Which of the following is not an example of reflex action?

Dilating of pupil when light falls on it
Coughing when some irritant enters the nasal cavity
Blinking of eyes
Sudden jerky withdrawal of hand or leg when pricked by a pin.
Blinking of eyes  Blinking of eyes is not a reflex action, but it is involuntaryaction. Areflex action is one which occurs spontaneously whereas involuntary action happens without the conscious choice of an organism. The way the iris in our eye adjusts the size of the pupil in response to sudden bright or dim light is a reflex action. But blinking of eyes is an involuntary action.

Related posts

Considering 10 hours after intake of food, the blood glucose level (per 100 ml) for a diabetic patient is
A. 70 to 99 mg
B. 100 to 125 mg
C. 126 mg and above
D. 50 to 70 mg
The less production of thyroxin hormone leads to the disorder known as
A. parathyroidism
B. hypothyroidism
C. hyperthyroidism
D. goitre
In the male, the testosterone hormone is secreted by
A. pancreas
B. kidneys
C. ovaries
D. testes
The white matter of the spinal cord is made of
A. myelinated dendrite
B. non myelinated dendrite
C. myelinated axon
D. non myelinated axon
Gigantism is due to overproduction of
A. thyroxine
B. parathyroid
C. somatotrophin
D. insulin
The oval window is responsible for the separation of
A. incus and stapes
B. external and middle ear
C. middle and inner ear
D. external ear and ear drum
Abnormal and excessive discharge of nerve impulses in the brain is called
A. paralysis
B. epilepsy
C. stroke
D. nervous disorder

Leave a Reply

Your email address will not be published. Required fields are marked *