Concept explainers
Which of the following membrane movements is not a passive process?
- osmosis
- diffusion
- active transport
- filtration
Introduction:
Passive transportation is a method in which the movement of the cellular substances takes place from one cell to another. Energy is not required in the transport of molecules.
Answer to Problem 1PL
Correct answer:
The correct answer is option (c) active transport.
Explanation of Solution
Explanation/justification for the correct answer:
Option (c) active transport. Active transportation is the passage of molecules from cell to cell. It requires energy for the process of transport as the movement is initiated against the concentration gradient. So, the correct answer is option (c).
Explanation for incorrect answer:
Option (a) osmosis. Osmosis is a process of movement of water molecules from low concentration to a high concentration. It requires no energy for the process of transport. So, this is an incorrect option.
Option (b) diffusion. Diffusion is a process of movement of molecules, ions, and atoms from high concentration to low concentration. It occurs in the absence of energy. So, this is an incorrect option.
Option (d) filtration. Filtration is a process of movement of solute or fluid against the gradient. The process of filtration occurs by applying the pressure, which can result in the movement of the molecules against the gradient. It does not require energy and filter across the semi-permeable membrane. So, this is an incorrect option.
Want to see more full solutions like this?
Chapter 6 Solutions
Laboratory Manual For Human Anatomy & Physiology
- What are intrinsically disordered proteins, and how might they be useful for a living system?arrow_forwardWhat are Amyloid Fibrils? What biological functions are these known to perform?arrow_forwardHow do histamine and prostaglandins help in the mobilization of leukocytes to an injury site? What are chemotactic factors? How do they affect inflammation process?arrow_forward
- Compare and contrast neutrophils and macrophages. Describe two ways they are different and two ways they are similar.arrow_forwardDescribe the effects of three cytokines (not involved in the initial inflammation response). What cells release them?arrow_forwardDescribe activation of helper T cells or cytotoxic T cellsarrow_forward
- Compare and contrast MHC 1 and MHC 2. Describe two way they are different and two ways they similar including how they are used in antigen presentation.arrow_forwardDescribe two antimicrobial properties of the skin.arrow_forwardDescribe how the inflammation response starts including the sentinel cells and the chemicals involved. How do pathogens trigger the response particularly in the skin?arrow_forward
- How does complement promote the immune response? Describe three waysarrow_forwardWhich of the following is not a possible mechanism for autoimmunity? Select one: A. Abnormal expression of MHC II molecules in non-antigen-presenting cells B. Activation of polyclonal B cells C. Polymorphism of HLA alleles D. Molecular mimicry E. Release of sequestered antigensarrow_forwardWRITTEN WORK 3: NON-MENDELIAN GENETICS Part A: Complete the Punnett square and calculate for the probability of genotype and phenotype. i i Genotype: Phenotype: 08:55arrow_forward
- Human Biology (MindTap Course List)BiologyISBN:9781305112100Author:Cecie Starr, Beverly McMillanPublisher:Cengage LearningBiology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage LearningHuman Physiology: From Cells to Systems (MindTap ...BiologyISBN:9781285866932Author:Lauralee SherwoodPublisher:Cengage Learning
- Concepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College