Campbell Biology in Focus
3rd Edition
ISBN: 9780134710679
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Rebecca Orr
Publisher: PEARSON
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Textbook Question
Chapter 2, Problem 11TYU
SCIENTIFIC INQUIRY
Female luna moths (Actias luna) attract males by emitting chemical signals that spread through the air. A male hundreds of meters away can detect these molecule and fly toward their source. The sensory organs responsible for this behavior are the tomblike antennae visible in the photograph shown here. Each filament of an antenna is equipped with thousands of receptor cells that detect the sex attractant. (a) Based on what you learned in this chapter, propose a hypothesis to account for the ability of the male moth to detect a specific molecule in the presence of many other molecules in the air. (b) Describe predictions your hypothesis enables you to make. (c) Design an experiment to test one of these predictions.
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Which of the following statements is false?
Question 11 options:
a)
Nucleotides and amino acids can act as extracellular signal molecules.
b)
Some signal molecules can bind directly to intracellular proteins that bind DNA and regulate gene transcription.
c)
Some signal molecules are transmembrane proteins.
d)
Dissolved gases such as nitric oxide (NO) can act as signal molecules, but because they cannot interact with proteins they must act by affecting membrane lipids.
General Biology IQuarter 1 – Module 5.1Disorders and Diseases resulting from Cell Malfunction
* Cnidarians (which include jellies, sea anemones and corals) are classified by a unique type of cell, the cnidocyte (see p. 647 for review), which, when
discharged, forcibly ejects a toxic barbed spear into prey. These "stinging" cells discharge when a trigger (cnidocil) on the surface of the cell is
activated by a prey, causing Ca2* to rush into the cnidocyte. Water follows the Ca2+ resulting is a high osmotic pressure which leads to the explosive
discharge of the barbed spear. Researchers have found that physical touch alone isn't enough to induce a cnidocyte discharge. Supporting cells,
which can detect prey, are connected to several cnidocytes through neural connections, help regulate groups of cnidocytes. Using the description
above, deduce the different types of sensory cells that operate cnidocyte discharge including the mechanisms that induce an action potential.
2. Calmodulin is found in smooth muscle cells and performs a similar function to troponin in striated muscle…
Chapter 2 Solutions
Campbell Biology in Focus
Ch. 2.1 - Is a trace element an essenteal element? Explain.Ch. 2.1 - Prob. 2CCCh. 2.2 - A nitrogen atom has 7 protons and the most common...Ch. 2.2 - Prob. 2CCCh. 2.2 - Prob. 3CCCh. 2.3 - Why does the structure HCCH fail to make sense...Ch. 2.3 - What holds the atoms together in a crystal of...Ch. 2.3 - If you were a phamaceutical researcher, why would...Ch. 2.4 - Which type of chemical reaction occurs faster at...Ch. 2.4 - Write an equation that uses the products of...
Ch. 2.5 - Prob. 1CCCh. 2.5 - How can the freezing of water crack boulders?Ch. 2.5 - Compared with a basic solution at pH 9, the same...Ch. 2.5 - What would be the effect on the properties of the...Ch. 2.5 - Prob. 5CCCh. 2 - The reactivity of an atom arises from A. the...Ch. 2 - Which of the following statements correctly...Ch. 2 - Many mammals control their body temperature by...Ch. 2 - We can be sure that a mole of table sugar and a...Ch. 2 - Measurements show that the pH of a particular lake...Ch. 2 - Prob. 6TYUCh. 2 - What coefficients must be placed in the following...Ch. 2 - A Slice of pizza has 500 kcal. If we could burn...Ch. 2 - Draw the hydration shells that from around a...Ch. 2 - What do climate change (see Concept 1.1) and ocean...Ch. 2 - SCIENTIFIC INQUIRY Female luna moths (Actias luna)...Ch. 2 - FOCUS ON EVOLUTION The percentage of naturally...Ch. 2 - FOCUS ON ORGANIZATION Several emergent properties...Ch. 2 - SYNTHESIZE YOUR KNOWLEDGE How do cats drink?...
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