Module 6 HAnatomy Muscular System

There are approximately ___________ muscles in the human body

• 370

• 640

• 1

• 642

Functions of Skeletal Muscles are

• produce movement, maintain body posture

• support soft tissue, guard openings

• maintain body temperature, store nutrient reserves

• ALL OF THE ABOVE

Muscular contractile tissue

• is derived from the mesodermal layer of embryonic germ cells

• is derived from the epidermal layer of embryonic germ cells

• is derived from the bone marrow tissue layers

• is derived from the periosteum

Tags

NGSS.HS-LS1-4

Hyperplasia

• decreasing the number of muscle fibers

  (ONLY happens through exercise)

• increasing the number of muscle fibers

  (ONLY happens through exercise)

• increasing the number of muscle fiber

  (doesn't happen through exercise)

• decreasing the number of muscle fibers

  (doesn't happen through exercise)

Hypertrophy

• Muscle growing rapidly

• increasing the size of the of the muscle (the muscle growing or getting larger in diameter; happens with exercise)

• decreasing the size of the of the muscle (the muscle shrinking or getting smaller in diameter; happens with exercise)

• a constant muscle diameter throughout lifespan

3 types of muscle tissue

• Skeletal

• Cardiac

• Smooth

• ALL OF THE ABOVE

• 1 AND 2 ONLY

Skeletal Muscle

• are autonomic

• is voluntary

• is involuntary

• at times can be voluntary or involuntary

Cardiac & Smooth Muscle

• voluntary

• at times can be voluntary or involuntary

• are involuntary

• autonomic

Epimysium

• exterior or outer most connective tissue layer of a muscle

• interior or inner most connective tissue layer of a muscle

• medial or middle layer connective tissue layer of a muscle

• softer connective tissue layer of the muscle

Perimysium

• surrounds muscle fibers

• doesn't surround muscle fibers or blood vessels and nerve supply

• surrounds blood vessels and nerve supply

• surrounds muscle fiber bundles (fascicles), contains the blood vessels & nerve supply to fascicles

Tags

NGSS.HS-LS1-2