Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 4.5, Problem 1CSC
Summary Introduction
To determine: The cell structure that directs and enacts the responses produced by growth factors.
Introduction: A cell is the basic structural and functional unit of life. They are known as the “building blocks of life”. A typical cell includes cytoplasm and other essential organelles, such as mitochondria, nucleus, chloroplast, vacuoles, and many more, that have a specific and vital role in
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During evolution, skeletal muscle became adapted to functional de-mands ranging from sudden, withdrawal movements of a startled worm, to the sustained contractions required to maintain mammalian posture, to supporting a long, fast chase across an African savanna. What are some of the fiber types in vertebrate muscle that evolved to support these kinds of activities?
The role of tropomyosin in a muscle cell is to ____.
all to cell to relax by blocking the binding sites on actin
facilitate the formation of cross-bridges between actin and myosin
Interactions between thick and thin filaments during muscle contraction occur in which sequence?
"attach to actin, detach from actin, pivot in powerstroke, return or recock"
"attach to actin, pivot in powerstroke, detach from actin, return or recock"
"attach to actin, pivot in powerstroke, return or recock, detach from actin"
"detach from actin,pivot in powerstroke, attach to actin, return or recock"
What is the role of calcium pump in muscle contractions?
pump calcium out of the sarcoplasmic reticulum against its concentration gradient to initiate contractions
remove calcium from the fluid surrounding the myofibrils to end contractions
pump calcium into the muscle cell to stimulate the release of acetylcholine
The sliding filament model depicts how myosin motors attached to actin lead to muscle contraction. This process proceeds in a precise series of events. Indicate which of the following shows the correct order of steps in the sliding filament model.
Group of answer choices
Myosin binds ATP; myosin tightly binds actin; power stroke; myosin releases actin
Myosin binds GTP; myosin releases actin; power stroke; myosin tightly binds actin
Actin binds ATP; power stroke; myosin tightly binds actin; actin releases ADP
Actin binds ADP; myosin releases actin; power stroke; actin releases ADP
Chapter 4 Solutions
Biology
Ch. 4.1 - trace the historical development of the cell...Ch. 4.1 - list the three principles of the cell theory?Ch. 4.2 - Prob. 1TCCh. 4.2 - Prob. 1CYLCh. 4.2 - Prob. 2CYLCh. 4.3 - Prob. 1CSCCh. 4.3 - describe the structure and features shared by all...Ch. 4.3 - distinguish prokaryotic from eukaryotic cells?Ch. 4.3 - Prob. 3CYLCh. 4.4 - describe the structure and function of the major...
Ch. 4.4 - Prob. 2CYLCh. 4.5 - Prob. 1CSCCh. 4.5 - Why do the chromosomes in chromatin condense in...Ch. 4.5 - Using Fig. E4 4. plot the changes in each country...Ch. 4.5 - Why is it advantageous for all cellular membranes...Ch. 4.5 - Why is it important for lysosomal enzymes to be...Ch. 4.5 - Over the years, scientists have wondered how many...Ch. 4.5 - What problems would arise if the trachea were...Ch. 4.5 - Prob. 1CYLCh. 4.5 - list the structures found in animal but not plant...Ch. 4.5 - describe the structure and function of each major...Ch. 4.5 - Prob. 1CTCh. 4 - Which of the following is/are found only in...Ch. 4 - Which of the following is not a function of the...Ch. 4 - Prob. 3MCCh. 4 - Prob. 4MCCh. 4 - Prob. 5MCCh. 4 - Prob. 1FIBCh. 4 - Prob. 2FIBCh. 4 - Prob. 3FIBCh. 4 - Prob. 4FIBCh. 4 - Prob. 5FIBCh. 4 - Two organelles that are believed to have evolved...Ch. 4 - Prob. 7FIBCh. 4 - Prob. 1RQCh. 4 - Prob. 2RQCh. 4 - Prob. 3RQCh. 4 - Describe the nucleus and the function of each of...Ch. 4 - Prob. 5RQCh. 4 - Prob. 6RQCh. 4 - Describe the structure and function of the...Ch. 4 - Prob. 8RQCh. 4 - Prob. 9RQCh. 4 - List the structures of bacterial cells that have...Ch. 4 - Prob. 1ACCh. 4 - Prob. 2ACCh. 4 - What problems would an enormous round cell...
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