Anatomy Muscle Contraction

Which muscle cells is considered the cell(plasma)membrane

• Sarcoplasmic Reticulum

• Sarcolemma

• Sarcoplasm

• myofibril

What is the primary function of the sarcoplasmic reticulum in muscle cells?

• Provide structural support

• Transmit nerve impulses

• Store calcium ions

• Generate ATP

Which component of the muscle cell is responsible for contraction?

• Sarcolemma

• Myofibril

• Sarcoplasm

• Sarcoplasmic Reticulum

What is the role of the sarcolemma in muscle cells?

• It stores energy

• It acts as a barrier and conducts electrical signals

• It synthesizes proteins

• It transports nutrients

All of the following are features of sarcolemma EXCEPT

• Composed of a lipid bilayer

• Selectively permeable

• Has resting membrane potential of -90

• Sarcolemma creates Terminal cisternae

Answer explanation

Sarcolemma creates T-tubules

What are the functions of Sarcoplasmic Reticulum?

• deliver a signal

• Forms terminal cisterae

• Stores Ca

• Signaling ion

Which muscle cells is a contractile organelle?

• Sarcoplasm

• Sarcolemma

• Myofibril

• sarcoplasmic reticulum

What is the role of myofibrils in muscle cells?

• They store calcium ions

• They conduct electrical signals

• They are responsible for muscle contraction

• They synthesize proteins

How does the sarcoplasmic reticulum contribute to muscle contraction?

• By generating ATP

• By storing and releasing calcium ions

• By synthesizing proteins

• By providing structural support

What goes in the blank space labeled A

• Sarcoplasmic Reticulum

• Sarcoplasm

• Sarcomere

• Myofibril