Ch.10 - Cell SignalingWorksheetSee all chapters
All Chapters
Ch.1 - Introduction to Biology
Ch.2 - Chemistry
Ch.3 - Water
Ch 4. - Biomolecules
Ch. 5 - Cell Components
Ch.6 - The Membrane
Ch.7 - Energy and Metabolism
Ch.8 - Respiration
Ch.9 - Photosynthesis
Ch.10 - 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
Introduction to Cell Signaling
Classes of Signaling Receptors
Types of Cell Signaling
Signal Amplification

Concept #1: Introduction to Cell Signaling

Practice: The cells of multicellular organisms use a variety of molecules as signals which are

a) Amino acids and proteins.

b) Nucleotides and lipids.

c) Dissolved gases like nitric oxide.

d) Only a and b.

e) a, b, and c.

Practice: Which of the following is likely to be a response by a receptor protein to an approaching signal molecule?

a) The receptor protein binds to the signal if it has a complementary shape.

b) If the signal is able to bind to the receptor it induces a change in the receptor protein's shape.

c) The change in the receptor protein's shape results in cellular action.

d) All of the above are correct.

Concept #2: 3 Steps of Cell Signaling

Practice: Signal transduction pathways:

a) Are necessary for signals to cross the membrane.

b) Include the intracellular events caused by a signal binding to a receptor.

c) Include the extracellular events caused by a signal binding to a receptor.

d) Carry a signaling molecule to the nucleus of a cell.

Practice: What does it mean to say that a signal is transduced?

a) The signal enters the cell directly and binds to a receptor inside.

b) The physical form of the signal changes as it passes from the cell membrane to the intracellular target.

c) The signal is amplified, such that even one signal molecule evokes a large response.

d) The signal triggers a sequence of phosphorylation events inside the cell.