Muscle Tissue

Which type of muscle tissue has intercalated disks?

• Cardiac

• Skeletal

• Smooth

• Cardiac & Skeletal

Which type of muscle tissue is striated?

• Cardiac

• Smooth

• Skeletal

• Both cardiac and skeletal are correct

Which type of muscle tissue is found in the walls of hollow internal organs?

• Cardiac

• Skeletal

• Smooth

• Smooth and Cardiac

Which type of muscle tissue or tissues are involuntary?

• Smooth

• Skeletal

• Cardiac

• Both Cardiac and Smooth

What does the endomysium cover?

• A muscle fiber

• A muscle fascicle

• The whole muscle organ

• A tendon

Which of the following is NOT a function of skeletal muscles?

• Generate heat

• Maintain posture

• Move food through the GI tract

• Keep blood moving in veins and lymphs in the lymphatic system

What is the sarcolemma

• Plasma membrane of a muscle fiber that forms T-tubules

• Cytoplasm of a muscle fiber that contains organelles, including myofibrils

• A polysaccharide that stores energy for muscle contraction

• A red pigment that stores oxygen for muscle contraction

What is the Sarcoplasm

• Plasma membrane of a muscle fiber that forms T-tubules

• Cytoplasm of a muscle fiber that contains organelles, including myofibrils

• A polysaccharide that stores energy for muscle contraction

• A red pigment that stores oxygen for muscle contraction

What is a Myofibril

• The smooth ER of a muscle fiber that stores calcium

• Extension of the sarcolemma that extends into the muscle fiber and conveys nerve signals that cause calcium to be released

• Thick and thin filaments whose structure and functions account for muscle striations and contractions

• A bundle of myofilaments that contract

What is released from synaptic vessels to stimulate a muscle fiber to contract?

• Calcium ions

• Acetylcholine

• ATP

• Troponin