chapter 10 homework assignment

epidermolysis bullosa is a set of rare genetic disorders that is caused by

a keratin gene that disturbs intermediate filaments, weakening connections between epidermal cell layer

A decrease in cell-cell adhesion was caused by the introduction of an experimental substance that compromised the structural integrity of the tissue. Which type of cell junction would most likely be affected by this treatment given that the treatment caused a decrease in the strength of cell-cell adhesion?

adherens junction

which of the choices matches a type of cell junction with its proper cytoskeletal element and cell adhesion molecule desmosome, microfilament, integrin adherens junction, microfilament, cadherin desmosome, microtubule, integrin tight junction, cadherin, intermediate filament

adherens junction, microfilament, cadherin

epithelial tissue is found lining the lungs lining blood vessels lining the gastrointestinal tract on the outer surface of the body all of the above

all of the above

evidence that cytoskeletal elements have ancient origins comes from the: presence of cytoskeletal elements in both eukaryotes and prokaryotes ability to form functional hybrid microfilaments from actin monomers taken from distantly related organisms observation that both prokaryotes and eukaryotes use cytoskeletal elements to assist cell division sequence similarities of cytoskeletal elements when comparing distantly related organisms all of the above

all of the above

which of the choices enable the movement of cells? microtubules only intermediate filaments only microtubules and microfilaments microfilaments only microfilaments and intermediate filaments

microtubules and microfilaments

what is the sequence in which the plant cell wall is synthesized

middle lamella, primary cell wall, secondary cell wall

how does the extra cellular matrix affect what it surrounds?

the cells shape depends in part on the structure and composition of the extracellular matrix the genes that the cell expresses depend in part on the types of proteins in the extracellular matrix

suppose there is a mutation in a laminin-binding integrin gene that causes a loss of function in the cytoplasmic domains of the integrin. which one of the outcomes could you expect to observe as a result of this mutation

the strength of tissues would decrease because the integrin could no longer associate with microfilaments

A patient in a physician's office has a deep cut, and as it is being stitched up, a sample of tissue is taken for testing. Analysis of the tissue reveals it has few cells, surrounded by a large amount of extracellular matrix proteins with some blood vessels, sweat glands, and nerve cells. What kind of tissue is this?

the tissue is most likely dermis, and should also have some fibroblasts, but few keratinocytes and melanocytes