Tissue Repair and Regeneration Quiz

Tissue Repair Process

• Formation of new stem cells is NOT a step in tissue repair.
• Inflammation is the first event in the tissue repair process and sets the stage for subsequent repair events.
• The correct sequence of tissue repair is inflammation, organization, and regeneration.

Muscle Regenerative Abilities

• Smooth muscle has a moderate regenerative ability.
• Skeletal muscle demonstrates a weak regenerative ability.
• Cardiac muscle has virtually no functional regenerative capacity.

Connective Tissue Regeneration

• Areolar connective tissue regenerates extremely well.
• Tendons and ligaments exhibit moderate regenerative ability.

Fluid Accumulation in Blisters

• The fluid in a blister originates from the plasma of blood in dermal blood vessels.
• The epidermis is avascular but highly innervated; the dermis contains many blood vessels and fewer nerve endings.

Tissues with Limited Regeneration

• Cardiac muscle and nervous tissue in the brain and spinal cord have little to no functional regenerative capacity, typically replaced by scar tissue.

Dermis Characteristics

• The papillary layer of the dermis consists of loose areolar connective tissue and is rich in blood vessels, aiding in bodily defenses.
• The dermis is primarily made up of dense irregular connective tissue, with interwoven collagen fibers providing resistance to tearing from various directions.

Importance of Macrophages in Wound Healing

• Macrophages play a crucial role in wound healing by phagocytosing foreign materials, cell debris, and dead cells, which facilitates the formation of granulation tissue.

Hypodermis Function

• The hypodermis does not supply cells to replace those lost from the epidermis; this function is performed by basal cells of the epidermis.