A&P Review Ch.1-7

What is melanin and what cells produce it?

• Melanocytes-Packaged into melanosomes that are sent to shield DNA of keratinocytes from damaging UV sunlight

• Dendritic Cells-Star-shaped macrophages that patrol deep epidermis

• Keratinocytes-Produce fibrous keratin (protein that gives skin its protective properties)

• Tactile cells- feelers

Differences between first, second, and third degree burns.

What is Wolff's law?

• calcium homeostasis of the blood

• the shape of a bone being determined by mechanical stresses placed on it

• the electrical charge on bone surfaces

Answer explanation

bones grow or remodel in response to the demands placed on them

What is carotene?

Rickets vs Osteomalacia

Answer explanation

Osteomalacia-–ostoid produced, calcium salts not desposited properly

vita D defiency

Rickets-kid osteomalacia

Differences between scoliosis, kyphosis, and lordosis.

Answer explanation

scoliscis0 s shaped curved

lordiosis- curved of lumbar(kardashian)

khyphonis- curve of thorasic(hunch back)

Where do all connective tissue derived from?

What distinguishes gland A from gland B?

• the method of secretion

• the use of epithelial cells to produce products  

• the direct secretion of products into the blood

• the use of a duct  

Answer explanation

The gland in A is secreting in a merocrine manner, while B is secreting in a holocrine manner.

Which of the following statements is true?    

• Dense connective tissue includes a great deal of collagen.  

• Dense connective tissue includes a large amount of reticular fibers.

• All subclasses of loose connective tissue do not contain collagen fibers.  

• 
  Loose connective tissue includes cartilage.

 With regards to a variation of a physiological value from its set point or normal limit, negative feedback always __________ the value back to the set point or normal limit.  

• decreases

• returns

• increases

• There is not enough information to answer this question