What Is Most Likely To Happen To An Animal's Target Cells That Lack Receptors For Local Regulators

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Bio - ch xi

Question	Answer
1) Using the yeast signal transduction pathways, both types of mating cells release the mating factors. These factors demark to specific receptors on the correct cells,	which induce changes in the cells that atomic number 82 to jail cell fusion.
2) What is most likely to happen to an animate being'south target cells that lack receptors for local regulators?	They might not be able to multiply in response to growth factors from nearby cells.
4) Which of the following is characterized by a cell releasing a signal molecule into the environment, followed by a number of cells in the firsthand vicinity responding?	paracrine signaling
9) When a neuron responds to a detail neurotransmitter by opening gated ion channels, the neurotransmitter is serving as which part of the signal pathway?	signal molecule
xi) Which of the following is truthful for the signaling system in an animal cell that lacks the ability to produce GTP?	It would not be able to activate and inactivate the G protein on the cytoplasmic side of the plasma membrane.
12) Testosterone functions inside a cell by	binding with a receptor protein that enters the nucleus and activates specific genes.
13) Which of the following is truthful of transcription factors?	They control gene expression.
xiv) One of the major categories of receptors in the plasma membrane reacts past forming dimers, adding phosphate groups, and then activating relay proteins. Which blazon does this?	receptor tyrosine kinases
15) Because most receptors are membrane proteins, which of the post-obit is usually true?	They change their conformation after binding with signal polypeptides.
xvi) Since steroid receptors are located intracellularly, which of the following is true?	The steroid/receptor complex can cantankerous the nuclear membrane.
19) In general, a signal transmitted via phosphorylation of a series of proteins	brings a conformational modify to each poly peptide.
21) Which of the following is the best explanation for the disability of a specific animal cell to reduce the Ca2+ concentration in its cytosol compared with the extracellular fluid?	insufficient ATP levels in the cytoplasm
23) Which of the following would be inhibited past a drug that specifically blocks the addition of phosphate groups to proteins?	receptor tyrosine kinase activity
27) Caffeine is an inhibitor of phosphodiesterase. Therefore, the cells of a person who has recently consumed java would accept increased levels of	cAMP.
28) If a pharmaceutical company wished to pattern a drug to maintain low blood sugar levels, one approach might be to pattern a compound	to cake 1000 protein activity in liver cells.
31) Which of the following statements is truthful of signal molecules?	Protein kinase A activation is 1 possible effect of signal molecules binding to Thou protein-coupled receptors.
34) Which of the following is the best explanation for the fact that most transduction pathways have multiple steps?	Multiple steps provide for greater possible amplification of a bespeak.
36) The function of phosphatases in signal transduction is best described as to	inactivate poly peptide kinases and turn off the point transduction.
37) What explains the increased concentration of Ca++ in the ER?	Calcium ions are actively imported from the cytoplasm into the ER.
39) A drug designed to inhibit the response of cells to testosterone would near certainly result in which of the post-obit?	a decrease in transcriptional activity of certain genes
xl) At puberty, an adolescent female person body changes in both structure and function of several organ systems, primarily under the influence of changing concentrations of estrogens and other steroid hormones. How can one hormone mediate so many effects?	Estrogen binds to specific receptors within many kinds of cells, each of which have different
49) In inquiry on aging (both cellular aging and organismal aging), it has been found that aged cells do not progress through the jail cell cycle equally they had previously. Which of the following would provide evidence that this is related to cell signaling?	Growth factor ligands do not bind as efficiently to receptors.
50) Where do apoptotic signals come from?	all of the to a higher place: the nucleus,the ER, ligand bounden, mitochondrial poly peptide leakage

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