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Nervous and Chemical Coordination in Human Body Solved MCQs

Nervous & Chemical Coordination in Human Body from Biological Perspective


Human Coordination System


1. What is the primary function of the nervous system in the human body?

   a. Transporting oxygen

   b. Coordinating body movements

   c. Digesting food

   d. Regulating body temperature


2. Which of the following is the basic structural unit of the nervous system?

   a. Neuron

   b. Hormone

   c. Red blood cell

   d. Platelet


3. The gap between two neurons where communication occurs is known as:

   a. Synapse

   b. Nephron

   c. Alveoli

   d. Epithelium


4. Which part of the brain is responsible for regulating basic life functions such as breathing and heart rate?

   a. Cerebrum

   b. Cerebellum

   c. Medulla oblongata

   d. Thalamus


5. What is the role of neurotransmitters in the nervous system?

   a. Transporting oxygen

   b. Carrying genetic information

   c. Transmitting signals between neurons

   d. Storing energy


 6. Which gland is often referred to as the "master gland" because it regulates other endocrine glands?

   a. Thyroid gland

   b. Pituitary gland

   c. Adrenal gland

   d. Pancreas


7. Insulin and glucagon are hormones produced by which organ in response to blood sugar levels?

   a. Liver

   b. Pancreas

   c. Kidney

   d. Thyroid


8. The fight-or-flight response is associated with the release of which hormone?

   a. Insulin

   b. Adrenaline

   c. Estrogen

   d. Testosterone


9. Which part of the eye is responsible for detecting light and sending signals to the brain?

   a. Retina

   b. Cornea

   c. Lens

   d. Sclera


 10. What is the main function of the myelin sheath in neurons?

   a. Protecting the neuron

   b. Enhancing signal transmission speed

   c. Synthesizing neurotransmitters

   d. Regulating blood flow


11. What is the primary function of the central nervous system (CNS) in the human body?

   a. Transportation of nutrients  

   b. Coordination and control  

   c. Oxygen exchange  

   d. Immune response  


12. Which of the following is a component of the peripheral nervous system (PNS)?

   a. Brain  

   b. Spinal cord  

c. Nerves outside the brain and spinal cord  

   d. Neurons  


13. What is the role of the autonomic nervous system (ANS) in the body?

   a. Voluntary muscle control  

   b. Digestion and restorative processes  

   c. Memory and learning  

   d. Conscious thought  


14. What is the primary function of neurons in the human body?

   a) Nutrient transport  

   b) Oxygen absorption  

   c) Signal transmission  

   d) Hormone production  


15. Which part of the neuron receives signals from other neurons or sensory receptors?

   a) Axon  

   b) Dendrite  

   c) Synapse  

   d) Myelin sheath  


16. What is the purpose of the myelin sheath in neuron structure?

   a) Signal reception  

b) Insulation and faster signal transmission  

   c) Nutrient storage  

   d) Waste elimination  


17. Which neurotransmitter is commonly associated with pleasure and reward?

   a) Serotonin  

   b) Dopamine  

   c) Acetylcholine  

   d) GABA  


18. What is the gap between two neurons where neurotransmitters transmit signals?

   a) Synapse  

   b) Nucleus  

   c) Myelin junction  

   d) Axon hillock  


19. Which part of the neuron carries the electrical impulse away from the cell body?

   a) Dendrite  

   b) Soma  

   c) Axon  

   d) Synapse  


20. What is the resting membrane potential of a typical neuron?

   a) -70 millivolts  

   b) 0 millivolts  

   c) +30 millivolts  

   d) -30 millivolts  


21. Which division of the nervous system controls involuntary bodily functions like heartbeat and digestion?

   a) Central Nervous System (CNS)  

   b) Peripheral Nervous System (PNS)  

   c) Autonomic Nervous System (ANS)  

   d) Somatic Nervous System (SNS)  


