Question

Name the specific subdivisions of the autonomic nervous system concerned with
the following:
(i) Slowing down heart beat .........................................................................
(ii) Increasing salivary secretion.....................................................................
(iii) Dilatation of the pupil ..............................................................................
(iv) Increasing intestinal peristalsis .................................................................
(v) Muscle contraction of the urinary bladder giving the feeling the need for
urination. ................................................................................................

Answer 1

Answer:

epinephrine and non epinephrine

Answer 2

(i) Slowing down heartbeat – Parasympathetic nervous system (PNS)  

(ii) Increasing salivary secretion – Superior Cervical Ganglion  

(iii) Dilation of the pupil – Sympathetic branch of Autonomous Nervous System  

(iv) Increasing intestinal peristalsis – Intrinsic intestinal nervous system  

(v) Muscle contraction of the urinary bladder giving the feeling the need for urination – Neurones in the sacral spinal cord in parasympathetic ganglia  

Explanation:  

• A very specifically designed and complex structure exists in humans that is responsible for the entire range of bodily functions that take place, and this structure is known as the autonomic nervous system.
• It is a system of control that enables conscious as well as unconscious regulation of the body functions.
• Examples include Digestion, urination, heart rate, respiratory rate, etc.

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