A Review of The Nervous System

The Nervous System The basic unit of the nervous system is called…

The Nervous System ANSWER Neuron

The Nervous System Label the Parts of a Neuron 4. 3. 2. 5. (gap) 1. (outer layer) 6. 7. (inner tube)

The Nervous System ANSWER Myelin Sheath Nucleus Cell Body Dendrites Synapse Axon Terminal Axon

The Nervous System The nervous system that consists of the brain and spinal cord.

The Nervous System ANSWER Central Nervous System

The Nervous System On your drive to school you just miss being in an accident. As a result, your heart rate sky rockets, you start to sweat and your breathing gets shallow. This is all caused by which nervous system?

The Nervous System ANSWER Sympathetic N.S.

The Nervous System This nervous system takes care of digestion, heart rate and breathing all without you having to think to about it.

The Nervous System ANSWER Autonomic N.S.

The Nervous System Anytime you move a muscle in your body you are using this nervous system.

The Nervous System ANSWER Somatic N.S.

The Nervous System After giving a speech in class you finally get to go to your seat and you feel your breathing slow down, heartbeat slow and you stop sweating. This is a result of which nervous system?

The Nervous System ANSWER Parasympathetic N.S.

The Nervous System The order of neurons that are involved in a reflex.

The Nervous System ANSWER Sensory Neuron-Interneuron-Motor Neuron

The Nervous System The receiving ends of a neuron are called…

The Nervous System ANSWER Dendrites

The Nervous System Area of the neuron that contains the nucleus.

The Nervous System ANSWER Cell Body

The Nervous System The part of a neuron where action potential takes place.

The Nervous System ANSWER Axon

The Nervous System This fatty substance covers the axon and serves as an insulator to speed up action potential. If it degenerates, you have multiple sclerosis

The Nervous System ANSWER Myelin Sheath

The Nervous System The end of a neuron is called.

The Nervous System ANSWER Axon Terminals

The Nervous System A “trigger” in the environment that causes action potential. It can be light or pressure or even a neurotransmitter.

The Nervous System ANSWER Threshold

The Nervous System What is happening when you feel intense pain or pressure?

The Nervous System ANSWER More neurons fire

The Nervous System Put the following steps of action potential in order: A. The axon returns to a negative charge inside with positive on the outside (dominoes set back up) B. A stimulus triggers threshold and positive ions begin to enter the beginning of the axon giving it an electrical charge. C. A chain reaction occurs and the charge travels down the axon (like dominoes falling).

The Nervous System ANSWER B-C-A

The Nervous System The transfer of a message from one neuron to another is called…

The Nervous System ANSWER Synaptic Transmission

The Nervous System Put the following steps of synaptic transmission in order: A. Receptor site opens and allows positive ions to enter the dendrite. B. Neurotransmitters act like a key bonding with the receptor site and unlocking it C. Action Potential reaches the axon terminals D. This triggers the release of neurotransmitters from their vesicles into the synapse

The Nervous System ANSWER C-D-B-A

The Nervous System The gap between two neurons is called?

The Nervous System ANSWER Synapse

The Nervous System Name the Three Ways that Drugs Impact Synaptic Transmission.

The Nervous System ANSWER Drug mimics the neurotransmitter and fits to the receptor sites and triggers more firings of the neuron Drug blocks the receptor site so that neurotransmitters cannot fuse with the receptor site stopping action potential. Drug blocks the reuptake of the neurotransmitter so that it stays in the synapse longer and fuses with the receptor sites more often causing more action potential.

The Nervous System Why does it take longer to have a person squeeze the opposite shoulder of the person in front of them rather than just squeezing the same shoulder?

The Nervous System ANSWER Requires Thinking which takes time.

The Nervous System How does the Nervous System and Endocrine System differ?

The Nervous System ANSWER Nervous System – Fast, uses neurons and action potential to send messages which don’t last long Endocrine System – Slow, uses bloodstream to send hormones that do last a long a time once they arrive.

The Nervous System Name the type of neuron and order in which they occur during a reflex.

The Nervous System ANSWER Sensory Neuron – Interneuron – Motor Neuron