CAMPBELL BIOLOGY-EBOOK
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ISBN: 9780134443959
Author: Urry
Publisher: PEARSON
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Chapter 45, Problem 5TYU
Summary Introduction
Introduction:
Endocrine cells secrete hormones into the extracellular fluids, which are signaling molecules. The secreted hormones reach target cells through the bloodstream. Hormones bind only to specific cells based on the corresponding receptors and they act through chemical signals. They maintain homeostasis and regulate growth, development, blood pressure,
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Chapter 45 Solutions
CAMPBELL BIOLOGY-EBOOK
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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- A physician sees a patient whose symptoms include sluggishness, depression, and intolerance to cold. After eliminating other possible causes, the doctor diagnoses a hormone problem. What disorder fits the symptoms? Why does the doctor suspect that the underlying cause is a malfunction of the anterior pituitary gland?arrow_forwardSteroid hormones ... a) ... transmits its effects mainly by binding to membrane receptors. b) ... are water soluble. c) ... conveys its effects mainly through so-called second messengers. d) ... is transported in the blood by means of carrier protein.arrow_forwardIdentify molecule (1) in the pathway of hormonal regulation illustrated below: (A) ion channel (B) G protein-coupled receptor (C) tyrosine kinase receptor (D) cytoplasmic/nuclear receptorarrow_forward
- Virtually all of the protein or amino acid-based hormones exert their effects through an intracellular O a) ions O b) deactivators c) receptors O d) second messengers Ston sharing Hidearrow_forwardWhat structural distinction exists between an enzyme and a hormone?arrow_forwardA steroid hormone approaches its target cell. Which of the following happens first? a)The hormone enters the nucleus. b)The hormone passes through the cell membrane. c)The hormone and its receptor bind to the cell's DNA. d) The hormone and its receptor enter the cell's nucleus.arrow_forward
- Which of the following observations can be explained by the properties of hormone receptors? a) A certain tissue can react to more than one hormone b) A certain hormone affects only a specific tissue, not all tissues c) Some tissues react very quickly to a certain hormone, other tissues take many hours to react to the same hormonearrow_forwardWhich of the following is not a true statement? A.) steroid and thyroid hormone signaling would be impaired if the plasma level of carrier proteins is not optimal. B.) Steroid and thyroid hormone-receptor complexes form dimers when they bind to the hormone-response elements on DNA C.) Epinephrine uses the adenylate cyclase and the phospholipase C second messenger systems D.) signaling by a peptide hormone would be impaired if a second messenger system is not functional in the target cell E.) signaling by a steroid hormone would be hindered if the adenylated cyclase second messenger system is not functional in the target cell.arrow_forwardThree membrane receptor proteins bind tightly to a hormone. Based on the data in the table below, (a) what is the Kd for hormone binding byprotein 2? (Include appropriate units.) (b) Which of these proteins binds most tightly to this hormone?arrow_forward
- The relationship between the insect hormones ecdysteroid and PTTH is an example of (A) an interaction of the endocrine and nervous systems. (B) homeostasis achieved by positive feedback. (C) homeostasis maintained by antagonistic hormones. (D) competitive inhibition of a hormone receptor.arrow_forwardWhat's the key distinction between a hormone and a neurotransmitter?arrow_forwardList the hormones secreted by the following:(a) Hypothalamus (b) Pituitary (c) Thyroid (d) Parathyroid(e) Adrenal (f) Pancreas (g) Testis (h) Ovary (i) Thymus (j) Atrium (k) Kidney (l) G-I Tractarrow_forward
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