Sociologists Bernard Berelson and John Samuel Have Identified Some Important

question 15

Multiple Choice

Sociologists Bernard Berelson and John Samuel have identified some important 'thresholds' associated with declines in fertility.Which of the following is not one of these thresholds?

• A)Less than 50 per cent of the labour force is employed in agriculture.
• B)Life expectancy is at least 60 years.
• C)Eighty per cent of the females between the ages of 15 and 19 are married.
• D)Infant mortality is less than 65 per 1 000 live births.

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Definitions:

Serotonin

A neurotransmitter associated with mood regulation, digestion, sleep, and other important physiological processes.

Epinephrine

A hormone and neurotransmitter also known as adrenaline; it increases heart rate, muscle strength, blood pressure, and sugar metabolism, and is used in medical scenarios to treat severe allergic reactions.

Neural Pathway

A network of neurons connected by synapses along which electrical impulses travel within the nervous system.

Effector Organ

An organ that responds to a stimulus in a reflex arc, typically involving muscles or glands.