RRB Group D - Human body systems and control coordination Online Test (MCQ Quiz)

1. Which part of the human brain is primarily responsible for voluntary movements and coordination?

A) Cerebrum B) Cerebellum C) Medulla Oblongata D) Hypothalamus

2. The nervous system's basic structural and functional unit is called:

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

3. Which hormone is responsible for regulating blood sugar levels?

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

4. The central nervous system consists of:

A) Brain and spinal cord B) Brain and all nerves C) Spinal cord and all nerves D) Cranial nerves and spinal nerves

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

A) Rapid communication via electrical signals B) Slower communication via chemical signals (hormones) C) Mechanical digestion of food D) Oxygen transport to tissues

6. Which gland produces growth hormone?

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

7. The 'fight or flight' response is primarily triggered by which hormone?

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

8. The reflex arc involves:

A) Brain, spinal cord, and effector B) Sensory neuron, motor neuron, and interneuron C) Receptor, sensory neuron, spinal cord, motor neuron, and effector D) Sensory organ, brain, and muscle

9. Which part of the neuron transmits the nerve impulse away from the cell body?

A) Dendrite B) Cell body (Soma) C) Axon D) Synapse

10. The junction between two neurons is called a:

A) Node of Ranvier B) Axon terminal C) Myelin sheath D) Synapse

11. Which endocrine gland is located in the neck and produces thyroxine?

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

12. The hormone that stimulates the uterus to contract during childbirth is:

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

13. Which part of the brain controls basic life functions like breathing and heart rate?

A) Cerebrum B) Cerebellum C) Medulla Oblongata D) Thalamus

14. The peripheral nervous system includes:

A) Brain and spinal cord B) Cranial nerves and spinal nerves C) Only sensory nerves D) Only motor nerves

15. Which of the following is a type of neurotransmitter?

A) Glucose B) Acetylcholine C) Sodium ion D) Water

16. The adrenal glands produce hormones that regulate:

A) Growth and metabolism B) Blood sugar and stress response C) Reproduction and secondary sexual characteristics D) Water balance and blood pressure

17. Which system is responsible for coordinating and controlling all activities of the body?

A) Skeletal system B) Circulatory system C) Nervous and endocrine systems D) Digestive system

18. The process by which a neuron transmits an electrical signal along its axon is called:

A) Synaptic transmission B) Action potential C) Refractory period D) Depolarization

19. Which hormone is produced by the pancreas and lowers blood glucose levels?

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

20. The 'master gland' that controls many other endocrine glands is the:

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

21. Which part of the eye is responsible for converting light into electrical signals?

A) Cornea B) Lens C) Retina D) Iris

22. The hormone that increases heart rate and blood pressure is:

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

23. The 'control center' of the cell, containing genetic material, is the:

A) Mitochondrion B) Ribosome C) Nucleus D) Endoplasmic reticulum

24. Which hormone is essential for the development of male secondary sexual characteristics?

A) Estrogen B) Progesterone C) Testosterone D) Follicle-stimulating hormone (FSH)

25. The chemical messengers of the endocrine system are known as:

A) Enzymes B) Hormones C) Neurotransmitters D) Antibodies

26. Which structure in the ear is responsible for maintaining balance?

A) Cochlea B) Eardrum C) Ossicles D) Semicircular canals

27. The sympathetic and parasympathetic systems are divisions of the:

A) Central nervous system B) Peripheral nervous system C) Autonomic nervous system D) Somatic nervous system

28. Which hormone is produced by the pineal gland and regulates sleep-wake cycles?

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

29. The myelin sheath around an axon acts as an electrical insulator, speeding up nerve impulse transmission through a process called:

A) Depolarization B) Repolarization C) Saltatory conduction D) Synaptic delay

30. Which gland produces glucagon, a hormone that raises blood glucose levels?

A) Liver B) Spleen C) Pancreas D) Adrenal gland

31. The part of the brain responsible for processing sensory information, relaying it to the cerebral cortex, is the:

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

32. Which of the following is NOT a function of the nervous system?

A) Receiving stimuli B) Processing information C) Producing hormones D) Transmitting signals

33. The hormone that promotes the reabsorption of water in the kidneys is:

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

34. The 'fight or flight' response is mediated by the:

A) Parasympathetic nervous system B) Somatic nervous system C) Sympathetic nervous system D) Enteric nervous system

35. Which hormone is responsible for regulating calcium levels in the blood?

A) Thyroxine B) Insulin C) Parathyroid hormone (PTH) D) Glucagon

36. The chemical released at a synapse that transmits a signal from one neuron to another is called a:

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

37. The structure that connects the brain to the spinal cord is the:

A) Cerebellum B) Pons C) Medulla oblongata D) Cerebral cortex

38. Which part of the neuron contains the nucleus and most of the organelles?

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

39. The hormone that stimulates the production of milk in the mammary glands is:

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

40. Which system primarily uses chemical signals for long-term regulation of body functions?

A) Nervous system B) Endocrine system C) Circulatory system D) Excretory system

41. The auditory receptors are located in the:

A) Cornea B) Retina C) Cochlea D) Tongue

42. Which hormone is involved in regulating the body's metabolism and energy production?

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

43. The process of generating a new nerve impulse after a brief refractory period is called:

A) Repolarization B) Depolarization C) Resting potential D) Action potential propagation

44. The structure that transmits nerve impulses from the ear to the brain is the:

A) Auditory nerve B) Optic nerve C) Vagus nerve D) Olfactory nerve

45. Which gland produces adrenaline and cortisol?

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

46. The ability of the body to maintain a stable internal environment is called:

A) Homeostasis B) Metabolism C) Respiration D) Digestion

47. Which hormone is responsible for the development of female secondary sexual characteristics?

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

48. The 'rest and digest' activities of the body are primarily controlled by the:

A) Sympathetic nervous system B) Somatic nervous system C) Parasympathetic nervous system D) Central nervous system

49. The junction where a motor neuron communicates with a muscle fiber is called a:

A) Neuromuscular junction B) Synapse C) Ganglion D) Plexus

50. Which part of the neuron receives signals from other neurons?

A) Axon B) Cell body C) Dendrite D) Axon terminal

Human body systems and control coordination - Online Test

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