Neet Solved Paper 2015 Question 67
Question: A chemical signal that has both endocrine and neural roles is
Options:
A) melatonin
B) calcitonin
C) epinephrine
D) cortisol
Show Answer
Answer:
Correct Answer: C
Solution:
- Epinephrine secreted from the medulla of adrenal gland acts as both, an endocrine hormone and as a neurotransmitter (produced at the ends of sympathetic nerve fibres. Epinephrine as hormone accelerates metabolic rate for preparing us to face emergency situations. As neurotransmitter, it transmits nerve impulse across a synaptic left. Calcitonin is released when $ C{a^{2+}} $ level increases, melatonin causes concentration of pigment in melanocytes and cortisol is a glucocorticoid.
