Concept explainers
Animal cells are surrounded by ______ fluid. This fluid is_____ to thecytosol.
a. phospholipid; isotonic
b. plasma; hypertonic
c. interstitial; isotonic
d. interstitial; hypotonic
Introduction:
Animals are eukaryotes and therefore their cells are highly organized. They have a phospholipid membrane, which is bilayered and encloses the cell’s contents like organelles, proteins, and ribosomes in the cytosol.
Answer to Problem 1MC
Correct answer:
Interstitial fluid surrounds animal cells and is isotonic with respect to the cytosol.
Explanation of Solution
Justification for the correct answer:
Option (c) is given that isotonic, interstitial fluid surrounds the animal cells. This is a true statement as interstitial fluid is a part of the extracellular matrix (ECM). The water cannot enter or exit the cell because of equal concentration of solute and water in the cytosol and the interstitial fluid. Hence, option (c) is correct.
Justification for incorrect answers:
Option (a) is given that a phospholipid fluid encloses the animal cell and this fluid is isotonic. This is false as phospholipid is a component of the cell membrane and not the area surrounding it. Also, the lipid component of the membrane makes it permeable and therefore it cannot be isotonic. So, it is an incorrect option.
Option (b) is given that the hypertonic blood plasma encloses the animal cells. This is only partially true as the interstitial fluid that is a major component of the ECM actually forms the blood plasma in case of animals, but this plasma is not hypertonic. If it was true, the cells will always be in a shrunken state. So, it is an incorrect option.
Option (d) is given that an interstitial fluid surrounds the cells in animals, which is hypotonic in nature. This is a wrong statement because if the fluid surrounding the cells were to be hypotonic, the cells would always be swollen and will burst to result in cell death. So, it is an incorrect option.
Hence, options, (a), (b), and (d) are incorrect.
Thus, it can be concluded that it is the interstitial fluid, which is a part of the ECM surrounds the cells of animals. This provides an isotonic solution and hence maintains the osmotic pressure in and out of the cell.
Want to see more full solutions like this?
Chapter 5 Solutions
EBK BIOLOGY
- answer questions 1-10arrow_forwardAnswer Question 1-9arrow_forwardEx: Mr. Mandarich wanted to see if the color of light shined on a planthad an effect on the number of leaves it had. He gathered a group ofthe same species of plants, gave them the same amount of water, anddid the test for the same amount of time. Only the color of light waschanged. IV:DV:Constants:Control Gr:arrow_forward
- ethical considerations in medical imagingarrow_forwardPlease correct answer and don't used hand raiting and don't used Ai solutionarrow_forward2. In one of the reactions of the citric acid cycle, malate is oxidized to oxaloacetate. When this reaction is considered in isolation, a small amount of malate remains and is not oxidized. The best term to explain this is a. enthalpy b. entropy c. equilibrium d. free energy e. loss of energyarrow_forward
- 18. The citric acid cycle takes place in a. the chloroplasts b. the cytosol c. the inner mitochondrial membrane d. between the two mitochondrial membranes e. the mitochondrial matrix 40 WILarrow_forward8. Most reactions of anaerobic respiration are similar to a. aerobic respiration b. photosynthesis c. lactic acid fermentation d. alcoholic fermentation e. both c and darrow_forward12. Which of the following molecules can absorb light? a. Pigments b. Chlorophyll c. Rhodopsin d. Carotenoids e. All of the abovearrow_forward
- 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
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax CollegeHuman Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning
- Human Biology (MindTap Course List)BiologyISBN:9781305112100Author:Cecie Starr, Beverly McMillanPublisher:Cengage LearningHuman Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning