INTEGRATED PRINCIPLES OF ZOOLOGY
18th Edition
ISBN: 9781260411133
Author: HICKMAN
Publisher: MCG
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Chapter 22, Problem 6RQ
Summary Introduction
To determine: The action mechanism of tube feet in the sea star.
Introduction: The tube feet or cylindrical podia is connected to a series of small lateral canals, along the ambulacral groves through the radial canal. A podium is a hollow, muscular tube, with one end inside the body coelom and other end bearing the sucker. Its inner end consists of an ampulla- a muscular sac.
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Chapter 22 Solutions
INTEGRATED PRINCIPLES OF ZOOLOGY
Ch. 22 - Prob. 1RQCh. 22 - Prob. 2RQCh. 22 - How do we know that echinoderms were derived from...Ch. 22 - Prob. 4RQCh. 22 - Prob. 5RQCh. 22 - Prob. 6RQCh. 22 - What structures are involved in the following...Ch. 22 - Prob. 8RQCh. 22 - Prob. 9RQCh. 22 - Match groups in the left column with all correct...
Ch. 22 - Define the following: pedicellariae, madreporite,...Ch. 22 - Prob. 12RQCh. 22 - Give four examples of how echinoderms are...Ch. 22 - What is a major difference in function of the...Ch. 22 - What characteristics do Hemichordata share with...Ch. 22 - Distinguish Enteropneusta from Pterobranchia.Ch. 22 - For Further Thought The phylogenetic placement of...
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- 12. Which of the following molecules can absorb light? a. Pigments b. Chlorophyll c. Rhodopsin d. Carotenoids e. All of the abovearrow_forwardWhich 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_forward
- For 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_forwardA 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_forward
- Which 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_forwardIn 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_forward
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