Chapter 5 - Integumentary System

Merocrine gland - 1 Apocrine gland - 3 Sebacious gland - 2

Match the exocrine gland with its description. 1. Secretes sweat to skin surface 2. Produces an oily material 3. Secretes sweat into a hair follicle Merocrine gland Apocrine gland Sebacious gland

A) Protection Protection B) Prevention of water loss Prevention of water loss C) Temperature regulation Temperature regulation E) Immune defense Explanation The integument has many varied functions, including protection, prevention of water loss, temperature regulation, metabolic regulation, immune defense, sensory reception, and excretion by means of secretion.

Check all that are a function of the integument. A) Protection Protection B) Prevention of water loss Prevention of water loss C) Temperature regulation Temperature regulation D) Movement Movement E) Immune defense

[X] The subcutaneous layer is not part of the integument. The subcutaneous layer is not part of the integument. [X] The subcutaneous layer consists of areolar and adipose connective tissue. The subcutaneous layer consists of areolar and adipose connective tissue. [] The subcutaneous layer is avascular. The subcutaneous layer is avascular. [X] One of the functions of the subcutaneous layer is thermal insulation. One of the functions of the subcutaneous layer is thermal insulation. Explanation The subcutaneous layer, or hypodermis, is not part of the integument, but functions to bind it to the underlying tissues. Additionally, it pads and protects the body, and provides thermal insulation. Its excessive vascular network make it an ideal site for injections.

Check all the statements that are true regarding the subcutaneous layer (hypodermis). [] The subcutaneous layer is not part of the integument. The subcutaneous layer is not part of the integument. [] The subcutaneous layer consists of areolar and adipose connective tissue. The subcutaneous layer consists of areolar and adipose connective tissue. [] The subcutaneous layer is avascular. The subcutaneous layer is avascular. [] One of the functions of the subcutaneous layer is thermal insulation. One of the functions of the subcutaneous layer is thermal insulation.

1. Stratum corneum 2. Stratum lucidum 3. Stratum granulosum 4. Stratum spinosum 5. Stratum basale 6. Dermis

Label the layers of the epidermis. Stratum basale Stratum corneum Dermis Stratum granulosum Stratum lucidum Stratum spinosum

1. epidermis 2. dermis 3. Adipose Connective Tissue

Label the structures of the integument. Adipose Connective Tissue Dermis Epidermis

Hair bulb - 2 Hair papilla - 4 Hair root - 1 Hair shaft - 3

Match the component of hair with its description. 1. Portion of hair within the follicle 2. Swelling where the hair originates 3. Portion of hair beyond the skin surface 4. Contains blood vessels and nerves Hair bulb Hair papilla Hair root Hair shaft

Stratum basale - 2 Stratum spinosum - 1 Stratum granulosum - 4 Stratum lucidum - 5 Stratum corneum - 3

Match the strata of the epidermis with its description. 1) Contains keratinocytes and dendritic cells 2) Deepest layer 3) 20-30 layers of dead keratinocytes 4) Three to five layers of keratinocytes 5)Thin, clear layer Stratum basale Stratum spinosum Stratum granulosum Stratum lucidum Stratum corneum

1. Epidermis 2. Dermis 3. Hypodermis

Put the tissues that are involved with the integument in order, beginning with the most superficial (outer) layer and ending with the deepest layer. Epidermis Dermis Hypodermis

B) Temperature regulation Explanation Sweat glands are involved in temperature regulation because the liquid on our skin cools us off as it evaporates. All of the other choices are indeed functions of the integument, but do not involve the sweat glands.

Select the function of the integument in which sweat glands are involved. A) Production of vitamin D3 B) Temperature regulation C) Protection D) Sensory perception

False Explanation All people have roughly the same number of melanocytes; therefore, differences in skin pigmentation are due to the amount of melanin the melanocytes produce.

T/F Difference in skin pigmentation is due to a difference in the number of melanocytes each individual has.

D) stratified squamous epithelium; dense irregular and areolar Explanation The integument is composed of an outer stratified squamous epithelium (the epidermis), and a deeper dense irregular and aerolar connective tissue (the dermis).

The integument consists of the epidermis, which is composed of _____________, and the dermis, which is composed of ____________ connective tissue. A) simple squamous epithelium; dense regular B) dense irregular connective tissue; dense regular and dense irregular C) simple columnar epithelium; stratified D) stratified squamous epithelium; dense irregular and areolar

vasoconstrict Explanation Vasoconstriction is the term used to describe the narrowing, or constricting of blood vessels. The dermis contains blood vessels that help control body temperature by constricting when you are cold and dilating when you are hot.

When you are cold, the dermal blood vessels ______________ in order to conserve heat. vasoconstrict vasodilate shorten lengthen

Hair follicles Explanation Thick skin contains all five epidermal strata, as well as sweat glands. Thick skin does not contain hair follicles or sebacious glands.

Which of the following is not found in thick skin? Stratum lucidum Stratum corneum Hair follicles Sweat glands

areolar and dense irregular Explanation The dermis is composed of areolar and dense irregular connective tissue.

Which of the following type(s) of connective tissue comprise the dermis? Check all that are correct. Elastic Adipose Areolar Dense irregular

Nail bed Explanation The nail bed is the epithelium that is under the nail body, and would bleed if you injured it.

You accidentally cut your fingernail too far, causing a sharp pain and some bleeding. Which part of your nail was injure Free edge Lanula Hyponychium Nail bed