Advertisements
Advertisements
Question
Explain the Term: Reflex action
Advertisements
Solution
Reflex action is an action which is nearly instantaneous and not under the control of the will. The impulse passes from the sensory cells of the receptor organ along the dorsal root into the spinal cord. From here two messages pass simultaneously—one to the brain and the other travels out along the ventral root to reach the muscle which immediately responds
APPEARS IN
RELATED QUESTIONS
Multiple choice question. Tick (✓) the correct choice:
Nervous system in humans consists of
- brain and nerves
- brain and spinal cord
- brain, spinal cord and nerves
- none of the above
Compare the nervous system and the endocrine system.
Name the following:
Thoracolumber region of spinal cord form.
Answer the following question:
What is a reflex action? Explain it with two examples.
Plants do not have any nervous system but yet, if we touch a sensitive plant, some observable changes take place in its leaves. Explain how could this plant respond to the external stimuli and how it is communicated.
Explain the Term: Cyton
The below diagram is the surface of the tongue showing the taste zone.

(i) Label the parts 1-4.
(ii) Where are the receptors for sensations of taste are located?
(iii) Why do people suffering from cold often complain that they cannot taste their food?
Long answer question
Explain the Reflex Pathway with the help of a neat labelled diagram.
Identify the match that pairs the nerve correctly with its type.
Eight pairs of spinal nerves originate from ______ part of vertebral column.
