1 / 39

Exam #3 W 4/2 in class Review T 4/1 from 5-7pm in PAI 3.02

Exam #3 W 4/2 in class Review T 4/1 from 5-7pm in PAI 3.02 Before Exam #3: the nervous system, movement and the immune system. Nerves allow us to perceive the environment while the brain integrates the incoming signals to determine an appropriate response. CB 48.3. Response. CB 48.5.

coty
Télécharger la présentation

Exam #3 W 4/2 in class Review T 4/1 from 5-7pm in PAI 3.02

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Exam #3 W 4/2 in class Review T 4/1 from 5-7pm in PAI 3.02 Before Exam #3: the nervous system, movement and the immune system

  2. Nerves allow us to perceive the environment while the brain integrates the incoming signals to determine an appropriate response. CB 48.3 Response

  3. CB 48.5 Neurons: signals move through neurons electrically and between neurons chemically

  4. At the synapse the electrical signal is converted to a chemical signal at synapse chemical electrical electrical

  5. Neurons are commonly connected to many other neurons, and the effect of the different incoming signals determines what the neuron will do. CB 48.16

  6. Incoming signals move through neurons. Only signals above the threshold are transmitted along the neuron.

  7. Sensory neurons in human skin CB 49.3

  8. Nervous System Signaling Stimulus Integration Transduction Transmission Response

  9. CB 49.15 Smells are detected by receptor neurons in our nose. Each receptor is sensitive to a different chemical

  10. The brain and the central nervous system integrate the various incoming signals CB 48.19

  11. Human Brain Development: Cerebrum- integration and memory Brainstem- homeostasis and input sensory info Cerebellum- motor functions Diencephalon- input to cerebrum and homeostasis CB 48.23

  12. CB 48.26 Cerebrum: higher brain function

  13. CB 48.26 Neocortex: thin layer on outside of the cerebrum. Highly convoluted in humans, ~5mm thick but ~80% brain mass.

  14. CB 48.26 Corpus Callosum: communication between hemispheres

  15. CB 48.27 Different regions of the cerebral cortex integrate different inputs/outputs

  16. Visualizing the specialization of brain regions CB 48.29

  17. Some body parts have more sensory input/ motor control CB 48.28 motor output Sensory input

  18. Nerves allow us to perceive the environment while the brain integrates the incoming signals to determine an appropriate response. CB 48.3 Responses can be release of hormones, change in cell activity, or muscle contraction Response

  19. Muscles allow movement

  20. An earthworm: without something to push against, muscles are not much use. CB 49.25

  21. The skeleton, made of bones, gives support CB 49.26

  22. Bones (connective tissue) are alive

  23. Connections between bones and muscles

  24. Muscles can only contract. Therefore, two muscles are needed for each range of motion. CB 49.27

  25. CB 49.27 2 nerve signals for every movement: excitatory and inhibitory

  26. How do muscles contract?

  27. Excitatory neuro-transmitters released by motor neurons cause muscle cells to contract CB 49.32

  28. CB 49.28 Muscle cells are comprised of series of sarcomeres.

  29. CB 49.28 Each sarcomere is a repeating unit of actin and myosin proteins

  30. CB 49.28 As each sarcomere contracts, the muscle contracts

  31. Neuro-transmitters released at nerve/ muscle junction cause calcium to be released in muscle CB 49.32

  32. CB 49.31 A third protein, tropomyosin controls when the muscle contracts

  33. CB 49.30 ATP provides the energy for myosin movement along the actin

  34. CB 49.32 and .33 The contraction of muscle cells causes the muscle to contract

  35. Nerves allow us to perceive the environment while the brain integrates the incoming signals to determine an appropriate response. CB 48.3 Responses can be release of hormones, change in cell activity, or muscle contraction Response

  36. How do muscles contract? http://health.howstuffworks.com/adam-200006.htm

  37. Einstein’s Brain:http://youtube.com/watch?v=JNOKT-xv7Dw

  38. A video about different human reactions to cool: http://www.pbs.org/saf/1507/video/watchonline.htm

  39. Exam #3 W 4/2 in class Review T 4/1 from 5-7pm in PAI 3.02 Before Exam #3: the nervous system, movement and the immune system

More Related