The Concordance Rate for Mood Disorders Has Been Found to Be

question 143

Multiple Choice

The concordance rate for mood disorders has been found to be about 67% among identical twins and 17% among fraternal twins.These data suggest that the mood disorders

• A) are caused primarily by stress
• B) have an onset at an early age
• C) are due primarily to family environment
• D) are caused in part by genetic factors

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Definitions:

Neuromuscular Junction

The point of contact between a motor neuron and the muscle fiber it controls, crucial for muscle contraction.

Axon Terminal

The endpoint of a neuron's axon where neurotransmitters are released to send signals to other neurons or muscles.

Motor End Plate

A specialized area of muscle cell membrane that interacts with a motor neuron to receive neural signals, facilitating muscle contraction.

Fascicle

A fascicle is a bundle of skeletal muscle fibers surrounded by connective tissue, contributing to the muscle structure.