Musculoskeletal System

Question 1

Soleus muscle

Answer 1

Involved in walking, which is aerobic and resistant to fatigue

Question 2

Ila, Ili, and Ill fibers

Answer 2

Maximum duration that is too short to sustain walking

Question 3

Duchenne muscular dystrophy

Answer 3

Does not affect smooth muscle because they are not organized in sarcomeres
Treatment: A vector that will insert a promoter to promote transcription of DNA corresponding to the AON sequence

Question 4

Smooth muscle

Answer 4

Long filaments are anchored to the cell membrane at dense plaques

Question 5

Initial step in skeletal muscle contraction

Answer 5

Acetylcholine binds to a receptor at the neuromuscular junction

Question 6

In patellar reflex that causes the quadriceps to contract, an inhibitory interneuron is activated

Answer 6

The inhibitory interneuron inhibits contraction of the muscle that opposes the quadriceps

Question 7

Lacunae

Answer 7

Vacant spaces in bone tissue that were formerly occupied by osterocytes

Question 8

Haversian canals

Answer 8

Contain capillaries and nerves, and osteocytes often form concentric circles around them

Question 9

Osteoclasts

Answer 9

Responsible for breaking down bone, and form spaces larger than lacunae