Question

1. If the musculocutaneous nerve innervating the biceps brachii is a mixed nerve, what does that mean?

   		it carries both sympathetic and parasympathetic fibers
   		it carries signals to both the brain and spinal cord
   		it carries both afferent and efferent signals
   		none of the above

Answer 1

The answer is option C.
The mixed nerve is that which have the efferent and afferent nerve fibres which and thus have the ability to conduct the sensory impulses which is as input and send the motor impulses as output.
Other example is vagus nerve.
All the other options are irrelevant and incorrect.
The nerves are classified into
Afferent - these nerves are those which carry the sensory impulses from the body part towards the CNS.
Efferent - these nerves are those which carry the motor impulses from the CNS to the body part.
Mixed - contain both efferent and afferent nerve fibres.

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