor

Answer 16

Muscle that brings connected bones closer together when it contracts.

Question 17

Define extensor

Answer 17

Muscle that moves away from each other

Question 18

Define ABDuctor

Answer 18

moves limbs away from the midline

Question 19

Define ADDuctor

Answer 19

Moves towards the midline

Question 20

Explain motor units and the differential size of motor units among muscles.

Answer 20

Motor unit is a neuron and all the fibers it innervates. Gross motor skills utilize large motor units that have many fibers. Fine motor skills utilize small motor units that have fewer fibers for more precise movement