1 / 22

Do Now: Page 22

Do Now: Page 22.

kedma
Download Presentation

Do Now: Page 22

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. Do Now: Page 22

  2. Speaking of frogs - this is what a red eyed tree frog looks like with its eyes closed. They actually have three eyelids. The third is called the nictitating membrane, and it allows the frog to protect their eye from danger and to keep it moist while still allowing some visibility.This membrane is found in many different groups of animals, but most of them it simply looks like an opaque membrane. The tree frog's is a bit more striking!

  3. Page 12

  4. Page 19

  5. Homework Review

  6. Homework Review

  7. The Reflex Arc Page 8

  8. The Reflex Arc

  9. Reflex Arc 1. A stimulus

  10. Reflex Arc 2. The stimulus causes a sensory neuron to send a signal to the CNS

  11. Reflex Arc 3. The sensory neuron stimulates an interneuron.

  12. Reflex Arc 4. The interneuron stimulates a motor neuron.

  13. Reflex Arc 5. The motor neuron sends a signal back to the muscle or organ “telling” it what to do.

  14. What is happening here?

  15. The knee jerk reflex is called a monosynaptic reflex because there is only one synapse in the circuit needed to complete the reflex. It only takes about 50 milliseconds between the tap and the start of the leg kick. That is fast! The tap below the knee causes the thigh muscle to stretch. Information is then sent to the spinal cord. After one synapse in the ventral horn of the spinal cord, the information is sent back out to the thigh muscle that then contracts.

  16. Go To Page 15

  17. Do Now: Page 15

  18. Do Now: Page 15 • Homework: Page 908, 1 and 2

More Related