Muscle Tissue and Sarcomere Functions

This video by Ben from RegisteredNurseRN.com provides an overview of skeletal muscle tissue, one of the three types of muscle tissue in the human body. It explains the functions of skeletal muscles, such as voluntary movement, posture support, and heat production. The video delves into the structure of skeletal muscles, including connective tissues like epimysium, perimysium, and endomysium. It also covers the anatomy of muscle fibers and sarcomeres, highlighting the role of actin and myosin filaments in muscle contraction. The video concludes with additional resources for further learning.

Which type of muscle tissue is responsible for voluntary movements?

• Involuntary muscle

• Skeletal muscle

• Smooth muscle

• Cardiac muscle

What is the outer layer of connective tissue covering a skeletal muscle called?

• Epimysium

• Perimysium

• Sarcolemma

• Endomysium

What are the bundles of muscle fibers within a skeletal muscle known as?

• Tendons

• Sarcomeres

• Myofibrils

• Fascicles

What is the name of the cell membrane that wraps around each muscle fiber?

• Endomysium

• Sarcolemma

• Perimysium

• Epimysium

Which structure marks the endpoint of each sarcomere?

• A band

• H zone

• I band

• Z disc

What protein is responsible for the elasticity in sarcomeres?

• Myosin

• Titan

• Collagen

• Actin

Which band in the sarcomere contains only thin actin filaments?

• I band

• A band

• H zone

• Z disc

What is the function of the H zone in a sarcomere?

• Marks the end of a sarcomere

• Connects to the sarcolemma

• Contains only thick filaments

• Contains only thin filaments

During muscle contraction, what happens to the sarcomere?

• It remains the same

• It elongates

• It breaks apart

• It shortens

What additional resources are mentioned at the end of the video?

• A podcast and webinar

• A workshop and seminar

• A free quiz and anatomy videos

• A textbook and lecture notes