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Which one of the following statements is correct ?
A
Neurons regulate endocrine activity, but not vice versa
B
Endocrine glands regulate neural activity, and nervous system regulates endocrine glands
C
Neither hormones control neural activity nor the neurons control endocrine activity
D
Endocrine glands regulate neural activity, but not vice versa
Detailed Solution
The nervous system and the endocrine system jointly coordinate and integrate the activities of the body, and each influences the other.
The nervous system regulates the endocrine glands: the neurosecretory cells of the hypothalamus produce releasing and inhibiting hormones that control the pituitary, and nerve impulses stimulate the adrenal medulla to release adrenaline.
The endocrine glands regulate neural activity: thyroxine is necessary for the normal development and working of the nervous system, adrenaline increases alertness, and sex hormones influence behaviour.
So the control works in both directions.
The statements that describe the control as one-way, or as absent, are wrong.
The correct statement is that endocrine glands regulate neural activity, and the nervous system regulates endocrine glands.
The nervous system regulates the endocrine glands: the neurosecretory cells of the hypothalamus produce releasing and inhibiting hormones that control the pituitary, and nerve impulses stimulate the adrenal medulla to release adrenaline.
The endocrine glands regulate neural activity: thyroxine is necessary for the normal development and working of the nervous system, adrenaline increases alertness, and sex hormones influence behaviour.
So the control works in both directions.
The statements that describe the control as one-way, or as absent, are wrong.
The correct statement is that endocrine glands regulate neural activity, and the nervous system regulates endocrine glands.