In the Following Schematic Drawing, a Growing Axon (In Red)

question 17

Short Answer

In the following schematic drawing, a growing axon (in red) is extended to a target neuron to form three synapses. In its journey, it is guided by a variety of mechanisms. Sort the following mechanisms to reflect the order in which they guide the navigation of the growth cone toward the target neuron in this example. Ignore the final chemoattraction step toward the target neuron itself. Your answer would be a six-letter string composed of letters A to F only, e.g. FACBDE.

(A) Chemoattraction
(B) Chemorepulsion
(C) Cell surface adhesion
(D) Contact inhibition
(E) Extracellular matrix adhesion
(F) Guidance by pioneer neuron

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Definitions:

General Adaptation Syndrome (GAS)

Selye’s hypothetical three-stage response to stress.

Stressors

External or internal stimuli that cause stress, which can lead to physical, mental, or emotional strain or tension.

Approach-Avoidance Conflict

A psychological conflict that occurs when a goal is both appealing and deterring at the same time.

Immune System

The system of the body that recognizes and destroys foreign agents (antigens) that invade the body.