Connexins Study guides, Revision notes & Summaries

How are cells connected to each other and the extra-cellular matrix? correct answers -gap junctions -tight junctions -anchorning junctions How do we classify epithelial tissue? correct answers -cell shape -number of layers What is a Gap junction? correct answers Mediates cell to cell communication, Aggregates of intercellular channels that permit direct cell to cell transfer of ions and small molecules, What does a gap junction do? correct answers -connects to the cytoplasm in adja...

Shortly after delivery, a full term male newborn is found to have black hair with a white forelock. His mom, has white forelock & hearing aids. Heterochromia of irides. Bilateral sensorineural hearing loss. Cause of findings? A) abnormal neural crest development B) abnormality of connexins C) Deficiency of homogentistic acid oxidase activity D) Deficiency of tyrosinase activity E) Failure of internalization of melanin granules of keratinocytes F) Failure of melanosome transportation a...

AP Biology: Cells Latest Version with Complete Solutions Active Transport Movement of solutes against a gradient, requiring the expenditure of energy Adhesion Proteins Attach cells to neighboring cells and give cell stability Anchoring Junctions Protein attachments between adjacent animal cells; desmosomes bind adjacent cells together and are associated with protein filaments that extend into the cell interior to hold structures together Bulk Flow Collective movement of substan...

Gap Junctions - What are the Attachments between cells that permit intercellular communication Connexins - What are the Channel proteins that permit communication in gap junctions Tight junctions (zonula occludens) - What Prevents paracellular movement of solutes between cells Increased oil/water coefficient of the solute (more lipophilic) Decreased size of the solute Decreased membrane thickness - What are the three factors that increase permeability of a solute in a membrane

Integrins are transmembrane proteins that can bind to molecules called catenins which are cytoplasmic proteins and to laminins, which are extracellular protein. You would expect to find these transmembrane proteins in: a. desmosomes in epithelial cells b. hemidesmosomes in epithelial cells c. communicating junctions in connective tissue d. occluding junctions in epithelia e. a and b are correct correct answers b. hemidesmosomes in epithelial cells A consensus sequence of bases that com...

CBE 3 T/F Talking to people at a party is similar to paracrine signaling while a radio announcement is similar to autocrine. - correct answer False, paracrine signaling is party however a radio announcement is similar to endocrine signaling. Autocrine signaling would be talking to yourself All cell responds to the same signal in the same way - correct answer False, cells may respond differently to the same signal and depends on the internal workings of the cell Actin, microtubules, and in...

Biology Major Field Test Study Set "4 Biomolecules and Monomers - ANSWER Protein (amino acids) Carbohydrates (simple sugars) Lipids (glycerol and fatty acids) Nuclei acids (nucleotides)" dipeptides - ANSWER two amino acids bonded together what is the general fatty acid formula - ANSWER CH3(CH2)nCOOH where n= an even number between 12 and 24 explain identifying saturated vs. unsaturated fats - ANSWER saturated: only single bonds in hydrocarbon chain... unsaturated: one or more doubl...

BIOL 235 Chapter 4 Quiz with complete solutions | Latest 2023/2024 Describe the cell shapes in epithelial tissues and their functions (4) --Squamous - flat and thin, allow substances to pass through them Cuboidal - like cubes, sometimes have microvilli at apical surface, function in absorption or secretion Columnar - like upright rectangles, have cilia or microvilli, can also function in absorption or secretion Transitional - change from squamous to cuboidal and back - walls of ureter and...

Biology Major Field Test Study Set "4 Biomolecules and Monomers - ANSWER Protein (amino acids) Carbohydrates (simple sugars) Lipids (glycerol and fatty acids) Nuclei acids (nucleotides)" dipeptides - ANSWER two amino acids bonded together what is the general fatty acid formula - ANSWER CH3(CH2)nCOOH where n= an even number between 12 and 24 explain identifying saturated vs. unsaturated fats - ANSWER saturated: only single bonds in hydrocarbon chain... unsaturated: one or more doubl...

How are cells connected to each other and the extra-cellular matrix? correct answers -gap junctions -tight junctions -anchorning junctions How do we classify epithelial tissue? correct answers -cell shape -number of layers What is a Gap junction? correct answers Mediates cell to cell communication, Aggregates of intercellular channels that permit direct cell to cell transfer of ions and small molecules, What does a gap junction do? correct answers -connects to the cytoplasm in adja...