quora
Nobody downloaded yet

Withdrawal reflex and habituation in the garden snail - Essay Example

Comments (0) Cite this document
Summary
Learning represents an important attribute of all living things and it is essential to theire functioning and survival. Learning can be defined as a "process where an organism experiences certain relationships between events and as a consequence the subject's behavior changes because of that experience."…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER97.9% of users find it useful
Withdrawal reflex and habituation in the garden snail
Read TextPreview

Extract of sample
"Withdrawal reflex and habituation in the garden snail"

Download file to see previous pages There is many types of learning, the most basic form of which is non-associative learning. Surprisingly noticed even in primitive life forms, such as the protozoan Stentor coeruleus, it represents a type of learning where the organism becomes aware that some events are unrelated and irrelevant. The most common example of such learning is habituation. According to Thompson and Spencer, it is defined simply as "the gradual waning of an evoked behavioral response with repeated stimulation."3. In essence if an animal first responds to a stimulus that is neither rewarding nor harmful the animal reduces subsequent responses. There are two basic characteristics that separate habituation from the other types of learning. One is that it does not require conscious motivation or awareness to occur, and that it is stimulus specific and that does not cause a cause a general decline in responsiveness.The garden snail (Helix aspersa) is no exception when the process of habituation is concerned. Habituation in the Helix aspersa is well documented and easily observable, particularly in the withdrawal reflex of both the entire body of the garden snail, as well as the eye stalk. When the body or the eye stalk of the garden snail is stimulated, the Helix aspresa instinctively withdraws the entire body towards its shell or the eye stalk towards the body, respectively. This very simple and instinctive action, with the purpose of maintaining the structural integrity of the body of the garden snail, represents the withdrawal reflex in the Helix aspresa. ...
When the garden snail is presented with a novel stimulus, the sensory neurons generate large excitatory postsynaptic potentials in the interneurons and motor cells. These potentials cause the motor cells to discharge strongly, leading to the rapid withdrawal of the body or eye stalk. As the stimulus is repeatedly presented, the synaptic potentials produced by the sensory neurons in the interneurons and in the motor cells become progressively smaller. In time, fewer action potentials are generated in the motor cells, and the behavior is reduced. Finally, the postsynaptic potentials become very small and fail to produce action potentials in the motor neurons, and therefore no behavior is produced. The reduction in the effectiveness of the synaptic connections between the sensory and motor neurons is what maintains the state of habituation that the garden snail has acquired.
- Background
Although the effects of the withdrawal reflex and the subsequent habituation are easily observable, the underlying principles have been scrutinized by the scientific eye. There are many scientific papers that deal with this issue. One of them, written by Steven Prescott and Ronald Chase explains the sites of plasticity in the neural circuit mediating tentacle withdrawal in the garden snail. With their research, they have managed to show that the different parts of the nervous system in the snail mediate different reactions when the withdrawal reflex is concerned. In an another paper, the same others try to explore the matter even further, with analyzing the neural circuit mediating tentacle withdrawal in garden snail, with specific reference to the competence of the ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
  • CHICAGO
(“Withdrawal reflex and habituation in the garden snail Essay”, n.d.)
Retrieved from https://studentshare.org/biology/1528958-withdrawal-reflex-and-habituation-in-the-garden-snail
(Withdrawal Reflex and Habituation in the Garden Snail Essay)
https://studentshare.org/biology/1528958-withdrawal-reflex-and-habituation-in-the-garden-snail.
“Withdrawal Reflex and Habituation in the Garden Snail Essay”, n.d. https://studentshare.org/biology/1528958-withdrawal-reflex-and-habituation-in-the-garden-snail.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document
CHECK THESE SAMPLES - THEY ALSO FIT YOUR TOPIC
Garden suburb consept
Garden suburbs were developed in large numbers between the later half of the nineteenth century and the earlier half of the twentieth century. For example, Bedford Park is a garden suburb that was built in 1875. Likewise, Hampstead is a garden suburb that was built in the first decade of the twentieth century i.e.
2 Pages(500 words)Essay
Withdrawal from Iraq
To study this we must first size up the effect US invasion has had on Iraq. What was meant to be a disarmament campaign for the weapons of mass destruction has turned into a bloodbath. Even in this post Saddam era, these weapons have never been actually found.
2 Pages(500 words)Essay
BANANA GARDEN
Husbands in elite families spent a big part of their lifetime on the road travelling, and that was the reason poems written by most
2 Pages(500 words)Essay
Habituation in sow bugs
These crustaceans preference for moist environment is partly due to the lack of a waxy cuticle to cover their bodies. Thus, they are prone to drying up (Common Wood Louse, 1) . Their activities like feeding and moving around are
2 Pages(500 words)Essay
Habituation in Spirostomum
The level of responsiveness decides its sensitivity towards the stimulus occurrence. Habituation is a reversible decrement of response of the cellular organisms to repeated stimulations. It is seen in both aneural and neural organisms which shows its importance in the animal survival.
4 Pages(1000 words)Essay
Vomiting Reflex
In addition, the vomiting centre receives afferent input from the chemotrigger zone, also known as the area postrema. The Chemotrigger Zone (CTZ) is located at the 4th
1 Pages(250 words)Essay
Operation Market Garden
It incorporated about 21 army groups working under field Marshall Bernard Montgomery and another set under Walter Model. For it to be successful, the operation had to be speedy (Schultz
1 Pages(250 words)Essay
DIY garden marketing plan
These products will be beneficial for anyone who wants to add a little more class to their home gardens. One notable feature of these products is that the main theme of design is always inspired by nature. The company always strives as much as possible
4 Pages(1000 words)Essay
Concepts of job withdrawal
Additionally, the main contributor of job withdrawal and work withdrawal is work dissatisfaction (Krausz & Koslowsky, 2002). According to Krausz and Koslowsky, job withdrawal is often
1 Pages(250 words)Essay
Snail lab report on position of the snail :vetically and horizontal and how tempreture affect the snail
This paper looks at the movement of snail, either vertically or horizontally when placed in the presence of food or water. The paper will also look at the impact of temperature on snail movement. This paper holds that the mucus produced by snails in
5 Pages(1250 words)Essay
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.
Let us find you another Essay on topic Withdrawal reflex and habituation in the garden snail for FREE!
logo footer
Contact us:
+16312120006
Contact Us Now
FREE Mobile Apps:
  • StudentShare App Store
  • StudentShare Google play
  • About StudentShare
  • Testimonials
  • FAQ
  • Blog
  • Free Essays
  • New Essays
  • Essays
  • Miscellaneous
  • The Newest Essay Topics
  • Index samples by all dates
Join us:
Contact Us