
Concept explainers
More than one choice may apply.
Which of the following would you expect to find associated with cells producing hormones or neu-rotransmitters?
a. Cilia c. Gap junctions
b. Secretory vesicles d. Microvilli

Introduction:
Cells are the smallest structural and the 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 that are specialized to produce neurotransmitter, as well as hormones, have secretory vesicles.
Explanation of Solution
Justification for the correct answer:
Option (b) is given that secretory vesicles are associated with cells that produce neurotransmitters and hormones. The secretory vesicles perform the function of excretion from the cells. The hormones and neurotransmitters are excreted into the bloodstream from the cells through secretory vesicles. Hence, option (b) is correct.
Explanation for the incorrect answers:
Option (a) is given that cilia are associated with cells that produce neurotransmitters and hormones. The cilia are specialized structures on the surface of the cells and provide motility to the cell, in the case of prokaryotes. In the case of eukaryotes, they perform the function of moving the contents of the organs further. So, it is an incorrect option.
Option (c) is given that gap junction are associated with cells that produce neurotransmitters and hormones. Gap junctions mainly function to pass the ions as well as molecules freely through the cells. They help in establishing an electrical communication between the cells. So, it is an incorrect option.
Option (d) is given that microvilli are associated with cells that produce neurotransmitters and hormones. 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 a large surface area. This is accomplished by the presence of structures that extend outward from the plasma membrane.
These structures are called microvilli. These provide a brushy lining. These increase the area of absorption of various nutrients. They also perform the function of secretion of some factors. So, it is an incorrect option.
Hence, options (a), (c), and (d) are incorrect.
Therefore, the cells that are specialized to secrete the chemical messengers like hormones, as well as neurotransmitters, accomplish their function by passing these substances into the blood through secretory vesicles.
Want to see more full solutions like this?
Chapter 3 Solutions
Essentials of Human Anatomy & Physiology Plus MasteringA&P with eText -- Access Card Package (11th Edition)
- 12. Calculate the area of a circle which has a radius of 1200 μm. Give your answer in mm² in scientific notation with the correct number of significant figures.arrow_forwardDescribe the image quality of the B.megaterium at 1000X before adding oil? What does adding oil do to the quality of the image?arrow_forwardWhich of the follwowing cells from this lab do you expect to have a nucleus and why or why not? Ceratium, Bacillus megaterium and Cheek epithelial cells?arrow_forward
- 14. If you determine there to be debris on your ocular lens, explain what is the best way to clean it off without damaging the lens?arrow_forward11. Write a simple formula for converting mm to μm when the number of mm's is known. Use the variable X to represent the number of mm's in your formula.arrow_forward13. When a smear containing cells is dried, the cells shrink due to the loss of water. What technique could you use to visualize and measure living cells without heat-fixing them? Hint: you did this technique in part I.arrow_forward
- 10. Write a simple formula for converting μm to mm when the number of μm's are known. Use the variable X to represent the number of um's in your formula.arrow_forward8. How many μm² is in one cm²; express the result in scientific notation. Show your calculations. 1 cm = 10 mm; 1 mm = 1000 μmarrow_forwardFind the dental formula and enter it in the following format: I3/3 C1/1 P4/4 M2/3 = 42 (this is not the correct number, just the correct format) Please be aware: the upper jaw is intact (all teeth are present). The bottom jaw/mandible is not intact. The front teeth should include 6 total rectangular teeth (3 on each side) and 2 total large triangular teeth (1 on each side).arrow_forward
- Answer iarrow_forwardAnswerarrow_forwardcalculate the questions showing the solution including variables,unit and equations all the questiosn below using the data a) B1, b) B2, c) hybrid rate constant (1) d) hybrid rate constant (2) e) t1/2,dist f) t1/2,elim g) k10 h) k12 i) k21 j) initial concentration (C0) k) central compartment volume (V1) l) steady-state volume (Vss) m) clearance (CL) AUC (0→10 min) using trapezoidal rule n) AUC (20→30 min) using trapezoidal rule o) AUCtail (AUC360→∞) p) total AUC (using short cut method) q) volume from AUC (VAUC)arrow_forward
- Human Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage LearningHuman Biology (MindTap Course List)BiologyISBN:9781305112100Author:Cecie Starr, Beverly McMillanPublisher:Cengage LearningConcepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College
- Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage LearningHuman Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning




