Question

The electrical catalyst for a neural message is called the ______, the chemical messengers of a neural message are called the _____________.

• A. Action potential; ions
• B. Action potential; neurotransmitters
• C. Threshold of excitation; action potential
• D. Neurotransmitters; action potential

You are out jogging and run into a 5 foot mongoose (manakuke) blocking your path. You feel your heart begin to pound, your breathing gets fast, and your hands sweaty. Which part of your nervous system is now active?

• A. parasympathetic
• B. somatic
• C. sympathetic
• D. endocrine

Answer 1

Answers:

1) B. Action potential; neurotransmitters ( Action potential is an electrical impulse it will be activated when sensory information comes in. Neurotransmitters are released by neurons in the body. These are chemical messengers. )

2) C. sympathetic

Autonomic nervous systems will be divided into two parts those are sympathetic and parasympathetic nervous systems. When we are in dangerous situations the sympathetic nervous system will be activated. As a result, heartbeat will be increased and breath will get fast and hands will become sweaty.

In the above-given case, when the person seeing the mongoose his mind conceived it as a threat so that the sympathetic nervous system activated. Hence heart rate increased, breathing became fast and hands became sweaty. That's why sympathetic nervous system is the correct answer.