Why Is It That Every Axon in an Adult Mammal

question 21

Multiple Choice

 Why is it that every axon in an adult mammal has a target cell (muscle cell or other neuron) with which it makes synaptic contact?

• A) Each target cell causes the growth of a neuron and its axon.
• B) After formation, axons release a chemical that causes a target cell to form.
• C) Axons that fail to find a target cell die.
• D) An axon will make contact with any kind of cell and adjust its function as necessary.

Identify the genetic basis of sex determination in mammals, including the role of the SRY gene and X chromosome inactivation.

Become familiar with the concepts of master and homeotic genes in development and differentiation.

Understand the practical applications and outcomes of gene inactivation experiments, such as gene knockout studies.

Comprehend the dynamics of gene usage in differentiated cells and the genetic differences between female and male mammals.

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Definitions:

Brain Research

The scientific study of the brain's structure, function, and development.

Subsystems

Components or subsets of a larger system that can function independently but contribute to the system as a whole.

Hawthorne Study

A series of experiments conducted in the 1920s and 1930s that examined how different work conditions affected employee productivity, highlighting the importance of social factors and employee attention.

Motivated

The state of being driven and encouraged to act or engage in certain activities based on either intrinsic or extrinsic factors.