Question

Norepinephrine (noradrenaline) is known for its role in vigilance. In which part of the nervous system is it predominantly involved?

A) Sympathetic nervous system
B) Parasympathetic nervous system
C) Enteric nervous system
D) Central nervous system

Answer 1

Norepinephrine is predominantly involved in the sympathetic nervous system, which is responsible for the fight-or-flight response. It prepares the body for rapid action by causing physiological changes such as increased heart rate and blood flow to muscles. The ears' sensory receptors detect auditory information, enabling us to hear.

Step-by-step explanation:

Norepinephrine, also known as noradrenaline, is predominantly involved in the sympathetic nervous system.

The sympathetic nervous system is responsible for the fight-or-flight response and is associated with vigilance. When faced with stress or danger, the sympathetic nervous system prepares the body for rapid action. This includes releasing hormones like norepinephrine (noradrenaline) and epinephrine (adrenaline), which cause physiological changes such as increased heart rate, increased blood pressure, and redirection of blood flow to muscles.

The nerves and neurons related by comprising the pathways that carry impulses to and from the central nervous system. Sensory receptors in the ears detect auditory information, such as sound waves, which allow us to hear sounds from the environment.