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BELL WORK : Copy the underlined portion of the question and write your answer.

BELL WORK : Copy the underlined portion of the question and write your answer. Hormones released during puberty lead to increased height in humans. What two body systems interact to cause this increase in height ? Circulatory and reproductive Digestive and muscular Endocrine and skeletal

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BELL WORK : Copy the underlined portion of the question and write your answer.

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  1. BELL WORK: Copy the underlined portion of the question and write your answer. • Hormones released during puberty lead to increased height in humans. What two body systems interact to cause this increase in height? • Circulatory and reproductive • Digestive and muscular • Endocrine and skeletal • Integumentary and nervous

  2. CO: I will describe the interactions between the nervous and endocrine systems.LO: I will complete a scavenger hunt to write my notes. I will do a lab with a partner.

  3. For your notes today… • You will be doing a Scavenger Hunt for your notes. • Use the printed slides around the room to find answers to your questions…they may not be word-for-word! You will need to READ and THINK. • These are your notes for today. If you have a question, ask!

  4. When you finish the scavenger hunt, copy the table below onto the back of your notes page:

  5. Differences • Nervous System • Rapid acting • Electrical Impulses • Involved in control of things that change over short time periods (seconds to minutes) • All or none principle • Examples – • Heart rate • Respiration • Voluntary muscle contractions • Endocrine System • More slowly acting • Chemical Messages • Involved in control of things that change over long time periods (minutes to years) • Gradients • Examples – • Growth • reproduction

  6. Reaction Time Lab • Introduction: A meter stick will be held perpendicular to the floor, dropped, and a student will catch it to determine how far it falls before the student reacts. • The slower the reaction on the part of the student, the farther the meter stick will fall. • Differences in the reaction time of the student to different stimuli will be compared.

  7. Hypothesis Complete the following statement underneath your chart: A (visual/auditory/tactile)stimulus will have the fastest reaction time because ________________________________.

  8. Conclusion: • Was your hypothesis supported? • Why or why not? • What might have caused the results you saw?

  9. BodyResponses Two systems in the body are primarily responsible regulating other body systems • Nervous System • Endocrine System Regulatory systems are needed for the maintenance of homeostasis

  10. The Nervous System Electrical Communication

  11. The Nervous System Main Function: This communication system controls and coordinates functions throughout the body and responds to internal and external stimuli. Our nervous system allows us to feel pain.

  12. The Nervous System Consists of:brain, spinal cord, nerves and sense organs Sense Organs: Eyes, Skin, Ears, Nose & Tongue

  13. The Nerve Anerveis an organ containing a bundle of nerve cells called neurons. Neurons carry electricalmessages called impulsesthroughout the body. Picture shows hundreds of severed neuron axons

  14. dendrite muscle tissue Axon cell body TYPICAL MOTOR NEURON synapse Impulse in a Neuron cell body

  15. 1 2 3 Parts of a Neuron • Cell body: contains nucleus & most of the cytoplasm • Dendrites: projections that bring impulses into the neuron to the cell body. • Axon:long projection that carries impulses away from cell body

  16. Because neurons never touch, chemical signalers called neurotransmittersmust travel through thespace called synapsebetween two neurons. Neurotransmitters (pink spheres) The message is transferred whenRECEPTORSreceive neurotrans-mitters. Synapse (gap)

  17. Communication with Neurons • Nerves work together with muscles for movement. An impulsebegins when one neuron is stimulated by another neuron or by the sense organs. • Theimpulsetravels down the axons of Sensory neuronsto the brain cells called Interneurons. • The brain will then send an impulsethrough motor neuronsto the necessary muscle or organs, telling it to contract.

  18. A reflexis an involuntary response that is processed in thespinal cordnot the brain. Reflexes protect the body before the brain knows what is going on. Reflex Arc

  19. Nervous System Central Nervous System: Consists of: Brain and Spinal Cord Peripheral Nervous System:Sensorydivision and Motor division -includes all sensory neurons, motor neurons, and sense organs

  20. Central Nervous System

  21. The Endocrine System • Main Function: It releases hormones into the blood to signal other cells to behave in certain ways. It is a slow but widespread form of communication. Chemical Communication

  22. The Endocrine System Consists of: Endocrine glandsRelease hormones into the bloodstream. Hormonesare chemicals released in one part of the body that travel through the bloodstream and affect the activities of cells in other parts of the body.

  23. Hormones are Extremely Powerful

  24. Pituitary Gland Function:It secretes nine hormones that directly regulate many body functions and controls functions of other glands. Disorders:To much growth hormones (GH) in early childhood can result in a condition called gigantism. To little GH can result in Pituitary Dwarfism. Robert Wadlow

  25. Thyroid Gland • Function:plays a major role in regulation the body’s metabolism. • Disorders:If the Thyroid Gland produces to much Thyroxin, it can cause a condition known as Hyperthyroidism. If to little thyroxin produces it is called Hypothyroidism.

  26. Pancreas • Function:The Insulin and Glycogen in the Pancreas help to keep the level of glucose in the blood stable. • Disorders:When the Pancreas fails to produce or properly use Insulin, it can cause a condition known as Diabetes Mellitus.

  27. Adrenal Gland • Functions: -The adrenal glands release Adrenaline in the body that helps prepare for and deal with stress. -Also regulates kidney function.

  28. Ovaries • Functions: • Pair of reproductive organs found in women that produce eggs. • Also secreteestrogenand progesterone, which control ovulation and menstruation.

  29. Testes • Functions: • Pair ofreproductive glands that produces sperm. • Also secreteTestosteroneto give the body its masculine characteristics.

  30. Interaction of Glands The hypothalamus is located in the brainand controls the release of hormones from the pituitarygland. It is an important link between the endocrine and nervoussystems.

  31. Think-Pair-Share • What are some differences between the nervous and endocrine systems?

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