biology

• Spinal Nerves

  carry motor and sensory signal between the spinal cord and the body
• CNS


  the main processing center of the entire nervous system
• Spinal Cord


  serves as a channel for signals between the brain and the rest of the body
• Effector


  a muscle or organ that makes a response
• Stimulus


  refers to any factor in the environment that influences behaviour
• Nerve Cell / Neuron


  the basic unit of the nervous system
• through sensory neuron


  How does the brain receive information from the receptor
• Nerve Impulse


  an electrochemical signal moving along a neuron
• Thyroxin


  the hormone released by the thyroid gland
• Andrenal


  What particular gland in the endocrine system prepares the body for action in times of emergency?
• Pancreas


  Regulates the level of sugar in the blood
• Hormones


  chemicals secreted by the endocrine glands
• Homeostasis


  refers to the state reached when each part of the body functions in equilibrium with other parts
• Stimulus


  Anything that makes you respond
• Homeostasis


  Maintained by your body's several internal control systems
• Nervous and Endocrine Systems


  The main mechanisms by which homeostasis is sustained in your body
• Neuron


  the basic cellular unit of the nervous system
• Neuron


  transmits impulses to and from the various parts of the nervous system
• Unipolar


  One polar
• Bipolar


  Two polar
• Multipolar


  Three or more polar
• Sensor (Affarent) Neurons

  Receive information and send impulses to the spinal chord or brain
• Sensory (Affarent) Neurons


  transmit impulses from sensory receptors to the CNS
• Motor (Efferent) System


  conduct impulses from the brain or spinal chord to muscles or glands throughout the body
• Motor (Efferent) System


  impulses travels from the CNS to the body
• Interneurons (Association Neurons)


  scattered throughout the brain and spinal chord relay impulses or information from the sensory neurons to the motor neurons
• Interneurons (Association Neurons)


  serve as a connection from the sensory to the motor neuron
• Interneurons (Association Neurons)


  impulse moves between sensory and motor neurons, mostly multipolar
• Synapse


  A space where a message or impulse jumps across to get from one neuron to another
• Nissl bodies


  Body sites of protein synthesis and other important processes
• Nissl bodies


  the granules of rough endoplasmic reticulum in the cytoplasm of neurons
• Axon


  A neuron lacking a nissl body
• Axon


  functions by transmitting impulses to motor neurons
• Axon


  Transmit electrical impulses away from the cell body to other cells
• Myelin Sheath


  surrounds the axon and varies in thickness depending on its corresponding function
• Nerve Fiber


  composed of an axon and its myelin layer
• Nerve Fiber


  outside of the central nervous system, it is surrounded by neurilemma
• Neurilemma


  A very thin transmission line that runs from the berve cells to receptors
• Neurilemma


  composed of living cells that are constantly dividing to produce the myelin layer
• Fiber Tract


  made of bundled nerve fibers that are expanded to certain distances along the spinal cord or the brain