Human Biology (MindTap Course List)
11th Edition
ISBN: 9781305112100
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Textbook Question
Chapter 3, Problem 3SQ
Cell membranes consist mainly of a _________.
- a. carbohydrate bilayer and proteins
- b. protein bilayer and phospholipids
- c. phospholipid bilayer and proteins
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Hydrophilic substances cannot pass straight through the plasma membrane due to the ________.
a.
physical size limitations of the bilayer
b.
hydrophobic heads surrounding the bilayer
c.
hydrophobic tails in the center of the bilayer
The main function of plasma membranes is to ________.
a.
physically protect the cell
b.
separate the internal environment of the cell from the environment
c.
ensure the cell properly communicates with stimuli
The three major parts of a cell are____________________ . a. the nucleus, the nucleolus, and the nuclear envelope b. the nucleus, cytoplasm, and the cell membrane c. a nerve cell, an epithelial cell, and a muscle cell d. endoplasmic reticulum, Golgi apparatus, and ribosomes.
Chapter 3 Solutions
Human Biology (MindTap Course List)
Ch. 3 - Describe the general functions of the following in...Ch. 3 - Which organelles are in the endomembrane system?Ch. 3 - Distinguish between the following pairs of terms:...Ch. 3 - What do enzymes do in metabolic reactions?Ch. 3 - In aerobic cellular respiration, which reactions...Ch. 3 - For the diagram of the aerobic pathway shown in...Ch. 3 - The plasma membrane __________. a. surrounds the...Ch. 3 - The _________ is responsible for a eukaryotic...Ch. 3 - Cell membranes consist mainly of a _________. a....Ch. 3 - Prob. 4SQ
Ch. 3 - The passive movement of a solute through a...Ch. 3 - Match each organelle with its correct function.Ch. 3 - Which of the following statements is not true?...Ch. 3 - Enzymes _______. a. enhance reaction rates b. are...Ch. 3 - Match each substance with its correct descriptionCh. 3 - Cellular respiration is completed in the ______....Ch. 3 - Prob. 11SQCh. 3 - In a mitochondrion, where are the electron...Ch. 3 - Prob. 1CTCh. 3 - Jogging is considered aerobic exercise because the...Ch. 3 - Section 3.17 mentions that arsenic poisons human...Ch. 3 - The cells of your body never use nucleic acids as...
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- ________ is the process of a cell taking in needed molecules from the extracellular fluid. a. Phagocytosis b. Receptor-mediated endocytosis c. Pinocytosisarrow_forward________ form specialized sites on the cell surface that allow cells to recognize each other. a. Cholesterols b. Carbohydrates c. Phospholipidsarrow_forwardRibosomes are not considered true organelles because they are found in both prokaryotic and eukaryotic cells. A. True B. Falsearrow_forward
- _____keep fluid from leaking between cells. a. Tight junctions c. Gap junctions b. Adhering junctions d. Fibroblastsarrow_forward______increase the surface area of some epithelial cells. a. Microfilaments c. Gap junctions b. Microvilli d. Adhering junctionsarrow_forwardThe tails of the phospholipids of the plasma membrane are composed of _____ and are _______? a. phosphate groups; hydrophobic b. fatty acid groups; hydrophilic c. phosphate groups; hydrophilic d. fatty acid groups; hydrophobicarrow_forward
- Which of the following is NOT a component of the cell plasma membrane? A. cholesterol B. proteins C. microfi laments D. phospholipidsarrow_forwardWhich of the following represent ground substance in extracellular matrix? a. elastin b. proteoglycans c. collagen d. reticular proteinsarrow_forwardCellular organization (e.g. movement of organelles) is facilitated by __________. Cells are capable of resisting mechanical stress due to the presence of _________. Select one: a. microtubles, intermediate filaments b. actin, microtubules c. actin, intermediate filaments d. microtubles, actin e. intermediate filaments, actin Clear my choicearrow_forward
- True or False _____ a. the cell membrane is a selectively permeable or semi-permeable structure. _____b. Different proteins found in the membrane play specific roles in cell transport _____c. The lipid bilayer prevents polar molecules from easily passing through _____d. Water molecules cannot pass through the lipid bilayer of the cell membranearrow_forwardWhat type of cell is found in a layer of cells of which the exterior layer is made of flattened-shaped cells? a.skeletal muscle cells b.red blood cells c.stratified squamous epithelial cells d.nerve cells e.all of the cell typesarrow_forwardMark the following statements about the plasma membrane as true or false. If a statement is false, correct it to make a true statement. a. _____ Integral membrane proteins generally span the width of the plasma membrane, whereas peripheral proteins are found on only one side of the membrane. b. _____ Cholesterol provides the plasma membrane with stability in the face of changing ion concentrations . c. _____ Membrane cholesterol is vitally important for cell-cell recognition. d. _____ Membrane proteins often function as channels or carriers. e. _____ The overall structure of the plasma membrane is a mosaic with the components locked tightly in placearrow_forward
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