KAAP350 Unit 3 - Muscle Microanatomy

What is the relationship between connective tissue components of a muscle and the internal organization of a muscle?

• They provide energy for muscle contractions.

• They describe the compartmentalization of muscle groups.

• They are responsible for the color of the muscle.

• They control the electrical impulses in muscle fibers.

What is the shortcoming of calling muscle-bone attachments "origins and insertions"?

• It does not reflect the dynamic nature of muscle attachments.

• It implies that muscles can only attach to bones.

• It suggests that muscles do not have any flexibility.

• It indicates that the attachments are permanent and unchanging.

What are the structural components of a muscle fiber?

• Actin and myosin filaments.

• Blood vessels and nerves.

• Tendons and ligaments.

• Adipose tissue and skin.

What is the function of the major proteins of a muscle fiber?

• They provide structural support to the muscle.

• They store genetic information.

• They regulate the entry and exit of substances in the muscle cell.

• They facilitate the contraction and relaxation of the muscle.

How do the striations of a muscle fiber relate to the protein filaments?

• They indicate the presence of connective tissue.

• They represent the overlapping arrangement of protein filaments.

• They show the amount of fat within the muscle.

• They reflect the number of mitochondria in the muscle fiber.

What is the outermost layer of connective tissue surrounding a muscle called?

• Endomysium

• Perimysium

• Epimysium

• Fascia

Which structure is a bundle of muscle fibers within a muscle?

• Muscle fascicle

• Nerve

• Blood vessel

• Epimysium

What is the name of the connective tissue that separates and surrounds muscle compartments?

• Intermuscular septum

• Epimysium

• Perimysium

• Endomysium

What are the two bones labeled in the compartment diagram?

• Tibia and Fibula

• Humerus and Radius

• Tibia and Fibula

• Femur and Tibia

What type of muscle attachment is depicted in the image?

• Tendon

• Aponeurosis

• Direct / Fleshy

• Ligament