22. What is the role of neurotransmitters in synaptic transmission?

   a) Produce electrical impulses  

   b) Carry genetic information  

   c) Transmit signals between neurons  

   d) Provide structural support  


23. Which disorder is associated with a deficiency of dopamine-producing neurons?

   a) Alzheimer's disease  

   b) Parkinson's disease  

   c) Multiple sclerosis  

   d) Epilepsy  


24. What is a reflex action?

a. Voluntary movement  

b. Involuntary movement  

c. Conscious decision  

d. Unconscious thought  


25. Which of the following is NOT a component of the reflex arc?

a. Sensory neuron  

b. Motor neuron  

c. Interneuron  

d. Voluntary neuron  


26. What is the main purpose of the reflex arc in the human body?

a. Conscious decision-making  

b. Rapid response to stimuli  

c. Long-term memory formation  

d. Muscle development  


27. Where does the integration of sensory and motor information occur in the reflex arc?

a. Sensory neuron  

b. Motor neuron  

c. Synapse  

d. Interneuron  


28. What is the role of the sensory neuron in a reflex arc?

a. Transmitting signals to effectors  

b. Integrating information  

c. Carrying signals from receptors to the spinal cord  

d. Initiating muscle contraction  


29. Which part of the nervous system is responsible for reflex actions?

a. Central Nervous System (CNS)  

b. Peripheral Nervous System (PNS)  

c. Autonomic Nervous System (ANS)  

d. Somatic Nervous System (SNS)  


