The nervous system

• The nervous system relies on two different organ systems: the nervous system and the endocrine system.
• The nervous system consists of the brain, spinal cord, and all the nerves that connect them.
• The structure of a nerve cell, also known as a neuron, is long, thin, and has many branch connections to either end, enabling it to pass messages onto other nerve cells effectively.
• A reflex arc is a nerve pathway that underlies our unconscious reflexes such as when you instantly move your hand away from a hot pan or blink when something touches your eye.
• The benefit of having reflexes is that they're rapid and automatic, helping us to avoid getting hurt.
• A nerve cell, or neuron, can also be referred to as a nerve fiber.
• A synapse is a connection between the cells, where an electrical impulse hitting the end of a nerve causes the release of some chemicals which diffuse across the gap to the next nerve cell, triggering another electrical impulse.
• The whole nervous system consists of a central nervous system which includes the brain and spinal cord, and a peripheral nervous system which includes all the nerves outside of the central nervous system.
• Sensory neurons carry information from receptors all over our body to the central nervous system, providing information about changes in temperature or the level of carbon dioxide in our bloodstream.
• The central nervous system, or CNS, takes in sensory information, decides what needs to be done about it, and then sends out orders to the rest of the body.
• Motor neurons are another type of nerve cell that carry impulses from the central nervous system to effectors such as muscles or glands, instructing them to contract or release hormones.
• Reflexes are rapid and automatic, helping us to avoid getting hurt.
• The structure of the nervous system is related to its functions.
• The reflex arc is a common concept in the nervous system.
• Reflex actions are important in the nervous system.
• Homeostasis involves automatic control systems and the nervous system is a part of this.
• The nervous system consists of two parts: the Central Nervous System (CNS) which includes the brain and the spinal cord, and other nerves running to and from the central nervous system.
• The PNS consists of all the nerves outside the CNS
• Receptors detect a stimulus and electrical impulses are sent down new loans to the central nervous system.
• The central nervous system acts as the Coordination Center and sends electrical impulses down other neurons to affect us.
• Effectors are usually a muscle which contracts or a gland which secretes a hormone.
• The nervous system enables humans to react to their surroundings and coordinate their behavior.
• The spinal cord connects the brain with nerves that carry impulses between the central nervous system (CNS) and peripheral nervous system (PNS)
• The brain is the control centre of the body, it receives information from sensory receptors and sends messages to effector organs