AP Biology Study Guide Chapter 11 1. Categorize chemical signals in terms of the proximity of the communicating cells. Local signaling – a. Paracrine signaling – a secreting cell acts on nearby target cells by discharging molecules of a local regulator (a growth factor‚ for example) into the extracellular fluid. b. Synaptic signaling – a nerve cell releases neurotransmitter molecules into a synapse‚ stimulating the target cell. Long distance signaling- c. Hormonal signaling – specialized
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Chapter 09 Cell Communication Multiple Choice Questions 1. The protein Sonic Hedgehog (SHH) plays a role in specifying the identity of digits (such as fingers and toes) in mammals. Several digits arise directly from cells that both express and respond to secreted SHH. What type of signaling would this be considered? A. Direct contact B. Paracrine C. Endocrine D. Synaptic E. Autocrine If a cell responds to the ligand that it secretes‚ this is considered autocrine signaling.
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SYMPOSIUM Takashi Aoyama • Atsuhiro Oka Cytokinin signal transduction in plant cells Received: February 4‚ 2003 / Accepted: March 8‚ 2003 / Published online: April 17‚ 2003 Abstract Cytokinins regulate various events in plant development according to the intrinsic developmental program and in response to environmental stimuli. Recent genetic and molecular biological studies have revealed the framework of the intracellular signal transduction pathway from cytokinin perception to transcriptional
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STUDY QUESTIONS FOR TEST 3 (Major concepts)—CHAPTERS 5‚ 6‚ 7 This study guide does not include everything you need to know for the exam. It an overview of main topics that I thought were important in lecture—make sure you’ve studied your book‚ completed the questions at the end of each chapter‚ answered all of the study guide questions‚ and taken the practice exam a few times! I would recommend either writing out the answers or‚ if you’re studying with someone else‚ talk through these questions.
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Chapter 14: Signal Transduction Mechanisms: Messengers and Receptors Signal Transduction Mechanisms: II. Messengers and Receptors In the second major means of intercellular communication the signal is transmitted by regulatory chemical messengers Receptors are located on receiving cells that can be quite distant from the secreting cell Chemical Signals and Cellular Receptors Cells produce signals‚ in some cases by displaying molecules on their surfaces or by releasing a chemical signal Multicellular
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or in the target cell’s nucleus Once a hormone is recognized by its target tissue or tissues‚ it can exert its biologic action by a process known as signal transduction PRINCIPLES OF ENDOCRINE FUNCTIION Chemical signalling can occur through endocrine‚ paracrine or autocrine pathways In classic endocrine signalling‚ a hormone carries a signal from a secretory gland across a large distance to a target tissue Hormones secreted into the extracellular space can also resulate nearby cells without
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signaling in immunorecognition (signal transduction) G Ligand (primary 0 messenger) 0.0 shapeType75fBehindDocument1pWrapPolygonVertices8;18;(8674‚879);(15125‚879);(15125‚145);(21500‚145);(21500‚1540);(14509‚1540);(14509‚21497);(3531‚21497);(3531‚19296);(3607‚19296);(3607‚15187);(2071‚15187);(2071‚2713);(0‚2713);(0‚0);(3223‚0);(3223‚806);(8674‚806)posrelh0posrelv0pib Receptor-ligand binding CYTOSOL Cellular responses Signal transduction (via second messengers) sh
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Lecture 8 & 9 1. What are the components of signal transduction 2. What is the plant brassinosteroid pathway 3. What do phosphatases do 4. What is the abscisic acid pathway 5. What receptors are present in the a. b. Plasma membrane c. E.R. d. Cytoplasm e. Nucleus 6. 7. What does activation of phototropin and phytochrome do 8. What are the three diff interactions of signal transduction pathways 9. What is photomorphogenesis
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Chapter 15 Signal Transduction 1) Endocrine‚ paracrine ‚ autocrine signaling‚ and cell-cell contact (Fig. 15-2). Endocrine signaling is long distance signaling. An example would be pancreatic cells secreting insulin. Paracrine signaling is for close proximity. An example would be a nerve cell releasing neurotransmitters. In autocrine signaling the cell that produces the ligand also contains the receptor for that ligand. This is how cancer cells work. In signaling by plasma membrane attached
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Chapter 11: Cell Communication Concept 11.1 External signals are converted to responses within the cell. I. Evolution of Cell Signaling 1. signal transduction pathway. a specific cellular response in a series of steps 2. signaling mechanisms first evolved in ancient prokaryotes and unicellular eukaryotes‚ then adopted for new uses 3. quorum sensing. allows bacterial populations to coordinate behaviors to carry out activities only productive when performed by a given number of cells
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