Concept explainers
Which of the following would you expect to find in or on cells whose main function is absorption?
a. Microvilli
c. Gap junctions
b. Cilia
d. Secretory vesicles
Introduction:
Cells are the smallest structural and functional unit of life. The cell has many specialized structures that perform specific functions that are required for proper growth and development of an organism.
Answer to Problem 1MC
Correct answer:
The cells specialized to perform absorption have microvilli over their surfaces. These are hair-like structures that increase the surface area of the cells.
Justification for the correct answer:
Option (a) is given that the cells whose main function is absorption have microvilli in or on them. The body organs like intestines and kidneys perform the function of absorption. Thus, the cells of these organs should have large surface area. This is accomplished by the presence of microvilli (hair-like structures) that extend outward from the plasma membrane.
These provide a brush lining and increase the area of absorption of various nutrients. They also perform the secretory function of some factors. Microvilli are generally present in the small intestine, surface of egg cells, and white blood cells. Hence, option (a) is correct.
Explanation of Solution
Explanation for incorrect answers:
Option (b) is given that the cells whose main function is absorption have cilia in or on them. The cilia are specialized structures on the surface of the cells and provide motility to the cell, in case of prokaryotes. In case of eukaryotes, they perform the function of moving the contents of the organs further. So, it is a wrong answer.
Option (c) is given that the cells whose main function is absorption have gap junctions in or on them. Gap junctions mainly function to pass the ions and molecules freely through the cells. They help in establishing an electrical communication between the cells. So, it is a wrong answer.
Option (d) is given that the cells whose main function is absorption have secretory vesicles in or on them. The secretory vesicles mediate the vesicular transport of cargo between different cells, like hormones or neurotransmitters. So, it is a wrong answer.
Hence, options (b), (c), and (d) are incorrect.
The cells that are specialized to perform the function of absorption are lined by microvilli.
Want to see more full solutions like this?
Chapter 3 Solutions
EBK ESSENTIALS OF HUMAN ANATOMY & PHYSI
- a. What percentage of a drug is eliminated after 4 half-lives? Please round to the nearest percent. b. What will happen to elimination of the drug in the previous question if the system is saturated? explain and show any math involvedarrow_forwardIf you wanted to reduce the difference between peak and trough levels that occur with repeated administration of a drug, how would you adjust the dose and dose interval without changing the plateau concentration (plateau is the average of peak and trough levels)? Select your answers for both dose and interval. Hint: It may be helpful to think about this problem using an example such as food. How would you eat if you wanted to maintain very steady hunger/satiety levels without changing your total caloric intake? Options: A. Dose; Increase dose B. Dose; Decrease dose C. Dose; Do not change dose D. Interval; Increase the interval between doses (give the drug less frequently) E. Interval; Decrease the interval between doses (give the drug more frequently) F. Interval; Do not change the intervalarrow_forwardWhat percentage of a drug is eliminated after 4 half-lives? Please round to the nearest percent. Show the matharrow_forward
- Briefly explain the 6 domain of interprofessional collaboration: Role clarification, Team functioning, Interprofessional communication, Patient/client/family/community-centered care, Interprofessional conflict resolution, Collaborative leadership. Provide a specific negative events that nursing student would observe in a clinical setting for each domain.arrow_forwardwhat is an intermittent water course and what kind of fish habitat it would providearrow_forwardwhy are native freshwater mussels are an important part of great lakes ecosystemarrow_forward
- what morphological features differentiate the lamprey species and other species in the great lakesarrow_forwardThere are a wide range of therapeutic applications available as options for patients. Medical professionals should be aware of these applications so they can make informed recommendations to patients. To gain a better understanding of some therapeutic applications and how they are related to RNA and mRNA, research long non-coding RNA. Respond to the following in a minimum of 175 words: What is lncRNA and what does it do? How does IncRNA differ from mRNA? What are some therapeutic applications associated with lncRNA? Think about possible future uses of this application. What are the advantages and disadvantages of this application and its continued use?arrow_forwardfour fish or mussel species that are native to the great lakesarrow_forward
- There are a wide range of therapeutic applications available as options for patients. Medical professionals should be aware of these applications so they can make informed recommendations to patients. To gain a better understanding of some therapeutic applications and how they are related to RNA and mRNA, research long non-coding RNA. Respond to the following in a minimum of 175 words: What is lncRNA and what does it do? How does IncRNA differ from mRNA? What are some therapeutic applications associated with lncRNA? Think about possible future uses of this application. What are the advantages and disadvantages of this application and its continued use?arrow_forwardfour physial characteristics of a fish or a mussel that would help you identify it to a speciesarrow_forwarddescribe what you would do in this situation, you are working ona. river and it will take 20 minutes by boat to get back to the field truck, you are 1 hour from finishing the field work on the last day of field trip. you hear thunder int he dsitnace, what did you do?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 LearningBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStax