Campbell Biology (11th Edition)
11th Edition
ISBN: 9780134093413
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Question
Chapter 45.3, Problem 2CC
Summary Introduction
To explain: Why local cortisone injection in an inflamed joint is preferred over the administration of pill.
Concept introduction:
The adrenal cortex acts through the endocrine system under the stressful conditions such as reduced level of blood sugar, volume, and pressure. It stimulates the hypothalamus to secrete the releasing hormone. Then, the releasing hormone stimulates the secretion of the adrenocorticotropic hormone (ACTH) from the anterior pituitary. From the pituitary, ACTH reaches the adrenal cortex through blood circulation and stimulates corticosteroids secretion. Two types of corticosteroids are found in humans namely glucocorticoids (cortisol) and mineralocorticoids. Glucocorticoids or cortisol activates glucose synthesis from protein and are also involved in the breakdown of proteins into amino acids in muscles and influence the immune system.
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Maximum contraction strength is achieved when, prior to contraction, the H zone contains no myosin heads.
a) true
b) false
If you were able to control fatigue in the muscle cell experimentally such that you only exposed the muscle to high levels of Pi and no other metabolites, what would you observe?
A decline in force without much change in velocity
A decline in velocity without much change in force
A muscle operating below Lo
A decline in both force and velocity
An increased affinity of Ca2+ for troponin
Discuss "the basal lamina of muscle fibers serves as a molecular bulletin board, in which adjoining cells can post messages that direct the differentiation and function of the underlying cells".
Chapter 45 Solutions
Campbell Biology (11th Edition)
Ch. 45.1 - How do response mechanisms in target cells differ...Ch. 45.1 - What type of gland would you expect to secrete...Ch. 45.1 - WHAT IF? Predict what would happen if you...Ch. 45.2 - What are the roles of oxytocin and prolactin in...Ch. 45.2 - How do the two fused glands of the pituitary gland...Ch. 45.2 - WHAT IF? 2192 Propose an explanation for why...Ch. 45.2 - what if? Lab tests of two patients, each...Ch. 45.3 - If a hormone pathway produces a transient response...Ch. 45.3 - Prob. 2CCCh. 45.3 - Prob. 3CC
Ch. 45 - MAKE CONNECTIONS What forms of signaling activate...Ch. 45 - Which major endocrine organs described in Figure...Ch. 45 - Prob. 45.3CRCh. 45 - Which of the following is not an accurate...Ch. 45 - Prob. 2TYUCh. 45 - Growth factors are local regulators that (A) are...Ch. 45 - Prob. 4TYUCh. 45 - Prob. 5TYUCh. 45 - Which of the following is the most likely...Ch. 45 - The relationship between the insect hormones...Ch. 45 - DRAW IT In mammals, milk production by mammary...Ch. 45 - Prob. 9TYUCh. 45 - Prob. 10TYUCh. 45 - Level 3: Synthesis/Evaluation 11. WRITE ABOUT A...Ch. 45 - Prob. 12TYU
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