Introduction into the Nervous System & Nerve Cells

The nervous system is a complex system.

• Complex system

• Simple system

• Endocrine system

• Circulatory system

The nervous system consists of the brain, spinal cord, and nerves.

• Brain, spinal cord, and nerves

• Heart, lungs, and blood vessels

• Muscles and bones

• Skin and hair

The functions of the nervous system include receiving stimuli, processing information, and initiating responses.

• It receives stimuli, processes information, and initiates responses.

• It only transmits signals.

• It is responsible for digestion.

• It is primarily involved in hormone secretion.

The Central Nervous System (CNS) is made up of the brain and spinal cord.

• Brain and spinal cord

• Brain and peripheral nerves

• Spinal cord and peripheral nerves

• Only the brain

The CNS processes information and coordinates bodily responses.

• It processes information and coordinates bodily responses

• It only processes digestive functions

• It only controls voluntary actions

• It regulates blood circulation

The Peripheral Nervous System (PNS) consists of two parts: the Somatic Nervous System, which controls voluntary movements, and the Autonomic Nervous System, which controls involuntary functions.

• Somatic Nervous System (voluntary control) and Autonomic Nervous System (involuntary control)

• Central Nervous System and Peripheral Nervous System

• Sensory Nervous System and Motor Nervous System

• Sympathetic Nervous System and Parasympathetic Nervous System

The function of the Autonomic Nervous System (ANS) is:

• Controlling voluntary muscle movements

• Regulating involuntary functions

• Processing sensory information

• Enhancing cognitive functions

Nerve cells are called ____.

• Neurons

• Axons

• Dendrites

• Synapses

Define dendrites: They are the branched extensions of a neuron that receive information from other neurons.

• They are the branched extensions of a neuron that receive information from other neurons.

• They are long single protrusions that transmit signals away from the cell body.

• They are the protective coverings around the neuron.

• They are the central part of the neuron that processes information.

How many dendrites are in each neuron? Select one of the options below.

• One

• Two

• Several

• None