Question 1

Which structure is present in thin skin but lacking in thick skin?

Accepted Answer

A)  Eccrine sweat glands 
B)  Hair follicles 
C)  Melanocytes 
D)  Stratum corneum 
E)  Stratum spinosum 
A)  Eccrine sweat glands 
B)  Hair follicles 
C)  Melanocytes 
D)  Stratum corneum 
E)  Stratum spinosum B

Question 2

How do keratinocytes acquire melanin?

Accepted Answer

A)  Keratinocytes acquire melanin precursors (e.g.,tyrosine)from melanocytes via plasma membrane amino acid transporter proteins 
B)  Keratinocytes phagocytize cytoplasmic processes of melanocytes that contain melanosomes 
C)  mRNA molecules that code for melanin proteins are exported from melanocytes to keratinocytes 
D)  Melanocytes synthesize melanocyte-stimulating hormone.,which binds to receptors on keratinocytes 
E)  Melanocytes undergo apoptosis and export melanosomes via a holocrine mode of secretion 
A)  Keratinocytes acquire melanin precursors (e.g.,tyrosine)from melanocytes via plasma membrane amino acid transporter proteins 
B)  Keratinocytes phagocytize cytoplasmic processes of melanocytes that contain melanosomes 
C)  mRNA molecules that code for melanin proteins are exported from melanocytes to keratinocytes 
D)  Melanocytes synthesize melanocyte-stimulating hormone.,which binds to receptors on keratinocytes 
E)  Melanocytes undergo apoptosis and export melanosomes via a holocrine mode of secretion B

Question 3

A feature unique to keratinocytes in the stratum corneum is that cells in this location:

Accepted Answer

A)  Contain basophilic keratohyaline granules 
B)  Have a short half-life and rapidly undergo mitosis to form new cells 
C)  Have large numbers of mitochondria 
D)  Lack discrete nuclei 
E)  Possess large numbers of desmosomes 
A)  Contain basophilic keratohyaline granules 
B)  Have a short half-life and rapidly undergo mitosis to form new cells 
C)  Have large numbers of mitochondria 
D)  Lack discrete nuclei 
E)  Possess large numbers of desmosomes D

Question 4

The function of Merkel cells in the skin is to:

Accepted Answer

A)  Acquire and present antigens to lymphocytes 
B)  Function as mechanoreceptors that respond to pressure 
C)  React to heat via temperature-sensitive calcium channels 
D)  Synthesize melanin 
E)  Synthesize the bulk of keratin within the skin 
A)  Acquire and present antigens to lymphocytes 
B)  Function as mechanoreceptors that respond to pressure 
C)  React to heat via temperature-sensitive calcium channels 
D)  Synthesize melanin 
E)  Synthesize the bulk of keratin within the skin

Question 5

Which molecules in the skin attach directly to the basal lamina beneath the keratinocytes?

Accepted Answer

A)  Anchoring fibrils of type VII collagen 
B)  Banded fibers of type II collagen 
C)  Clathrin 
D)  Keratin fibers 
E)  Microtubules 
A)  Anchoring fibrils of type VII collagen 
B)  Banded fibers of type II collagen 
C)  Clathrin 
D)  Keratin fibers 
E)  Microtubules

Question 6

In the stratum granulosum of the skin,keratinocytes are filled with basophilic keratohyaline granules.These granules form as a result of which intracellular process?

Accepted Answer

A)  Accumulation of hyaluronic acid 
B)  Degeneration of mitochondria 
C)  Formation of aggregations of profilaggrin 
D)  Fragmentation of the nucleus during keratinocyte apoptosis 
E)  Synthesis of hemidesmosomes 
A)  Accumulation of hyaluronic acid 
B)  Degeneration of mitochondria 
C)  Formation of aggregations of profilaggrin 
D)  Fragmentation of the nucleus during keratinocyte apoptosis 
E)  Synthesis of hemidesmosomes

Question 7

The abundant,clear cells found in eccrine sweat glands are specialized for:

Accepted Answer

A)  Contraction during the production of sweat 
B)  Secretion of lipid molecules onto the skin 
C)  Synthesis of antibiotic molecules like dermicidin 
D)  Synthesis of melanin 
E)  Transport of sodium,chloride,and water 
A)  Contraction during the production of sweat 
B)  Secretion of lipid molecules onto the skin 
C)  Synthesis of antibiotic molecules like dermicidin 
D)  Synthesis of melanin 
E)  Transport of sodium,chloride,and water

Which structure is present in thin skin but lacking in thick skin?

How do keratinocytes acquire melanin?

A feature unique to keratinocytes in the stratum corneum is that cells in this location:

The function of Merkel cells in the skin is to:

Which molecules in the skin attach directly to the basal lamina beneath the keratinocytes?

In the stratum granulosum of the skin,keratinocytes are filled with basophilic keratohyaline granules.These granules form as a result of which intracellular process?

The abundant,clear cells found in eccrine sweat glands are specialized for:

The Cell

Epithelium and Exocrine Glands

Connective Tissue

Muscle Tissue

Nervous Tissue

Cartilage and Bone

Blood and Bone Marrow

Cardiovascular System

Lymphoid System

Endocrine System

Upper Digestive System

Lower Digestive System

Liver, Gallbladder, and Exocrine Pancreas

Respiratory System

Urinary System

Male Reproductive System

Female Reproductive System

Eye and Adnexa

Special Senses

Filters

Exam 11: Integumentary System

Which structure is present in thin skin but lacking in thick skin?

How do keratinocytes acquire melanin?

A feature unique to keratinocytes in the stratum corneum is that cells in this location:

The function of Merkel cells in the skin is to:

Which molecules in the skin attach directly to the basal lamina beneath the keratinocytes?

In the stratum granulosum of the skin,keratinocytes are filled with basophilic keratohyaline granules.These granules form as a result of which intracellular process?

The abundant,clear cells found in eccrine sweat glands are specialized for:

The Cell

Epithelium and Exocrine Glands

Connective Tissue

Muscle Tissue

Nervous Tissue

Cartilage and Bone

Blood and Bone Marrow

Cardiovascular System

Lymphoid System

Endocrine System

Upper Digestive System

Lower Digestive System

Liver, Gallbladder, and Exocrine Pancreas

Respiratory System

Urinary System

Male Reproductive System

Female Reproductive System

Eye and Adnexa

Special Senses

Filters