some examples of reflex actions?

Answer 1

Kicking out when the doctor smashes your kneecap with a sledgehammer, I mean taps your knee with a small hammer. Other examples include pulling your hand away when you touch a hot kettle, and blinking when something comes dangerously close to your face.

Answer 2

Examples Of Reflex Actions

Answer 3

Probably the best-known reflex is the pupillary light reflex. If a light is flashed near one eye, the pupils of both eyes contract. Light is the stimulus, impulses reach the brain via the optic nerve, and the response is conveyed to the pupillary musculature by autonomic nerves that supply the eye.

Another ocular reflex is the lacrimal reflex. When something irritates the conjunctiva or cornea of the eye, nerve impulses pass along the trigeminal nerve and reach the midbrain. The efferent limb of this reflex arc is autonomic and mainly parasympathetic. These nerve fibres stimulate the lacrimal glands of the orbit, causing the outpouring of tears. Other reflexes of the midbrain and medulla oblongata are the cough and sneeze reflexes. The cough reflex is set off by an irritant in the trachea and the sneeze reflex by one in the nose. In both, the reflex response involves many muscles; this includes a temporary diversion of respiration from its usual biochemically ordered function in order to expel the irritant.

The first reflexes develop in the womb. By seven and a half weeks after conception, the first reflex can be observed: stimulation around the mouth of the fetus causes the lips to be turned toward the stimulus. By birth, sucking and swallowing reflexes are ready for use. Touching the baby's lips induces sucking, and touching the back of its throat induces swallowing.

Although the word stereotyped is used in the above definition, this does not mean that the reflex response is invariable and unchangeable. When a stimulus is repeated regularly, two changes occur in the reflex response—sensitization and habituation. Sensitization is an increase in response; in general it occurs during the first 10 to 20 responses. Habituation is a decrease in response; it continues until, eventually, the response is extinguished. When the stimulus is irregularly repeated, habituation does not occur or is minimal.

There are also long-term changes in reflexes, which may be seen in experimental spinal cord transections performed on kittens. Repeated stimulation of the skin below the level of the lesion, such as rubbing the same area for 20 minutes every day, causes a change in latency (the interval between the stimulus and the onset of response) of certain reflexes, with diminution and finally extinction of the response. Although this procedure takes several weeks, it shows that, with daily stimulation, one reflex response can be changed into another. Repeated activation of synapses increases their efficiency, causing some kind of lasting change. When this repeated stimulation is stopped, the reflex responses return to their original form, for there is a regression of synaptic function with disuse

Answer 4

Reflexs Math

Answer 5

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Hand grabbing the slipping dhoti(dress) is the classical example of Reflex Action. A reflex action is involuntary and almost instant movement in response to stimulus. In most contexts, especially involving humans, a reflex action is mediated via the reflex arc (although this is not always true in other animals, or in more casual usage of the term 'reflex'.) Thiruvalluvar under "Friendship" says: உடுக்கை இழந்தவன் கைபோல ஆங்கே இடுக்கண் களைவதாம் நட்பு. 788 As swiftly as the hand moves to seize a slipping garment, Friendship acts to assuage a friend's distress. For a complete discussion of Reflex Action see my source. AJM

Answer 6

Reflex action is nothing but involuntary action which is not under out control.Ex: pumping of heart,sneezing,when we touch a object we suddenly remove our hand which is also a reflex action.

Answer 7

Ask some one to unexpectedly bring a hand as if to hit ur eye, the reflex action shall be to close the eye, and then move the haeda to avoid the hurt.
When we accidently touch any thing hot, we react by moving our body part quickly to a greater magnitude than required.

Answer 8

Reflex actions are actions taken without your information.Most strange example for this is when we see food saliva is produced in mouth this also happens when food enters in our mouth.
Others are coughing when unwanted substance goes into the windpipe,withdrawal of hand from the stimulus.

Answer 9

try this out.. try to touch a small babys feet and they tend to fold their foot.. this is a very common reflex in small babies..

the others try to hit just below the knee cap and if ur repsonses are working right then u tend to extend you left...

Answer 10

1. when our hand accidentally touches a hot object, it is
withdrawn
2.When the underside of our knee is hit with a rubber hammer, it gives a jerk