30. What happens if the reflex arc involves a withdrawal response to a painful stimulus?

a. Muscle contraction  

b. Muscle relaxation  

c. Rapid withdrawal of body part  

d. Increased heart rate  


31. Which of the following best describes a reflex action's speed?

a. Slow and deliberate  

b. Variable  

c. Rapid and automatic  

d. Controlled by consciousness  


32. What type of receptors are responsible for detecting light in the human eye?

a) Mechanoreceptors  

b) Thermoreceptors  

c) Photoreceptors  

d) Chemoreceptors


33. Which part of the human tongue is responsible for detecting sweet taste?

a) Papillae  

b) Fungiform papillae  

c) Circumvallate papillae  

d) Filiform papillae


34. Which receptors in the skin are responsible for detecting pressure and vibration?

a) Nociceptors  

b) Thermoreceptors  

c) Mechanoreceptors  

d) Photoreceptors


35. What type of receptors are found in the nose and are responsible for detecting odors?

a) Gustatory receptors  

b) Olfactory receptors  

c) Thermoreceptors  

d) Photoreceptors


36. Which part of the human ear is responsible for detecting changes in head position and acceleration?

a) Cochlea  

b) Vestibule  

c) Semicircular canals  

d) Tympanic membrane


37. What is the primary function of the endocrine system in the human body?

a) To regulate body temperature  

b) To produce and release hormones  

c) To facilitate digestion  

d) To control muscle movement  


38. Where is the thyroid gland located in the human body?

a) In the chest  

b) Near the kidneys  

c) In the neck  

d) In the abdomen  


39. Which hormone is responsible for regulating blood sugar levels in the body?

a) Insulin  

b) Estrogen  

c) Testosterone  

d) Adrenaline  


40. What is the function of the adrenal glands?

a) Regulate metabolism  

b) Control blood pressure and electrolyte balance  

c) Produce insulin  

d) Stimulate growth  


41. Which hormone is crucial for the development of secondary sexual characteristics in males?

a) Estrogen  

b) Progesterone  

c) Testosterone  

d) Insulin  


42. What is the primary role of the pancreas in the endocrine system?

a) Regulation of metabolism  

b) Production of digestive enzymes  

c) Regulation of blood glucose levels  

d) Control of blood pressure  


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

a) Melatonin  

b) Thyroxine  

c) Cortisol  

d) Epinephrine  


44. What is the function of the parathyroid glands?

a) Regulate calcium levels in the blood  

b) Produce growth hormone  

c) Control body temperature  

d) Stimulate the immune system  


45. Where are the gonads located, and what is their primary function?

a) In the brain, control emotions  

b) In the chest, regulate breathing  

c) In the abdomen, aid digestion  

d) In the reproductive system, produce gametes and hormones  


46. What is the primary function of the endocrine glands in the human body?

   a) Digestion

   b) Coordination and regulation

   c) Oxygen transport

   d) Immune response


47. What hormone is produced by the thyroid gland and is essential for regulating metabolism?

   a) Insulin

   b) Estrogen

   c) Thyroxine

   d) Cortisol


48. Which of the following is not an endocrine gland?

   a) Pancreas

   b) Liver

   c) Adrenal gland

   d) Kidney


49. What hormone is released in response to stress and prepares the body for the "fight or flight" response?

   a) Insulin

   b) Epinephrine (Adrenaline)

   c) Melatonin

   d) Estrogen


50. Which gland plays a crucial role in the sleep-wake cycle by secreting melatonin?

   a) Pineal gland

   b) Thyroid gland

   c) Parathyroid gland

   d) Pituitary gland


51. Insulin is produced by which gland and is important for regulating blood sugar levels?

   a) Pancreas

   b) Thyroid gland

   c) Adrenal gland

   d) Pituitary gland


52. What hormone is responsible for stimulating the development of male secondary sexual characteristics?

   a) Estrogen

   b) Progesterone

   c) Testosterone

   d) Cortisol


53. The adrenal glands are located on top of which organ in the human body?

   a) Liver

   b) Kidneys

   c) Lungs

   d) Heart


54. Which hormone is crucial for the regulation of calcium levels in the blood?

   a) Insulin

   b) Thyroxine

   c) Calcitonin

   d) Cortisol


55. What is the primary cause of paralysis in the human body from a biological perspective?

a) Excessive muscle activity  

b) Impaired nerve function  

c) Lack of blood circulation  

d) Bone fractures


56. Which neurotransmitter deficiency is commonly associated with Parkinson's disease, a form of paralysis?

a) Dopamine  

b) Serotonin  

c) Acetylcholine  

d) GABA


57. What term is used to describe a sudden, uncontrolled electrical disturbance in the brain leading to seizures?

a) Paraplegia  

b) Hemiplegia  

c) Epilepsy  

d) Tetraplegia


58. In epilepsy, what happens during a seizure?

a) Excessive release of dopamine  

b) Abnormal electrical activity in the brain  

c) Reduced blood flow to the brain  

d) Increased production of acetylcholine


59. Which region of the brain is commonly associated with the initiation of epileptic seizures?

a) Cerebellum  

b) Hippocampus  

c) Amygdala  

d) Medulla oblongata


60. What type of epilepsy is characterized by absence seizures, often mistaken for daydreaming?

a) Tonic-clonic epilepsy  

b) Absence epilepsy  

c) Focal epilepsy  

d) Myoclonic epilepsy


61. What is the term for temporary paralysis or weakness on one side of the body typically associated with a stroke?

a) Monoplegia  

b) Hemiplegia  

c) Quadriplegia  

d) Diplegia


62. Which of the following is a potential cause of paralysis resulting from damage to the spinal cord?

a) Decreased neural excitability  

b) Impaired blood circulation  

c) Loss of myelin sheath  

d) Disruption of nerve impulses


63. How do antiepileptic drugs primarily work in managing epilepsy?

a) Increasing dopamine levels  

b) Suppressing abnormal neuronal activity  

c) Enhancing acetylcholine release  

d) Stimulating GABA receptors


64. Which lifestyle factor is often associated with an increased risk of developing epilepsy?

a) Adequate sleep  

b) Regular exercise  

c) Alcohol consumption  

d) Balanced diet


Also Read the Following Suggested Topics for Further Reading

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Location: Sukkur, Sindh, Pakistan

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