6.10 Muscles - Body Movements and Muscle Development

Question 1

What percentage of our bodyweight consists of skeletal muscle/bones?

Answer 1

SK Muscle: 40%
Skeleton: 15%

Question 2

What is the name of the join between muscle and tendon?

Answer 2

Myotendinous junction

Question 3

What is the name of the join between tendon and bone?

Answer 3

Osteotendinous junction

Question 4

Are tendons more or less vascularised than muscle? What are the implications of this on healing?

Answer 4

Less. Therefore, tendons take longer to heal than muscle

Question 5

Dermatomes/myotomes

Answer 5

Areas of skin/muscle that are innervated by nerves from specific vertebrae

Question 6

How many nerves vs bones in the cervical spine?

Answer 6

Nerves: 8
Bones: 7

Nerves transition from above to below vertebrae

Question 7

What is the purpose of the cervical and lumbar enlargement?

Answer 7

Innervation of upper and lower limbs

Question 8

Brachial plexus

Answer 8

• C5 -T1
• Branches into many nerves that innervate the upper limb

Question 9

Lumbar plexus

Answer 9

T12-L5

Collection of nerves that arise from the spinal cord and innervate the lower limbs

Question 10

In order to control a joint, a muscle must ___ that joint

Answer 10

Cross

Question 11

What is vitamin C important for?

Answer 11

Laying down collagen

Question 12

Think: why are teeth lost during scurvy?

Question 13

Describe Vit D3 -> Vit D transition

Answer 13

Occurs in the present of UV light

Question 14

What are two hormones associated with MSK growth?

Answer 14

• Thyroid hormone
• Human Growth Hormone (HGH)