Skeletal muscle structure and function

Skeletal muscles are specially designed to perform contractions based on their characteristic properties such as

• strength

• flexibility

• plasticity

• elasticity

Tags

NGSS.HS-LS2-3

Muscle contraction is involved in a series of important physiological processes such as

• breathing

• heat generation

• maintaining normal body temperature

Tags

NGSS.HS-LS1-3

Select the correct SM hierarchy (Largest to smallest)

• Myofibril, Myofiber, Fascicle, Perimysium, Epimysium, Fascia

• Fascia, Epimysium, Fascicle, Myofiber, Perimysium, Myofibril

• Myofibril, Perimysium, Epimysium, Myofiber, Fascicle, Myofiber

• Fascia, Epimysium, Perimysium, Fascicle, Myofiber, Myofibril

Tags

NGSS.HS-LS1-2

Muscle Cell

• Myofiber

• Myofibril

• Fascicle

• Fiber

Contractile force generation

• Myofiber

• Myofibril

• Fascia

• Epimysium

Fiber number per muscle ranges from hundreds in small muscles to >1 million in large muscles

• True

• False

Largest cell in the body

• Myofiber

• Myofibril

• Fascicle

• Fascia

Myofibrils consists of _____ lined-up units called sarcomeres

• 2500

• 8000

• 5500

• 7500

Tags

NGSS.HS-LS1-2

The functional unit of skeletal muscle

• Sacromere

• Actin

• Myosin

• Titin

Sarcomeres are composed of several contractile and cytoskeletal proteins, select all the that apply

• Actin

• Myosin

• Myofibril

• Desmin

• Titin