Neuro-Endocrine Integration Practice Questions
20 free Neuro-Endocrine Integration practice questions for the NCERT Biology. Tap an option to answer — you get instant feedback, the correct answer, and a detailed explanation for every question.
Which structure serves as the major link between the nervous system and the endocrine system?
- A Thalamus
- B Hypothalamus
- C Pineal gland
- D Cerebellum
Correct answer: Hypothalamus
The hypothalamus receives neural inputs and regulates endocrine activity. It connects the nervous system to the pituitary gland.
The hypothalamus controls the pituitary gland mainly through:
- A Direct neural innervation of pituitary cells
- B Release of trophic hormones from portal blood
- C Releasing and inhibiting hormones
- D Autonomic ganglia relay signals
Correct answer: Releasing and inhibiting hormones
The hypothalamus secretes releasing and inhibiting hormones. These regulate the secretion of hormones from the anterior pituitary.
Which pituitary lobe is directly controlled by neural signals from the hypothalamus?
- A Anterior pituitary
- B Intermediate pituitary
- C Posterior pituitary
- D Pars distalis
Correct answer: Posterior pituitary
The posterior pituitary is directly connected to the hypothalamus by nerve fibers. Hormones are released in response to nerve impulses.
Oxytocin and vasopressin are synthesized in the:
- A Posterior pituitary
- B Anterior pituitary
- C Hypothalamus
- D Pineal gland
Correct answer: Hypothalamus
Oxytocin and vasopressin are synthesized in hypothalamic neurons. They are transported to and released from the posterior pituitary.
Which hormone released by the posterior pituitary regulates water balance in the body?
- A Oxytocin
- B Prolactin
- C Vasopressin
- D Aldosterone
Correct answer: Vasopressin
Vasopressin increases water reabsorption in kidneys. This helps maintain osmotic balance.
The integration of nervous and endocrine responses is best illustrated during:
- A Bone growth
- B Stress response
- C Digestion
- D Blood clotting response
Correct answer: Stress response
Stress responses involve rapid neural signals and slower hormonal actions. Both systems work together to maintain homeostasis.
Which hormone is released during stress due to combined neural and endocrine control?
- A Insulin
- B Thyroxine
- C Adrenaline
- D Parathormone
Correct answer: Adrenaline
Adrenaline secretion is triggered by sympathetic nervous activity. It prepares the body for fight-or-flight response.
The sympathetic nervous system directly stimulates which gland to release adrenaline?
- A Adrenal cortex
- B Adrenal medulla
- C Thyroid gland
- D Pituitary gland
Correct answer: Adrenal medulla
The adrenal medulla receives direct sympathetic innervation. This leads to rapid release of adrenaline.
Which feedback mechanism is commonly used in the integration of endocrine and nervous systems?
- A Positive feedback only
- B Negative feedback
- C Feedforward control
- D Open-loop control
Correct answer: Negative feedback
Negative feedback maintains hormone levels within normal range. It involves signals to both nervous and endocrine centers.
The hormone thyrotropin-releasing hormone (TRH) is secreted by the:
- A Thyroid
- B Anterior pituitary
- C Posterior pituitary
- D Hypothalamus
Correct answer: Hypothalamus
TRH is produced by the hypothalamus. It stimulates the anterior pituitary to release TSH.
Which system ensures faster but short-lived responses?
- A Endocrine system
- B Nervous system
- C Immune system
- D Digestive system
Correct answer: Nervous system
Neural signals travel rapidly through neurons. Their effects are usually short-lived compared to hormones.
Which system ensures slower but long-lasting effects?
- A Nervous system only
- B Endocrine system
- C Muscular system
- D Skeletal system
Correct answer: Endocrine system
Hormones circulate through blood and act slowly. Their effects persist longer than neural signals.
Which hormone shows direct neural control without releasing hormones?
- A Growth hormone
- B ACTH
- C Oxytocin
- D TSH
Correct answer: Oxytocin
Oxytocin release is directly triggered by nerve impulses from the hypothalamus. It does not require releasing hormones.
The hypothalamic-pituitary axis primarily helps in:
- A Coordination of growth, metabolism, and reproduction
- B Regulation of voluntary skeletal muscle movements
- C Coordinating hormonal growth and metabolic balance
- D Maintenance of blood coagulation pathways
Correct answer: Coordinating hormonal growth and metabolic balance
The hypothalamic-pituitary axis regulates growth, metabolism, and reproduction. It integrates neural and endocrine signals.
Which gland is considered the master gland but is itself regulated by the brain?
- A Thyroid gland
- B Adrenal cortex gland
- C Pituitary gland
- D Pineal gland
Correct answer: Pituitary gland
The pituitary gland controls other endocrine glands. Its activity is regulated by the hypothalamus.
Which component of the nervous system mainly interacts with endocrine glands?
- A Somatic nervous system
- B Central nervous system
- C Autonomic nervous system
- D Peripheral sensory system
Correct answer: Autonomic nervous system
The autonomic nervous system regulates glandular secretion. It interacts closely with endocrine glands.
During stress, cortisol release is regulated through which pathway?
- A Hypothalamus-pituitary-adrenal axis
- B Hypothalamus-thyroid axis only
- C Hypothalamus-pancreas axis only
- D Sympathetic-adrenomedullary pathway alone
Correct answer: Hypothalamus-pituitary-adrenal axis
The hypothalamus-pituitary-adrenal axis controls cortisol secretion. It integrates neural signals and hormonal responses.
Which hormone from the anterior pituitary affects adrenal cortex activity?
- A Thyroid-stimulating hormone
- B Adrenocorticotropic hormone
- C Growth hormone
- D Follicle-stimulating hormone
Correct answer: Adrenocorticotropic hormone
ACTH (adrenocorticotropic hormone) stimulates the adrenal cortex. Its secretion is regulated by hypothalamic hormones.
Integration of nervous and endocrine systems helps primarily in:
- A Maintaining homeostasis
- B Increasing body size
- C Producing enzymes
- D Generating immune cells
Correct answer: Maintaining homeostasis
Both systems coordinate to maintain internal balance. This ensures stable physiological conditions.
Which statement best describes the integration of nervous and endocrine systems?
- A They function independently without interaction
- B Neural control replaces hormonal control
- C Hormonal responses always precede neural responses
- D They work together to regulate body functions
Correct answer: They work together to regulate body functions
The nervous and endocrine systems act together to regulate and coordinate body activities. Their integration ensures precise and sustained control.