Answer:
(b) Neurotransmitters
are involved in the transmission of impulses at the chemical synapses. They are
present in the synaptic vesicles at axon terminals.
Whereas, hormones
are non-nutrient chemicals which act as intercellular messengers and are
produced in trace amounts.
Cerebrospinal
fluid is present in subarachnoid space. It provides shock resistance to brain
Lymph is a
colourless fluid containing specialised lymphocytes which are responsible for
the immune responses of the body. It is important carrier for nutrients,
hormones, etc. Fats are absorbed through lacteals (lymph vessels) present in
microvilli of intestine.
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