Tissue and Skin Wiley
Assessment, Question 06 This type of junction contains tiny fluid-filled tunnels called connexons which allow the movement of ions and small molecules between cells. It is found between muscles cells of the heart and in organs with smooth muscle tissue such as the gastrointestinal tract. -tight junctions -gap junctions -desmosomes -hemidesmosomes -adherens junctions
gap junctions
Animation: Intercellular Junctions, Question 09 Which of the following bind cells to the basement membrane? -tight junctions -gap junctions -adherens junctions -hemidesmosomes
hemidesmosomes
Testbank, Question 21 Which exocrine gland is primarily used for thermoregulation? -Sebaceous gland -Eccrine sweat gland -Apocrine sweat gland -Ceruminous gland
Eccrine Sweat gland
Testbank, Question 75 From which of the primary germ layers of the embryo does the epidermis of the skin develop? -Endoderm -Ectoderm -Mesoderm -Both endoderm and ectoderm.
Ectoderm
Concept Check, Question 05 Epithelial and connective tissues are found adjacent to each other because: -Epithelium is avascular and needs to exchange oxygen, nutrients and waste with the blood of highly vascular connective tissue. -Connective tissue is avascular and needs to exchange oxygen, nutrients and waste with the blood of the highly vascular epithelium. -The two tissues are seldom adjacent to each other. -The two are coupled by gap junctions to allow for nutrient, oxygen and waste exchange.
Epithelium is avascular and needs to exchange oxygen, nutrients and waste with the blood of highly vascular connective tissue.
Testbank, Question 05 In a skin infection, which cell will take up and process microbial antigens? -Intraepidermal macrophages (Langerhans cells) -Melanocytes -Tactile epithelial cells (Merkel cells) -Stem Cells
Intraepidermal macrophages (langerhans cells)
Concept Check, Question 08 Which of the following statement is incorrect? -Simple squamous epithelium is found in thin layers so substances can pass through them rapidly. -Transitional epithelium change shape to allow structures such as the urinary bladder to distend and collapse. -Keratinized stratified squamous epithelium is adapted for absorption. -Ciliated simple columnar epithelium moves mucus by ciliary action.
Keratinized stratified squamous epithelium is adapted for absorption.
Testbank, Question 19 This type of exocrine gland undergoes a higher rate of mitosis due to its holocrine secretion. -Sebaceous gland -Eccrine gland -Apocrine gland -Eccrine and apocrine glands -Sebaceous and Eccrine glands
Sebaceous gland
Assessment, Question 46 Which of the connective tissue fibers imparts the greatest strength? -collagen -elastic -reticular
collagen
Testbank, Question 04 _____________covers and protects surfaces inside and outside of the body. ____________ help secure most of the epidermal cells together through intermediate filaments, while _______________ allow communication among the epidermal cells. This tissue will have a _______________ surface that is at the superficial layer, and a __________________ surface that is attached to the basement membrane by_______________.
epithelial tissue; desmosome junctions; gap junctions; apical; basal; hemidesmosome junctions
Assessment, Question 18 Where would you be able to find dense regular connective tissue in the body? -in the dermis of the skin -as padding around the heart or kidneys -in the spleen and lymph nodes -in tendons and ligaments -cartilage
in tendons and ligaments
Testbank, Question 25 A raised scar that extends into previously normal tissue is a(n) -hypertrophic scar -keloid scar -granulation scar -epidermal scar
keloid scar
Testbank, Question 13 Albinism is the inherited inability to produce -melanin. -carotene. -both melanin and carotene. -keratin. -melanocytes.
melanin
Assessment, Question 06 Which of the following is not a correct statement about melanin? -granules of melanin are produced and exported by melanocytes -melanin granules are the source of skin pigmentation -melanin is necessary for the production of vitamin D by the skin -melanin pigment protects DNA from damaging UV light -melanin granules are taken up by keratinocytes
melanin is necessary for the production of vitamin D by the skin
Assessment, Question 09 Which tissue, depending on its location and functions, is sometimes called endothelia or mesothelia? -simple columnar epithelium -areolar connective tissue -glandular epithelia -simple squamous epithelium -adipose tissue
simple squamous epithelium
Assessment, Question 41 Which tissue can withstand friction and abrasion? -simple epithelium -pseudostratified epithelium -stratified epithelium -elastic connective tissue
stratified epithelium
Testbank, Question 06 This layer is attached to the basement membrane by hemidesmosomes and to other cells by desmosomes. -Stratum basale -Stratum spinosum -Stratum granulosum -Stratum lucidum -Stratum corneum
stratum basale
Assessment, Question 08 Which epidermal layer marks the transition between metabolically active cells of lower layers and the dead layers of keratinocytes of the upper layers. -stratum corneum -stratum lucidum -stratum granulosum -stratum spinosum -stratum basale
stratum granulosum
Animation: Intercellular Junctions, Question 08 Which of the following protects cells from the movement of harmful substances, like hydrochloric acid? -tight junctions -gap junctions -adherens junctions -hemidesmosomes
tight junctions
