Question

figure 5.1 skin structure.
nervous structures

• sensory nerve fiber with free nerve endings
• lamellar corpuscle
• hair follicle receptor (root hair plexus)
• subpapillary plexus

appendages of skin

• hair root
• cutaneous plexus
• adipose tissue

1. match the structure with the word bank. write the letter from the illustration in the space for the corresponding term. (6)

___ dermis
___ epidermis
___ hair shaft
___ dermal papillae
___ papillary layer
___ hypodermis
___ hair follicle
___ arrector pili muscle
___ reticular layer
___ sweat gland
___ sweat pore
___ sebaceous gland

1. name two threats to the life of a burn patient. (2)

1. name two fibrous proteins found in areolar connective tissue. (2)

Explanation:

Identify skin structures from the diagram labels

• A: Hair shaft (the part of the hair projecting above the skin surface)
• B: Epidermis (the outermost layer of the skin)
• C: Papillary layer (the superficial layer of the dermis)
• D: Reticular layer (the deeper layer of the dermis)
• E: Dermis (the layer beneath the epidermis containing C and D)
• F: Hypodermis (the subcutaneous layer beneath the dermis)
• G: Sweat pore (the opening of a sweat gland duct on the skin surface)
• H: Sebaceous gland (oil gland connected to the hair follicle)
• I: Arrector pili muscle (smooth muscle attached to the hair follicle)
• J: Sweat gland (sudoriferous gland in the dermis)
• K: Hair follicle (sheath surrounding the hair root)

Identify threats to a burn patient

• Dehydration: Loss of the protective skin barrier leads to massive fluid loss, causing hypovolemic shock.
• Infection: The loss of the physical barrier allows pathogens to enter, leading to sepsis.

Identify fibrous proteins in areolar connective tissue

• Collagen fibers: Provide tensile strength.
• Elastic fibers (or elastin): Provide elasticity and resilience.
• Reticular fibers: Form a supportive meshwork.

Answer:

Question 40

• E dermis
• B epidermis
• A hair shaft
• C dermal papillae (or papillary layer)
• C papillary layer
• F hypodermis
• K hair follicle
• I arrector pili muscle
• D reticular layer
• J sweat gland
• G sweat pore
• H sebaceous gland

Question 41

1. Dehydration (extreme fluid loss leading to hypovolemic shock)
2. Infection (loss of skin barrier leading to bacterial invasion and sepsis)

Question 42

1. Collagen (collagen fibers)
2. Elastin (elastic fibers)