Station 1 6.5 Neurons and synapses Label the neuron below: What is that neuron part? 1. Picks up message from neighboring neurons 2. Cells that cover axon and make myelin sheath 3. Releases neurotransmitter 4. Elongated nerve fibers that send electrical impulse What type of conduction? 1. Occurs down myelinated nerve fibers, nerve impulse increases speeds and jumps down gaps called nodes of Ranvier Label parts of synapsis
Station 2 6.5 Neurons and synapses The picture above shows two neurons in close proximity to each other 1. Neurotransmitters will be released in area. 2. Area contains the majority of the organelles found within the cell. 3. Area leads away from the cell body. 4. In Area, vesicles containing neurotransmitters are released from one neuron to another. 5. In Area, electrical impulses are converted into chemical molecules. 6. Area leads towards the cell body. Using the picture above, circle either negative or positive for the next 7 statements. 1. Area 1: Resting potential: The internal resting charge of a neuron is negative/positive. 2. Area 2: Action Potential: When the sodium channel opens, sodium (Na+) will diffuse into the cell. The charge of area 2 will become negative/positive. 3. Area 3: Action Potential: When the potassium channel opens, potassium (K+) will diffuse out of the cell. The charge of area 3 will become negative/positive. 4. Area 4: Action Potential: When the sodium channel opens, sodium (Na+) will diffuse into the cell. The charge of area 4 will become negative/positive. 5. Area 5: Action Potential: When the potassium channel opens, potassium (K+) will diffuse out of the cell. The charge of area 5 will become negative/positive. 6. Area 6: Action Potential: When the sodium channel opens, sodium (Na+) will diffuse into the cell. The charge of area 6 will become negative/positive. 7. Area 7: Action Potential: When the potassium channel opens, potassium (K+) will diffuse out of the cell. The charge of area 7 will become negative/positive.
Station 3 6.5 Neurons and synapses Number the steps of an action potential in order from start to finish. The first step has been labeled for you. A. Potassium diffuse out of the neuron B. The Sodium/Potassium pump brings sodium into the neuron and potassium out C. The interior of a neuron becomes positive in charge D. Sodium diffuses into a neuron E. Sodium channels close and Potassium channels open F. The interior of the neuron becomes negative in charge 1 G. Sodium channels open The picture to the right shows Neuron A sending an impulse to Neuron B. 1. If the impulse is traveling from cell A to cell B, cell A would be the: a. Dendrite c. Cell body b. Axon terminal d. Synapse 2. If the impulse is traveling from cell A to cell B, cell B would be the: a. Dendrite c. Cell body b. Axon terminal d. Synapse 3. In which area is an impulse releasing neurotransmitters? 4. Which area shows the vesicles? 5. Which area shows the dendrite receptors? 6. Which area shows the synapse? 7. Which area shows neurotransmitter molecules releasing from vesicles?
Station 4 6.5 Neurons and synapses Using the picture above as an aid answer the following questions: 1. Describe the role of the sodium potassium pump. 2. Describe the role of the sodium channel. 3. Describe the role of the potassium channel. Put the following descriptions in order (1-3) as they would occur. Use the graph above to help you. Reaching the peak voltage causes the sodium ion channels to close and potassium channels to open. Potassium ions can now exit the cell, allowing the cell to return to the testing potential, repolarization. Once the cell is depolarized to a specific point (155mV; the threshold potential), it triggers the rest of the sodium ion channels to open, causing the cell potential to quickly change to a positive value inside the cell. The stimulus opens some ion channels in the cell, allowing the sodium ions to rush back into the cell. The movement of positive ions increases the resting potential from -70mV to -55mV, causing depolarization.
Station 5 6.6 Hormones, Homeostasis, and Reproduction Match that disease! - Diabetes Type I - Diabetes Type II 1. Auto-immune destruction of insulin-secreting cells in pancreas. 2. Decreased responsiveness of body cells to insulin. Use the picture to answer the questions below: 1. What part of the brain is involved in appetite control? 2. What cranial nerve is involved in appetite control? 3. Adipose tissue secretes this chemical when amounts of store fat increases. 4. Secreted by pancreas when blood glucose concentration is high Answer these questions: 5. What does the hormone thyroxin control and where is it produced? 6. What does the hormone Melatonin control and where is it produced? 7. What does the gene SRY control?
Station 6 6.6 Hormones, Homeostasis, and Reproduction Name it!! 1. Spikes at ovulation of the egg. 2. Increases to start egg maturation 3. Its increase causes uttering wall to thicken. 4. Its dropping stimulates menstruation 5. At what day does ovulation usually occur? 6. What gland secretes hormones that control uterine thickening? 7. What gland secretes hormones that control egg maturation?
Station 7 6.6 Hormones, Homeostasis, and Reproduction Label the parts of the reproduction systems: Match that organ: A. Organ that stores sperm until released. B. Organ where egg maturation occurs. C. Organ where sperm maturation occurs. D. Organ where implantation of fertilized egg occurs. E. Organ where fertilization occurs F. Organ(s) that supple sperm with alkaline solution and glucose solution.
Station 8 6.6 Hormones, Homeostasis, and Reproduction 8. What organ is labeled at A? 9. What is this area called that contains the alpha and beta cells? 10. What type of gland is this part? Endocrine or exocrine? 11. What does the exocrine part secrete and where does it go? 12. Where does the endocrine part secrete and where does it go? 13. What hormone is labeled at B? 14. What hormone is labeled at C? 15. What organ stores glycogen in the body? 16. What type of diabetes occurs when body can t produce insulin? (I or II) 17. What type of diabetes occurs when body cells lose ability to respond to insulin? (I or II) 18. What hormone is labeled at A? 19. What part of brain is labeled at B? 20. What type of body cells are at C?