Understanding the Nervous System

Why do multicellular organisms like humans need a communication system?

• To increase their size

• To reduce energy consumption

• To produce more cells

• To coordinate behavior and respond to surroundings

What is the primary function of a neuron?

• To store energy

• To carry electrical impulses

• To produce hormones

• To digest food

What is the role of a synapse in the nervous system?

• To store information

• To connect muscles

• To transfer electrical impulses between neurons

• To produce energy

Which part of the nervous system is responsible for processing sensory information?

• Peripheral nervous system

• Central nervous system

• Endocrine system

• Digestive system

How does the central nervous system send instructions to the body?

• Through sensory neurons

• Through motor neurons

• Through blood vessels

• Through digestive enzymes

What are effectors in the context of the nervous system?

• Sensory organs

• Blood cells

• Muscles or glands

• Neurons

What is a reflex arc?

• A pathway for conscious thought

• A type of neuron

• A part of the digestive system

• A nerve pathway for unconscious reflexes

Why are reflexes important for survival?

• They help in digestion

• They allow rapid and automatic responses to stimuli

• They improve memory

• They increase brain size

What happens when you touch a hot object?

• The brain processes the information slowly

• A reflex arc causes an immediate withdrawal

• The muscles relax

• The skin becomes thicker

What is the role of relay neurons in a reflex arc?

• To store energy

• To produce hormones

• To digest food

• To connect sensory and motor neurons