Pre Test: Electricity in the Body (The Nervous System )

What are the two main components of the nervous system?

• Muscular and circulatory system

• Brain and spinal cord

• Central and peripheral nervous system

• Skeletal and muscular system

Which part of the nervous system is primarily responsible for reflex actions?

• Central nervous system

• Peripheral nervous system

• Autonomic nervous system

• Sympathetic nervous system

What is the basic functional unit of the nervous system?

• Muscle fiber

• Neuron

• Spinal cord

• Synapse

How do neurons communicate with each other?

• By sending electrical signals through the bloodstream

• By passing electrical impulses across synapses

• By direct physical contact between neurons

• By chemical signals only

What part of the neuron receives incoming signals from other neurons?

• Axon

• Cell body

• Dendrites

• Synapse

What role do electrical impulses play in muscle movement?

• They control voluntary muscle movement.

• They create chemical signals for muscle contraction.

• They allow neurons to release neurotransmitters.

• They trigger reflexes only.

The brain and spinal cord are part of which nervous system?

• Autonomic nervous system

• Central nervous system

• Peripheral nervous system

• Sympathetic nervous system

Which of the following best describes a reflex action?

• A voluntary action controlled by the brain

• A quick automatic response to a stimulus

• A conscious movement involving sensory input

• A delayed reaction involving the spinal cord

Which part of the nervous system sends signals to the muscles for movement?

• Autonomic nervous system

• Somatic nervous system

• Sympathetic nervous system

• Parasympathetic nervous system

What type of signal do neurons use to communicate?

• Electrical impulses

• Chemical signals only

• Pressure waves

• Magnetic fields