TRB BT Assistant - Endocrinology and Nervous Coordination Online Test (MCQ Quiz)

1. What is the primary function of the endocrine system?

A) Rapid transmission of nerve impulses B) Secretion of hormones to regulate bodily functions C) Mechanical breakdown of food D) Filtration of blood in the kidneys

2. Which gland is often referred to as the 'master gland' due to its control over other endocrine glands?

A) Thyroid gland B) Adrenal gland C) Pituitary gland D) Pancreas

3. Hormones are chemical messengers produced by which type of glands?

A) Exocrine glands B) Endocrine glands C) Sebaceous glands D) Sweat glands

4. Which hormone is responsible for regulating blood sugar levels by promoting glucose uptake by cells?

A) Glucagon B) Adrenaline C) Insulin D) Thyroxine

5. The 'fight or flight' response is primarily mediated by which hormone secreted by the adrenal medulla?

A) Cortisol B) Aldosterone C) Adrenaline (Epinephrine) D) Estrogen

6. Which gland produces thyroxine, a hormone that regulates metabolism?

A) Parathyroid gland B) Thyroid gland C) Thymus gland D) Pineal gland

7. Which part of the nervous system is responsible for involuntary actions like digestion and heart rate?

A) Central Nervous System (CNS) B) Somatic Nervous System C) Autonomic Nervous System (ANS) D) Peripheral Nervous System (PNS)

8. What is the basic structural and functional unit of the nervous system?

A) Neuron B) Axon C) Dendrite D) Synapse

9. The junction between two neurons where information is transmitted is called a:

A) Synapse B) Ganglion C) Nerve plexus D) Neurotransmitter

10. Which hormone is produced by the pancreas and raises blood glucose levels?

A) Insulin B) Glucagon C) Secretin D) Gastrin

11. The hormone responsible for regulating the sleep-wake cycle is:

A) Serotonin B) Melatonin C) Dopamine D) Norepinephrine

12. Which of the following is a function of the nervous system?

A) Hormone production B) Transport of nutrients C) Coordination of bodily activities D) Waste excretion

13. The central nervous system consists of the:

A) Brain and spinal cord B) Brain and cranial nerves C) Spinal cord and spinal nerves D) Peripheral nerves and ganglia

14. What is the main role of the somatic nervous system?

A) Regulating internal organ functions B) Controlling voluntary muscle movements C) Mediating emotional responses D) Maintaining homeostasis

15. Which hormone stimulates uterine contractions during childbirth?

A) Prolactin B) Oxytocin C) Follicle-stimulating hormone (FSH) D) Luteinizing hormone (LH)

16. The adrenal cortex produces steroid hormones, including:

A) Adrenaline and noradrenaline B) Insulin and glucagon C) Cortisol and aldosterone D) Thyroxine and triiodothyronine

17. Which part of a neuron transmits electrical signals away from the cell body?

A) Dendrite B) Cell body (Soma) C) Axon D) Myelin sheath

18. What is the chemical substance released at a synapse that transmits a nerve impulse?

A) Neurotransmitter B) Hormone C) Enzyme D) Antibody

19. Which endocrine gland is located in the neck, below the larynx?

A) Pituitary gland B) Adrenal gland C) Thyroid gland D) Pancreas

20. Graves' disease, characterized by hyperthyroidism, is caused by an overproduction of which hormone?

A) Parathyroid hormone (PTH) B) Thyroid-stimulating hormone (TSH) C) Thyroxine D) Calcitonin

21. Which part of the brain is primarily responsible for coordination, balance, and posture?

A) Cerebrum B) Cerebellum C) Brainstem D) Hypothalamus

22. The 'action potential' refers to the:

A) Resting state of a neuron B) Electrical impulse that travels along a neuron C) Chemical signal at a synapse D) Hormone binding to its receptor

23. Which hormone is responsible for the development of secondary sexual characteristics in females?

A) Testosterone B) Progesterone C) Estrogen D) Androgen

24. Diabetes mellitus is a condition characterized by high blood glucose levels, often due to insufficient production or utilization of:

A) Glucagon B) Insulin C) Thyroxine D) Growth hormone

25. The 'master control center' for the autonomic nervous system, regulating hunger, thirst, and body temperature, is the:

A) Cerebellum B) Thalamus C) Hypothalamus D) Medulla oblongata

26. Which hormone promotes the reabsorption of water by the kidneys, thus regulating water balance?

A) Aldosterone B) Antidiuretic hormone (ADH) C) Atrial natriuretic peptide (ANP) D) Renin

