INTEGRATED PRINCIPLES OF ZOOLOGY
18th Edition
ISBN: 9781260411133
Author: HICKMAN
Publisher: MCG
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Chapter 30, Problem 8RQ
Summary Introduction
To relate: The function of the contractile vacuoles to the given experimental observations.
Introduction: Contractile vacuoles are special excretory organelles that are present in many single-celled eukaryotes and some freshwater sponges. They are tiny and spherical in shapes.
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Chapter 30 Solutions
INTEGRATED PRINCIPLES OF ZOOLOGY
Ch. 30 - Define homeostasis. What evolutionary advantages...Ch. 30 - Describe the physiological challenges confronting...Ch. 30 - Distinguish the terms in the following pairs:...Ch. 30 - Young downstream salmon migrants moving from their...Ch. 30 - Most marine invertebrates are osmotic conformers....Ch. 30 - Prob. 6RQCh. 30 - In what animals would you expect to find a salt...Ch. 30 - Prob. 8RQCh. 30 - Prob. 9RQCh. 30 - Prob. 10RQ
Ch. 30 - In what ways does the nephridium of an earthworm...Ch. 30 - Prob. 12RQCh. 30 - Explain how the cycling of sodium chloride between...Ch. 30 - Explain bow antidiuretic hormone (vasopressin)...Ch. 30 - Prob. 15RQCh. 30 - Large mammals live successfully in deserts and in...Ch. 30 - Prob. 17RQCh. 30 - Prob. 1FFT
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- Which of the following proteins or protein complexes is directly required for the targeting of mitochondrial inner membrane multipass proteins, such as metabolite transporters, whose signal sequence is normally not cleaved after import? OA. TIM22 OB. TIM23 C. OXA OD. Mia40 OE SAMarrow_forwardQUESTION 9 An animal cell has been wounded and has a small rupture in its plasma membrane. Which of the following is more likely to happen next? OA. The cell rapidly cleaves by cytokinesis. OB. The rate of receptor-mediati endocytosis is increased. OC. The rate of exocytosis is increased. OD. The rate of pinocytosis is increased.arrow_forwardFor the a subunit of a trimeric G protein, A. a G-protein-coupled receptor GPCR) acts as a guanine nucleotide exchange factor (GEF), whereas a regulator of G protein signaling (RGS) can act as a GTPase-activating protein (GAP). B. a GPCR acts as a GAP, whereas an RGS can act as a GEF. C. both a GPCR and an RGS can act as a GEF. O D. both a GPCR and an RGS can act as a GAP OE. None of the above.arrow_forward
- A cell expresses a transmembrane protein that is cleaved at the plasma membrane to release an extracellular fragment. The fragment binds to receptor proteins on nearby cells and activates signaling pathways resulting in altered gene expression patterns in the cells. What form of intercellular signaling does this represent? OA. Contact-dependent signaling B. Paracrine signaling OC. Synaptic signaling D. Endocrine signaling E. Autocrine signalingarrow_forwardWhich of the following drive nuclearly encoded proteins import into the mitochondrial matrix? OA. ATP hydrolysis OB. Membrane Potential OC. K+ Ions OD. A and B OE. None of the abovearrow_forwardWhich of the following statements is true regarding Cholesterol import into the cell? OA. It is transported within LDL B. Receptor mediated endocytosis is involved OC. Release of cholesterol occurs in the Lysosome D. All of the above are true statements OE. None of the above are true statementsarrow_forward
- In which of the following schematic drawings of signaling pathways does the activation of the receptor lead to gene expression? Activating and inhibitory steps are indicated with (+) and (-), respectively. OA OB ㅇㅂㅇㅂㅇㅁ (+) Gene Expression Activated Signaling proteins Transcription receptor activator Bl D Gene Expression Gene Expression ㅁㅁㅇ Gene Expression Gene Expressionarrow_forwardWhich of the following events normally activates a GTP-binding protein? OA. GTP hydrolysis by the protein OB. Activation of an upstream GTPase-activating protein OC. Activation of an upstream guanine nucleotide exchange factor OD. Phosphorylation of a bound GDP molecule by an upstream phosphorylase OE. Pi release after GTP hydrolysisarrow_forwardProteins that are synthesized on the Rough ER are imported into the ER lumen after their signal sequence is recognized. Which of the following is responsible for the signal recognition? OA. Signal Recognition Particle, OB. Signal Sequence C. Stop-transfer sequence OD. Both B and C OE. None of the abovearrow_forward
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