Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 11, Problem 12TYK
You are a Ca2+ ion in a typical animal cell. Where are you most likely located?
- a. in the nucleus
- b. in the cytoplasm
- c. in a calciosome
- d. in the endoplasmic reticulum
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A young man in his 20s has a heart attack and is rushed to the hospital. Blood is drawn, and his cholesterol level is tested and found to be very high. The doctor tells him that he has a genetic condition in which he is unable to effectively remove LDL particles containing cholesterol from his blood and into his cells. Which cellular process is not functioning normally? a. channel-mediated facilitated diffusion b. receptor-mediated endocytosis c. exocytosis d. simple diffusion?
Drawn on the picture is a skeletal muscle cell. It is surrounded by extracellular fluid high in oxygen, which has come from blood in a nearby capillary. The concentrations (measured as pressure) of oxygen (in units of millimeters of mercury) in the cytoplasm and extracellular fluid (ECF) are given.
A. Is ATP required for this transport process to occur? Explain why or why not.
B. Consider only the oxygen levels present in the cytoplasm and ECF as shown in the drawing above (no new oxygen is entering the region; no oxygen is leaving). What will the concentration of oxygen in the cytoplasm be when equilibrium is reached?
In which way are voltage-gated ion channels and active transporters similar?
a
they are required to move small permeable molecules across cell membranes
b
they are proteins which move molecules across cell membranes
c
they utilize facilitated diffusion
d
they directly require energy in the form of ATP to move molecules
e
they generate concentration gradients
Chapter 11 Solutions
Study Guide for Campbell Biology
Ch. 11 - How do plant hormones (often called plant growth...Ch. 11 - Prob. 2IQCh. 11 - Label the parts in the following diagram of an...Ch. 11 - Prob. 4IQCh. 11 - a. What does a protein kinase do? b. What is a...Ch. 11 - Prob. 6IQCh. 11 - Prob. 7IQCh. 11 - Prob. 8IQCh. 11 - a. What can one conclude from the fact that the...Ch. 11 - Prob. 1SYK
Ch. 11 - Briefly describe the three stages of cell...Ch. 11 - Some signaling pathways alter a proteins activity;...Ch. 11 - Prob. 4SYKCh. 11 - Prob. 1TYKCh. 11 - Steroid hormones a. bind to cell-surface...Ch. 11 - Prob. 3TYKCh. 11 - Prob. 4TYKCh. 11 - Which of the following is a key difference between...Ch. 11 - Many human diseases (including bacterial...Ch. 11 - Prob. 7TYKCh. 11 - If a protein is activated by the addition of a...Ch. 11 - Prob. 9TYKCh. 11 - Prob. 10TYKCh. 11 - From studying the effects of epinephrine on liver...Ch. 11 - You are a Ca2+ ion in a typical animal cell. Where...Ch. 11 - Which of the following molecules is incorrectly...Ch. 11 - Prob. 14TYKCh. 11 - Prob. 15TYK
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- The tigroid lysis is observed in a case of functional exhaustion of the neuron. It is resulted in decay of basophilic substance and brightening of the neuroplasma. What organelles changes do this phenomenon is associated with? a. Granular endoplasmic reticulum O b. Lysosomes O c. Neurofibrils d. Golgi apparatus O e. Mitochondriaarrow_forwardOne is true about smooth endoplasmic reticulum A. It lacks ribosomes B. It is site of Ca2+ sequestration C. It is involved in detoxification of organic molecules D. It is th site of steroid hormone synthesizes E. It is the site of protein synthesisarrow_forwardIndicate whether the following statements are true or false. If a statement is false, explain why it is false. a. All types of cells contain cell walls, but only some cell types possess plasma membranes. b. The distribution of specific lipids to the inner and outer leaflet is asymmetrical, or biased, in plasma membranes. C. Lateral diffusion is the movement of lipids from one layer of the membrane to the other. d. Fatty acids tails are used to embed integral, transmembrane proteins in the plasma membrane.arrow_forward
- Which of the following statements about "leak channels" in the plasma mem- brane is correct? A. Proteins that form these channels bind to solutes to allow them to pass into the cell. B. They are passageways formed by proteins to allow water and ions to move passively through the membrane. C. They allow small ions and molecules to move between adjacent cells. D. They are formed by glycoprotein and proteoglycans to allow hormones to enter cells.arrow_forwardMembrane proteins perform the following functions EXCEPT one. Which One? A. form the glycocalyx B. act as receptor proteins C. form pores to allow the passage of small solutes D. behave as enzymes.arrow_forwardPassive transport mechanism requires both the aid of proteins and the expenditure of cellular energy. While facilitated and active mechanism both needs proteins in order to transport drugs or ions across a membrane channel. * A. Both statements are INCORRECT B. Neither is CORRECT C. Only the 1st statement is INCORRECT D. Only the 2nd statement is CORRECTarrow_forward
- Which of the following Ca++ ion channels removes calcium ions from the cytoplasm of the cell? 1. voltage-gated Ca++ channels 2. Na+/Ca++ active transport pumps 3. Ca++ uniporter 4. Na+/Ca++ exchanger Group of answer choices (A) 1 and 2 (B) 1, 2, and 3 (C) 2 and 4 (D) 2, 3, and 4 (E) 3 and 4arrow_forwardWhich of the following types of proteins allow materials to move into, or out of, the cell?a. receptor proteins b. junction proteins c. enzymatic proteinsd. channel proteinsarrow_forwardif a cell has a net positive charge inside and there is a net negative charge outside the cell, which of the following is correct (if the membrane is permeable to each substance and the concentration of each is the same inside and outside the cell)? a. negative ions will move into the cell b. positive ions will move into the cell c. neutral ions will move into the cell d. negative ions will move our of the cellarrow_forward
- Plasma membranes are selectively permeable. This means: A. cholesterol cannot enter B. anything can pass in and out C.the membrane regulates the passage of the material in and out of the cell D. glucose cannot enter the cellarrow_forwardOne is NOT TRUE about endocytotic movements including pinocytosis and phagocytosis A. Phagocytosis is used against invading microorganisms B. Phagocytosis is a means of feeding in some eukaryotes such as protozoa C. Phagocytosis is important in animal nutrition D. Ingestion of plasma membrane along with extracellular fluid is a kind of pinocytosis E. The materials engulfed will be enclosed by a small portion of the ER membranearrow_forwardHepatitis C viral infection causes the Golgi apparatus in cells to degrade. Which of the following would be a likely outcome for someone infected with hepatitis C? A. Removal of foreign substances and worn-out cell components would be prevented B. Synthesized proteins would be packaged into transport vesicles at a slower rate C. Ribosomal function would decrease D. Secretory proteins would be prevented from being secretedarrow_forward
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