27. The myelin sheath, which insulates axons and speeds up nerve impulse transmission, is produced by which cells?

A) Neurons B) Astrocytes C) Oligodendrocytes (in CNS) and Schwann cells (in PNS) D) Ependymal cells

28. Which of the following is a neurotransmitter involved in mood regulation, sleep, and appetite?

A) Acetylcholine B) Serotonin C) GABA D) Glutamate

29. Which endocrine gland secretes hormones that regulate calcium and phosphate levels in the blood?

A) Thyroid gland B) Adrenal gland C) Parathyroid glands D) Pancreas

30. Cushing's syndrome is caused by prolonged exposure to high levels of which hormone?

A) Insulin B) Thyroxine C) Cortisol D) Growth hormone

31. The spinal cord's primary role in nervous coordination is:

A) Processing complex thought B) Initiating voluntary movement C) Relaying sensory information to the brain and motor commands to the body D) Regulating heart rate and breathing

32. A reflex arc is a neural pathway that controls a reflex action, typically involving:

A) The cerebral cortex B) A sensory neuron, interneuron (in most cases), and a motor neuron C) Only the brainstem D) A complex series of conscious decisions

33. Which hormone stimulates the production of milk in the mammary glands after childbirth?

A) Oxytocin B) Estrogen C) Prolactin D) Progesterone

34. The 'all-or-none' principle in neurophysiology states that:

A) A neuron will only fire if the stimulus is very strong B) A neuron fires completely or not at all once a threshold is reached C) Neurotransmitters are released in all-or-none amounts D) Hormones only act on specific target cells

35. Which gland produces hormones that influence the development and maturation of T-lymphocytes, crucial for the immune system?

A) Pineal gland B) Thymus gland C) Adrenal gland D) Thyroid gland

36. Acromegaly, a condition of excessive growth in adulthood, is caused by overproduction of:

A) Thyroid hormone B) Insulin C) Growth hormone D) Adrenaline

37. The 'limbic system', involved in emotions and memory, is primarily part of which nervous system component?

A) Cerebellum B) Brainstem C) Cerebrum (specifically cortical and subcortical structures) D) Spinal cord

38. Which hormone is secreted by the pineal gland and regulates circadian rhythms?

A) Serotonin B) Dopamine C) Melatonin D) Cortisol

39. The 'blood-brain barrier' is a protective layer that regulates the passage of substances from the bloodstream into the brain, maintained by specialized cells called:

A) Oligodendrocytes B) Astrocytes C) Microglia D) Ependymal cells

40. Which of the following is a hormone produced by the testes that promotes the development of male secondary sexual characteristics?

A) Estrogen B) Progesterone C) Testosterone D) Luteinizing hormone

41. Hypothyroidism, a condition of low thyroid hormone levels, can lead to:

A) Increased metabolism and weight loss B) Slowed metabolism and weight gain C) Rapid heart rate and anxiety D) Goiter and bulging eyes

42. The 'parasympathetic nervous system' is part of the autonomic nervous system and is often referred to as the 'rest and digest' system, responsible for:

A) Increasing heart rate and alertness B) Conserving energy and promoting digestion C) Initiating the 'fight or flight' response D) Controlling voluntary muscle movements

43. Which hormone is produced by the adrenal medulla and increases heart rate, blood pressure, and glucose levels?

A) Cortisol B) Aldosterone C) Adrenaline (Epinephrine) D) Insulin

44. The structure that connects the two cerebral hemispheres is the:

A) Brainstem B) Cerebellum C) Corpus callosum D) Thalamus

45. Which type of neuron transmits signals from the central nervous system to muscles or glands?

A) Sensory neuron B) Motor neuron C) Interneuron D) Afferent neuron

46. The hormone that stimulates the release of eggs from the ovary and triggers ovulation is:

A) Follicle-stimulating hormone (FSH) B) Luteinizing hormone (LH) C) Prolactin D) Estrogen

47. Which endocrine gland secretes parathyroid hormone (PTH), essential for regulating calcium levels?

A) Thyroid gland B) Adrenal gland C) Parathyroid glands D) Pancreas

48. Parkinson's disease is a neurological disorder characterized by a deficiency in which neurotransmitter?

A) Serotonin B) Dopamine C) Acetylcholine D) GABA

49. The 'pons' and 'medulla oblongata', vital centers for regulating breathing and heart rate, are part of the:

A) Cerebrum B) Cerebellum C) Brainstem D) Spinal cord

50. Which hormone is crucial for growth and development, particularly in children?

A) Thyroxine B) Insulin C) Growth hormone D) Cortisol

Endocrinology and Nervous Coordination - Online Test

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