EXAM 1

EXAM 1What is a good definition of a plasma membrane?A bi-layer of phospholipids surrounding a single cell.A barrier that separates intracellular structures from extracellular fluid.A structure containing proteins that help move molecules in and out of the cell.B and C onlyAll of the above.What is a good definition of a plasma membrane?A bi-layer of phospholipids surrounding a single cell.A barrier that separates intracellular structures from extracellular fluid.A structure containing proteins that help move molecules in and out of the cell.B and C onlyAll of the above.The muscle cells of the heart are connected in such a way that allows for the fast propagation of chemical signals and connections that provide resistance to stretch. Which of the following cell-cell adhesion molecules would you expect to find between the cells of the heart?

A. Gap junctionsB. Tight junctionsC. DesmosomesD. A and CE. A, B, and C

The muscle cells of the heart are connected in such a way that allows for the fast propagation of chemical signals and connections that provide resistance to stretch. Which of the following cell-cell adhesion molecules would you expect to find between the cells of the heart?

A. Gap junctionsB. Tight junctionsC. DesmosomesD. A and CE. A, B, and C

A macrophage is a highly mobile disease fighting cell that moves readily through the tissues of the body. Which of the following elements of the cytoskeleton would be more abundant in a macrophage than in a cell that doesnt move around?

Golgi apparatusIntermediate filamentsMicrofilamentsMicrotubulesRough ER

A macrophage is a highly mobile disease fighting cell that moves readily through the tissues of the body. Which of the following elements of the cytoskeleton would be more abundant in a macrophage than in a cell that doesnt move around?

Golgi apparatusIntermediate filamentsMicrofilamentsMicrotubulesRough ERTay-Sachs is a disease characterized by the build up of a particular lipid molecule in the neuronal cells of the brain causing premature cell death throughout the nervous system. The result is a rapid decline of physical and mental abilities, ending in death (typically by age 5). The malfunction of which cell organelle plays a major role in this disease?

MitochondriaGolgi apparatusMicrofilamentsLysosomesSmooth endoplasmic reticulum Tay-Sachs is a disease characterized by the build up of a particular lipid molecule in the neuronal cells of the brain causing premature cell death throughout the nervous system. The result is a rapid decline of physical and mental abilities, ending in death (typically by age 5). The malfunction of which cell organelle plays a major role in this disease?

MitochondriaGolgi apparatusMicrofilamentsLysosomesSmooth endoplasmic reticulum Which type of cell junction would limit exchange of materials between a tissue layer and the environment?Tight junctionDesmosomeGap JunctionWhich type of cell junction would limit exchange of materials between a tissue layer and the environment?Tight junctionDesmosomeGap JunctionYou have been asked by a prestigious research company to develop an epithelial membrane that will be able to make a large amount of proteins and will be able to effectively transport products across the epithelial membrane. Ask yourself the following questions:

- what type of organelle would you need the most of?- what type of cell would you most likely need?- will the organization be simple or stratified?

What type of organelle would you need the most of?MitochondriaRough endoplasmic reticulumSmooth endoplasmic reticulumGolgi apparatusLysosomesWhat type of organelle would you need the most of?MitochondriaRough endoplasmic reticulumSmooth endoplasmic reticulumGolgi apparatusLysosomesWhat type of cell would you need and how would they be organized?Squamous; simpleSquamous; stratifiedCuboidal; stratifiedColumnar; simpleTransitional What type of cell would you need and how would they be organized?Squamous; simpleSquamous; stratifiedCuboidal; stratifiedColumnar; simpleTransitional You poke your finger into your mouth. Which of the following does your finger directly contact?Serous membraneMucous membraneEpitheliumA and CB and CYou poke your finger into your mouth. Which of the following does your finger directly contact?Serous membraneMucous membraneEpitheliumA and CB and CWhich of the following statements is NOT true of the skin. A. the skin is involved in gas exchange

B. the skin can excrete several liters of fluid each day

C. the skin is a water-resistant organ

D. the skin has sensory structures

E. the skin protects deeper tissues from bacteria19Which of the following statements is NOT true of the skin. A. the skin is involved in gas exchange

B. the skin can excrete several liters of fluid each day

C. the skin is a water-resistant organ

D. the skin has sensory structures

E. the skin protects deeper tissues from bacteria20Which layer of the epidermis would you expect to thicken to form a callus? Select all that apply

A. stratum basaleB. stratum spinosumC. stratum granulosumD. stratum lucidumE. stratum corneum21Which layer of the epidermis would you expect to thicken to form a callus? Select all that apply

A. stratum basaleB. stratum spinosumC. stratum granulosumD. stratum lucidumE. stratum corneum22All of these skin appendages are said to be epidermal derivatives. What does that tell you about these structures?

A. they are not part of the epidermisB. they are mutations of epidermal cellsC. they are deep to the epidermisD. they are formed from epidermal tissue23All of these skin appendages are said to be epidermal derivatives. What does that tell you about these structures?

A. they are not part of the epidermisB. they are mutations of epidermal cellsC. they are deep to the epidermisD. they are formed from epidermal tissue24Your skeletal system is an organ system. In addition to bone and cartilage, which of the following would you find comprising the skeletal system?

A. NervesB. Blood vessels C. Epithelial tissuesD. All of the aboveE. None of the above25Your skeletal system is an organ system. In addition to bone and cartilage, which of the following would you find comprising the skeletal system?

A. NervesB. Blood vessels C. Epithelial tissuesD. All of the aboveE. None of the above26What kind(s) of fibers can be secreted by the chondroblasts?Collagen, reticular, and elasticCollagen and reticularCollagen and elasticElastic onlyNo fibers are found in cartilageHuman Anatomy, 5eby Marieb, Mallatt, and WilhelmCopyright 2008 Pearson Education, Inc.,publishing as Benjamin Cummings.What kind(s) of fibers can be secreted by the chondroblasts?Collagen, reticular, and elasticCollagen and reticularCollagen and elasticElastic onlyNo fibers are found in cartilageHuman Anatomy, 5eby Marieb, Mallatt, and WilhelmCopyright 2008 Pearson Education, Inc.,publishing as Benjamin Cummings.