Logged out
Access All our Essays in an Instant
Swap your work for FREE access, or pay £4.99 for instant access
The Nervous System
Member rating:
(1 vote)
| Words:
| Submitted: Wed Aug 27 2003
Page Preview
On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:
THE NERVOUS SYSTEM 1. Explain the difference between a motor and sensory nerve/neurone. Sensory neurones receive stimuli from sensory organ and receptors, which transmit the impulse to the spinal cord and the brain. Sensations transmitted by sensory neurone include heat, cold, pain, taste, smell, sight and hearing. Motor neurones conduct impulses away from the central nervous system (the brain and the spinal cord) to muscles and glands in order to stimulate them into carrying out their activities. 2. Describe how a motor impulse moves a muscle. (Include details of an action potential). When a neurone is stimulated maybe by light or sound the permeability of the cell membrane, to sodium ions, changes. Specific sodium gates or channels open and the Na ions rush into the neurone alone concentration and electrochemical gradients. This results in the potential difference across the membrane being reversed the inside becoming positive. This depolarisation lasts for approximately 1 millisecond. 3. Describe...
Get instant access
- Instant, unlimited access to our documents in full
- Swap your work for free access, or pay £4.99
- To see the full version of this document and 146,209 others
Receive email updates for this category
- Simply tell us your email address and receive a weekly Study Help Email for FREE
- Receive 3 FREE essay views with each email
- Get all the latest essays from Coursework.Info & discussion from TheStudentRoom.co.uk
