Central and Peripheral Nervous System

The Central Nervous System is made up of

• the cerebellum and cerebrum

• the brain and spinal cord

• the brainstem and spinal cord

• cerebrum and spinal cord

How does the body prevent damage to the fragile brain and spinal cord?

• the brain is kept floating in the skull so it can absorb impacts

• the brain and spinal cord are enclosed in bone (skull and spinal column) to protect it

• the spinal cord is kept safe by being hidden behind other body organs and muscles

• The brain isn't as protected as the spinal cord

PNS stands for

• Parallel Nervous System

• Peripheral Nervous System

• Physical Nervous System

• Pressure Nervous System

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The Peripheral Nervous System is made up of

• the brain and spinal cord

• all of the neurons in the body

• the neurons outside of the brain and spinal cord

• the neurons in your arms and legs

What are the two main divisions of the nervous system?

• Central and Peripheral Nervous Systems

• Autonomic and Somatic Nervous Systems

• Sympathetic and Parasympathetic Nervous Systems

• Sensory and Motor Nervous Systems

During a biology class, Olivia asked, "What are the two main divisions of the nervous system?"

• Central and Peripheral Nervous Systems

• Autonomic and Somatic Nervous Systems

• Sympathetic and Parasympathetic Nervous Systems

• Sensory and Motor Nervous Systems

Answer explanation

The two main divisions of the nervous system are the Central Nervous System (CNS), which includes the brain and spinal cord, and the Peripheral Nervous System (PNS), which connects the CNS to the rest of the body.

What does the somatic system do? (the somatic system is part of the Peripheral Nervous System)

• It speeds up functions of the body ready for fight or flight

• it slows down functions of the body ready for rest and digest

• It consists of all the neurons outside of the Central Nervous System

• It is used for actions that you control (reaching out and grabbing something) and sensing stimuli

An impulse is travelling along an axon. It reaches a synapse, what happens next?

• The impulse jumps the gap to the dendrite of the next neuron and continues on its way

• Neurotransmitters are released into the synapse, which bind to the next neuron, generating an impulse in that neuron

• Dopamine is released into the synapse, which binds to the next neuron, generating an impulse in that neuron

• The impulse waits while the next neuron prepares itself to receive the signal

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Select three actions that are carried out by the Parasympathetic System

• slows the heartbeat down

• increases blood flow to the digestive tract to help digest food

• dilates the pupils to improve distance vision

• speeds the heartbeat up

• contracts the pupils to improve close vision

The Autonomic part of the Peripheral Nervous System is split into two parts, select them

• Central Nervous System

• Sympathetic

• Parasypathetic

• Somatic