Quiz 6 (CH 5 and 6)

The epidermis is composed of which of the following tissues?

• Stratified columnar epithelial tissue

• dense irregular connective tissue

• adipose connective tissue

• keratinized stratified squamous epithelial tissue

What is the primary function of melanin?

• to produce sebum

• to waterproof the skin

• uptake calcium from the diet

• to provide protection against the sun's UV rays

Which of the following is the correct sequence of the epidermal layers of thick skin, from deep to superficial

• Stratum spinosum, stratum lucidum, stratum corneum, stratum basale, and stratum granulosum

• Stratum granulosum, stratum corneum, stratum lucidum, stratum spinosum, and stratum basale

• Stratum basale, stratum granulosum, stratum corneum, stratum spinosum,and stratum lucidum

• stratum basale, stratum spinosum, stratum granulosum, stratum lucium, and stratum corneum

Adipose tissue is concentrated in which of the following layers

• stratum lucidum

• hypodermis

• papillary layer of the dermis

• stratum basale

A condition that produces a reduction in bone mass sufficient to compromise normal function is ___

• osteomyelitis

• osteoporosis

• osteopenia

• osteolitis

Which of the following statements concerning the periosteum of a bone is NOT true?

• The periosteum is important for bone growth in width

• Blood vessels enter bone through the periosteum

• All bone surfaces in the body are covered by the periosteum

• The periosteum provides strong attachment and continuity from tendon to bon e

During fetal imbramembraneous ossification, bone develops from ____

• lamallae

• the medullary cavity

• hyaline cartilage

• fibrous connective tissue membranes

Mary is 50 years old. During a checkup, a bone scan reveals that portions of her skeleton show signs of osteoporosis. After revieweing the test results, her physician suggests hormone therapy. What hormone is prescribed for Mary?

• Parathyroid hormone

• Thyroid hormone

• Growth hormone

• estrogen

Answer explanation

In post-menopausal women, low estrogen production can cause osteoporosis. Estrogen maintains bone mass by inhibiting the effects of the parathyroid hormone which stimulates osteoclatic actvity to release calcium into blood

Bones store energy as lipids in

• the ground substance

• spongy bone

• yellow marrow

• red marrow

The principal role of melanin  is to __________. 

• give one a mellow feeling 

• keep the body cool 

• provide a waterproof layer 

• shield the nucleus from damage by ultraviolet radiation.

Answer explanation

The nucleus itself is the site that contains the DNA, if there is some type of damage to this DNA there is potential risk in developing cancer because cells are not dividing correctly. Therefore, it is important to wear sunscreen to prevent skin cancer.