Control and Coordination 2023 with 100% correct questions and answers

stimulus any change inside or outside your body that brings about a response homeostatsis regulation of steady, life-maintaining conditions inside an organism -EX: heartbeat, breathing. temp. control, digestion neurons have a cell body and braches called axons and dendrites dendrites receive messages from other neurons and send them to the cell body axons carry messages away from cell body, branching allows for impulses to travel to many neurons; messages:impulses myelin sheath protective insulation around axon. It's broken at various points so that it looks like a string of sausages. It helps prevent interference between axons. synapse space between axon of one neuron and dendrite of another *STUDY SKETCH OF NEURON* ... sensory neurons receive info and send impulses to brain or spinal cord detect stimuli-skin, ears, eyes, etc. interneurons pick up messages from sensory neurons and relay impulses to motor neurons motor neurons conduct impulses from the brain or spinal cord CNS brain+spinal cord brain organ that coordinates all body activities cerebrum cortex largest part of brain, thinking and memory, the outer layer, called the _______, has many ridges and grooves. This is to increase surface areas allowing for more complex thoughts to be processed. cerebellum coordinates your muscle movements so that you maintain balance and muscle tone brain stem controls involuntary actions such as heart beat, breathing, blood pressure, coughing concussion bruise-like injury to the brain, repeated concussions are linked to permanent brain dysfunction later in life headaches your brain feels no pain, headaches are caused by tight muscles, dialated blood vessels, inflammation migraines mostly vascular strokes caused by a blockage to an artery in the brain seizures caused by an interruption of electrical impulses traveling through the brain, causing abnormal movements causes:epilepsy, low blood sugar, high fever, alchohol/drug abuse spinal cord extension of brain stem, made up of bundles of sensory and motor neurons that relay messages back and forth from brain to other body parts, reflexes controlled here somatic system controls voluntary actions the peripheral nervous system made of all the nerves outside the CNS, nerves connect brain to other parts of the body autonomic system controls involuntary actions drug any substance that can change life processes within the body stimulants caffeine, cocaine, crack speed up CNS activity; ex _____,______,______ depressants alcohol, tranquilizers, pain pills slow down CNS activity; ex. _____, _______,_____ permanent affects of drug use drug dependence, addiction, in adolescences it affects brain development