A person entering an empty room suddenly finds a snake, right in front, on opening the door. Which one of the following is likely to happen in his neurohormonal control system?
1. Sympathetic nervous system is activated, releasing epinephrine and norepinephrine from adrenal medulla
2. Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse
3. Hypothalamus activates the parasympathetic division of brain
4. Sympathetic nervous system is activated, releasing epinephrine and norepinephrine from adrenal cortex
A | B | C | D | |
1. | Muscle spindle | Motor end plate | Afferent pathway | Efferent pathway |
2. | Muscle spindle | Motor end plate | Efferent pathway | Afferent pathway |
3 | Motor end plate | Muscle spindle | Efferent pathway | Afferent pathway |
4. | Motor end plate | Muscle spindle | Afferent pathway | Efferent pathway |