Internal Muscle Structure

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 labeled "1" in the diagram?

• sarcolemma

• sarcoplasmic reticulum

• transverse tubules

• myofibril

What is labeled "2" (the yellow part) in the diagram?

• sarcolemma

• sarcoplasmic reticulum

• transverse tubules

• myofibril

What is labeled "4" (the blue/purple part) in the diagram?

• sarcolemma

• sarcoplasmic reticulum

• transverse tubules

• myofibril

Name the following in order from largest to smallest:

• muscle, muscle fascicle, muscle cell, myofibril, filaments

• muscle, muscle fascicle, muscle cell, filaments, myofibril

• muscle, muscle cell, muscle fascicle, myofibril, filaments

• muscle, muscle cell, muscle fascicle, filaments, myofibril

Tags

NGSS.HS-LS1-2

What happens in the transverse tubules of a muscle cell?

• excess ATP is stored in the tubules

• calcium ions are released into tubules' extracellular fluid

• action potentials are conducted through the tubules to the inside of the cell

• ATP is produced in the mitochondria found in the tubules

Which type of muscle tissue connects bones to other bones, allowing for movement of our joints?

• cardiac

• smooth

• skeletal

• sympathetic

Which type of muscle tissue is involuntary and found in places such as the stomach and intestines?

• cardiac

• smooth

• skeletal

• myofibrilic

What is labeled "6" in the diagram? These help convert oxygen and sugars into ATP for the muscle cell to use.

• actin

• sarcoplasmic reticulum

• myosin

• mitochondria

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-5

Which of the following is NOT a molecule?

• ATP

• fascicle

• actin

• myosin