Microanatomy of Muscles

Found attached to bones throughout the body

• smooth

• cardiac

• skeletal

• all

A ______ is a strong connective tissue that attaches muscle to bone.

• Tendon
• Ligament
• Cartilage

Name the following in order from largest to smallest:

• muscle, muscle fascicle, muscle fiber, myofibril, filaments

• muscle, muscle fascicle, muscle fiber, filaments, myofibril

• muscle, muscle fiber, muscle fascicle, myofibril, filaments

• muscle, muscle fiber, muscle fascicle, filaments, myofibril

Tags

NGSS.HS-LS1-2

The cell membrane of a muscle fiber is called the

• sarcoplasm

• sarcolemma

• sarcoplasmic reticulum

What is shown in the colored part of this diagram?

• a whole muscle

• five muscle fibers

• five muscle fascicles

• five myofibrils

Tags

NGSS.HS-LS1-2

What is the length between Z-lines of an actin molecule called?

• fascicle

• sarcomere

• myosin binding site

• sarcoplasmic length

The outermost layer of connective tissue that covers the WHOLE muscle is called the

• Perimysium

• Epimysium

• Endomysium

• Sarcomysium

The connective tissue layer that surrounds the fascicle is the:

• Perimysium

• Epimysium

• Endomysium

• Sarcomysium

The two proteins that move in order for the muscle to contract are called...

• actin & myosin

• actin & myofibril

• myosin & acetone

• potassium & calcium

Why is the heat lost during muscle contraction helpful?

Tags

NGSS.HS-LS1-7