Which Process Does Not Involve Molecules Moving Across Cell Membranes

question 4

Multiple Choice

Which process does not involve molecules moving across cell membranes?

• A) osmosis
• B) facilitated diffusion
• C) active transport
• D) hydrogenation

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Definitions:

Circulatory System

The circulatory system is an organ system that permits blood and lymph circulation to transport nutrients, oxygen, carbon dioxide, hormones, and blood cells to and from cells in the body.

Mesoderm

The intermediate layer in an embryo during its initial stages of development, responsible for forming the muscular, skeletal, and circulatory systems.

Somites

Blocks of mesoderm that are located on either side of the spine in the developing embryo, which will differentiate into the vertebrae, ribs, muscles, and dermis.

Mesonephros

One of three excretory organs appearing during embryonic development; forms caudal to the pronephros as the pronephros disappears. It is well developed and is functional for a time before the establishment of the metanephros, which gives rise to the kidney. It undergoes regression as an excretory organ, but its duct system is retained in the male as the efferent ductule and epididymis.