A Membrane Attack Complex Is a Protein Grouping That

question 7

Multiple Choice

A membrane attack complex is a protein grouping that

• A) triggers phagocytosis of a target cell by a nearby macrophage or neutrophil.
• B) forms a channel in the target cell membrane that causes cytolysis.
• C) links a pathogen to a red blood cell so that it is carried to the liver or spleen.
• D) stimulates basophils to attack a multicellular parasite in the body.

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Definitions:

Pericycle

A layer of cells in plant roots that can give rise to lateral roots and is involved in secondary growth.

Endodermis

The innermost layer of cells in the cortex of a plant root, functioning as a selective barrier that regulates the passage of substances from the soil into the vascular system.

Stele

The central part of a root or stem containing the vascular tissue of xylem and phloem, responsible for the transport of water and nutrients.

Cortex

The outer layer of various organs and structures in the body, such as the brain and adrenal glands, or the primary layer of stems and roots in plants.