Ch.11 - Cell SignalingSee all chapters
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Ch.1 - Introduction to Biology
Ch.2 - Chemistry
Ch.3 - Water
Ch.4 - Carbon
Ch.5 - Biological Molecules
Ch.6 - Cells
Ch.7 - The Membrane
Ch.8 - Energy and Metabolism
Ch.9 - Respiration
Ch.10 - Photosynthesis
Ch.11 - Cell Signaling
Ch.12 - Cell Division
Ch.13 - Meiosis
Ch.14 - Mendelian Genetics
Ch.15 - Chromosomal Theory of Inheritance
Ch.16 - DNA Synthesis
Ch.17 - Gene Expression
Ch.18 - Regulation of Expression
Ch.19 - Viruses
Ch.20 - Biotechnology
Ch.21 - Genomics
Ch.22 - Development
Ch.23 - Evolution by Natural Selection
Ch.24 - Evolution of Populations
Ch.25 - Speciation
Ch.26 - History of Life on Earth
Ch.27 - Phylogeny
Ch.28 - Prokaryotes
Ch.29 - Protists
Ch.30 - Plants
Ch.31 - Fungi
Ch.32 - Overview of Animals
Ch.33 - Invertebrates
Ch.34 - Vertebrates
Ch.35 - Plant Anatomy
Ch.36 - Vascular Plant Transport
Ch.37 - Soil
Ch.38 - Plant Reproduction
Ch.39 - Plant Sensation and Response
Ch.40 - Animal Form and Function
Ch.41 - Digestive System
Ch.42 - Circulatory System
Ch.43 - Immune System
Ch.44 - Osmoregulation and Excretion
Ch.45 - Endocrine System
Ch.46 - Animal Reproduction
Ch.47 - Nervous System
Ch.48 - Sensory Systems
Ch.49 - Muscle Systems
Ch.50 - Ecology
Ch.51 - Animal Behavior
Ch.52 - Population Ecology
Ch.53 - Community Ecology
Ch.54 - Ecosystems
Ch.55 - Conservation Biology

Cell Signaling

See all sections
Cell Signaling
Transduction and Response

Concept #1: Cell Signaling and Yeast Mating

Concept #2: Local and Long-Distance Signaling

Concept #3: Synaptic Signaling and Quorum Sensing

Additional Problems
The space into which neurotransmitters are released is called a chemicala.  synapseb.  junctionc.  channeld.  desmosomee.   vesicle
Specific protein receptors are present for all of the following excepta.  signal amplificationb.  signal transductionc.  intracellular receptors binding to DNAd.  signaling to other cellse.  direct signaling
The cells of multicellular organisms use a variety of molecules as signals which area.  amino acids and proteinsb.  nucleotides and lipidsc.  dissolved gases like nitric oxided.  only a and be.   a, b, and c
Communication between cells can occur by all of the following basic mechanisms excepta.  direct contactb.  paracrine signalingc.  endocrine signalingd.   synaptic signalinge.   none of the above 
Synaptic signaling requiresa.  hormonesb.  internal receptorsc.  genesd.  neurotransmitterse.   lipids
Communication between cells can occur by all of the following basic mechanisms excepta. direct contact.b. intracellular signaling.c. paracrine signaling.d. endocrine signaling.e. synaptic signaling.
Synaptic signaling requires which of the following to be released into the synaptic gap?a. hormonesb. internal receptorsc. genesd. neurotransmitterse. lipids
Long-lived; affects cells very distant from the releasing cell.a. paracrine signalingb. direct contactc. endocrine signalingd. synaptic signaling
Short lived singals, used by nerve cells.a. Paracrine signalingb. Direct contactc. Endocrine signalingd. Synaptic signaling
Short-lived signals, causing local effects.a. Paracrine signalingb. Endocrine signalingc. Synaptic signaling
The protein Sonic Hedgehog (SHH) plays a role in specifying the identity of digits (such as fingers, etc.) in mammals. Several digits arise directly from cells that both express and respond to secreted SHH. In this case, SHH is acting asa. A direct contact signal.b. An endocrine signal.c. A paracrine signal.d. An autocrine signal.
You are studying the effect of a secreted signal molecule on the activity of a cytoplasmic enzyme. Prior studies have shown the signal molecule is required for enzyme activity. You add the signal molecule to a test tube solution containing both the enzyme and its substrate. After incubating the solution, you assay for the reaction product as a measure of enzyme activity, however, no product was detected. By comparison, when you add the signal molecule to a vial containing intact cells, you are able to detect the reaction product. Which of the following statements is inconsistent with these experimental results?a. The cells express a receptor for the signal molecule.b. There is no direct interaction between the signal molecule and enzyme.c. The cells facilitate a direct protein-protein interaction between the signal molecule and enzyme.d. Binding of the signal molecule to its receptor initiates a signal transduction pathway leading to enzymatic activity.
How does the space between our fingers arise?  a. The cells die by necrosis b. Mitosis of the cells is blocked c. The cells die by apoptosis d. Meiosis of the cells is blocked e. The cells become part of the fingers
___________ among cells is a hallmark of multicellular organisms.a. Communicationb. Transportc. Linkaged. Identity
Endocrine signaling involves the release of __________.a. neurotransmittersb. hormonesc. peptidesd. cells
Hormones are an example of intercellular communication known as _____________ signaling.a. neuralb. endocrinec. paracrined. autocrine
Briefly explain the difference between necrosis and apoptosis. Why is the latter part of the cell's program?
What are the three types of cell-cell signaling, and how are they different?