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jouranngreen108 jouranngreen108
wrote...
Posts: 517
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6 years ago
Cube-shaped bones that contain mostly spongy bone are called ________ bones.
 
  A) flat
  B) long
  C) short
  D) irregular



(Question 2) What bones protect the spinal cord?
 
  A) ribs
  B) sternum
  C) vertebrae
  D) coxal bones



(Question 3) Which of the following is NOT a function of the skeletal system?
 
  A) storage of fat and minerals
  B) support the body
  C) protection of soft body organs
  D) regulation of blood pressure



(Question 4) Julia works in a walk-in clinic where several patients arrive with sunburns. How should she distinguish the first-degree and second-degree burns from one another?
 
  What will be an ideal response?



(Question 5) Differentiate among the roles of melanocytes and keratinocytes. Where in the skin are these cells located?
 
  What will be an ideal response?



(Question 6) List and describe the three types of epithelial membranes.
 
  What will be an ideal response?



(Question 7) Identify four changes that occur to the skin and subcutaneous connective tissue as a result of aging, and state how these changes can be delayed.
 
  What will be an ideal response?



(Question 8) Explain how the skin functions to protect deeper tissues from microbe damage.
 
  What will be an ideal response?



(Question 9) Explain how the skin helps regulate body temperature.
 
  What will be an ideal response?



(Question 10) Distinguish between the locations and secretions of apocrine and eccrine sweat glands.
 
  What will be an ideal response?
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Replies
wrote...
6 years ago
1) C

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2) C

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3) D

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4) Although both first-degree and second-degree burns produce red and painful skin and are partial thickness burns, only the second-degree burns produce blisters.

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5) Melanocytes are located in the stratum basale of the epidermis. These cells produce a pigment, melanin, upon exposure to the sun. Melanin functions to protect the dermis from damage due to UV radiation. Keratinocytes form most of the cells of the epidermis; they produce a water-resistant, tough protein called keratin.

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6) 1. Cutaneous membrane is:
a. skin
b. dry
c. composed of keratinizing stratified squamous epithelium and the
underlying connective tissue is often dense and fibrous.
2. Mucous membrane:
a. is moist
b. is found lining all body cavities that open to the exterior
c. often contains stratified squamous epithelium or simple columnar epithelium
3. Serous membrane:
a. is composed of two layers (visceral layer covers the organ in the cavity while
the parietal layer lines a specific portion of the wall of the ventral body cavity)
b. covers organs in body cavities that are closed to the exterior
c. is constructed of simple squamous epithelium overlying a thin layer
of areolar connective tissue

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7) 1. The amount of subcutaneous tissue below the skin decreases, leading to an intolerance to cold in the elderly.
2. Because of decreased oil production and declining numbers of collagen fibers, the skin becomes drier and may become itchy and bothersome.
3. Thinning of the skin makes it more susceptible to bruising and other types of injuries.
4. A decrease in elasticity of the skin, along with the loss of subcutaneous fat, allows bags to form under the eyes and causes jowls to sag.
To delay these changes, the skin should be kept clean and shielded from the sun, and a healthy diet with plenty of fluids should be maintained.

- - -

8) The skin forms an unbroken surface and an acid mantle. Skin secretions are acidic and thus inhibit microbes, such as bacteria. Phagocytes ingest foreign substances and pathogens, preventing them from penetrating into deeper body tissues.

- - -

9) The nervous system is responsible for controlling all temperature-regulating functions of the skin. When the temperature in the external environment is high, heat loss occurs as the nervous system activates sweat glands. Perspiration is produced, which evaporates from the skin surface, causing heat to be dissipated. At the same time, the nervous system causes blood to be flushed into skin capillary beds so that heat radiates from the body surface. In contrast, when the temperature in the external environment is low, the nervous system prevents blood from entering the skin capillary system and radiation to the body exterior is prevented so that perspiration does not occur.

- - -

10) Eccrine sweat glands are more numerous than apocrine sweat glands; they are found all over the body. Eccrine sweat glands function in body temperature regulation. When we are too hot, eccrine sweat glands release sweat containing water, salts, vitamin C, and metabolic wastes on to the body's surface. Upon its evaporation, we are cooled down. The ducts of apocrine sweat glands empty into hair follicles in the axillary and genital areas. Apocrine sweat glands activate at puberty and produce sweat almost continuously, but their overall function is not known. Apocrine sweat is milky or yellowish in color due to fatty acids and proteins in the secretions.
wrote...
6 years ago
TY
wrote...
6 years ago
You're welcome
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