A Region of the Canary Forebrain Shrinks During the Nonbreeding

question 69

Multiple Choice

A region of the canary forebrain shrinks during the nonbreeding season and enlarges when breeding season begins. This change is probably associated with the annual

• A)addition of new syllables to a canary's song repertoire.
• B)crystallization of subsong into adult songs.
• C)sensitive period in which canary parents imprint on new offspring.
• D)renewal of mating and nest-building behaviours.
• E)elimination of the memorized template for songs sung the previous year.

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Definitions:

Astrocytes

Star-shaped glial cells in the brain and spinal cord involved in physical support, removal of debris, and transport of nutrients to neurons.

Endoplasmic Reticulum

A membrane-bound organelle in eukaryotic cells involved in protein and lipid synthesis, detoxification, and calcium storage.

Lysosomes

Lysosomes are membrane-bound organelles found in animal cells responsible for breaking down waste materials and cellular debris through enzymes.

Proteins

Proteins are large, complex molecules essential for the structure, function, and regulation of the body's tissues and organs, composed of chains of amino acids.