G5 Level 8 : Nervous System

What are the main parts of the nervous system?

• Cerebral cortex and spinal cord

• Autonomic nervous system (ANS) and somatic nervous system (SNS)

• Central nervous system (CNS) and peripheral nervous system (PNS)

• Brainstem and cranial nerves

What is the function of the brain in the nervous system?

• The brain processes information and coordinates the activities of the nervous system.

• The brain only controls voluntary movements.

• The brain stores all memories permanently.

• The brain is responsible for digestion and metabolism.

How does the nervous system communicate within the body?

• The nervous system relies solely on hormones for communication.

• The nervous system communicates through sound waves.

• The nervous system uses light signals to transmit information.

• The nervous system communicates through electrical impulses and chemical signals between neurons.

What do nerves resemble in their function?

• Air traffic control

• Electrical wires

• Plumbing systems

• Road networks

What is the approximate weight of the human brain?

• Approximately 2.5 kilograms (5.5 pounds)

• Approximately 800 grams (1.8 pounds)

• Approximately 1.0 kilograms (2.2 pounds)

• Approximately 1.3 kilograms (3 pounds)

How many nerves are estimated to be in the brain?

• About 50 million neurons

• Roughly 100 billion neurons

• Approximately 10 billion neurons

• Approximately 86 billion neurons

What protects the brain from injury?

• The spine

• The heart

• The lungs

• The skull, meninges, and cerebrospinal fluid

What role do sense organs play in the nervous system?

• Sense organs play a crucial role in detecting environmental stimuli and transmitting information to the nervous system for processing.

• Sense organs only serve to protect the body from harm.

• Sense organs primarily store memories for the brain.

• Sense organs are responsible for controlling muscle movements.

How does the brain respond to changes in the environment?

• The brain only reacts to changes after a delay.

• The brain functions independently of sensory information.

• The brain ignores environmental changes and remains static.

• The brain responds to changes in the environment by processing sensory information and adapting its functions to ensure appropriate reactions.

What is the function of the spinal cord?

• The spinal cord is responsible for digestion and metabolism.

• The spinal cord produces hormones for the body.

• The spinal cord filters toxins from the blood.

• The spinal cord transmits signals between the brain and the body, and coordinates reflexes and motor control.