MDCAT XII Biology Nervous Coordination Online Test-2

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Test Details:

Subject: Biology
Class: 2nd year or 12
Chapter Name: Nervous and Cordination
Test: MDCAT 2025
Book: Sindh Textbook
Total No. Of MCQS: 50 MCQS
Time Allowed: 50 Minutes
Price: Free

554

Created on April 17, 2025 By

medicoengineer.com

MDCAT XII Biology Nervous Coordination Online Test-2

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NameEmailPhone Number

1 / 50

1. A nervous system can alter activities in its target cells in muscles and gland because:

a) They are electrically coupled by gap junctions.

b) The target cells have receptor proteins for the signals released by the nervous system.

c) The nervous system releases signals into the blood to control the target cells.

d) The target cells that become disconnected from the nervous system rapidly die.

2 / 50

2. It is involved in long-term memory:

a) Corpus callosum

b) Hippocampus

c) Brainstem

d) Medulla

3 / 50

3. It is the seat of all conscious activities:

a) Cortex

b) Thalamus

c) Spinal cord

d) Midbrain

4 / 50

4. How many meninges cover the human brain?

a) 5

b) 4

c) 3

d) 2

5 / 50

5. The region where impulses move from one neuron to another:

a) Axon

b) Dendrites

c) Synapse

d) Thalamus

6 / 50

6. The major inhibitory neurotransmitter of the brain:

a) Acetylcholine

b) GABA

c) Epinephrine

d) Endorphin

7 / 50

7. An inhibitory postsynaptic potential occurs in a membrane made more permeable to:

a) K⁺ ions

b) Na⁺ ions

c) Ca²⁺ ions

d) ATP

8 / 50

8. Structural disorder in which cells grow abnormally and uncontrollably:

a) Multiple sclerosis

b) Alzheimer’s disease

c) Parkinson’s disease

d) Tumor

9 / 50

9. Inflammation of the brain is called:

a) Stroke

b) Meningitis

c) Encephalitis

d) Tumor

10 / 50

10. Which is/are not vascular disorders of the CNS:

a) Meningitis

b) Stroke

c) Hematoma

d) B and C

11 / 50

11. The skin pressure sensation receptors are called:

a) Meissner’s capsules

b) Ruffini’s corpuscles

c) Merkel’s disks

d) Pacinian corpuscles

12 / 50

12. The parasympathetic nervous system controls:

a) Active digestive tract

b) Fast heart rate

c) Dilated air passages

d) All of the above

13 / 50

13. There are __ pairs of cranial nerves and __ pairs of spinal nerves:

a) 12, 30

b) 31, 12

c) 12, 31

d) 30, 31

14 / 50

14. The pons, located above the medulla, influences:

a) Transitions between sleep and wakefulness

b) Stages of sleep

c) Rate of breathing

d) All of the above

15 / 50

15. It controls autonomic functions such as breathing and swallowing:

a) Medulla

b) Brainstem

c) Thalamus

d) Corpus callosum

16 / 50

16. It plays a role in muscle tone, movement, and reflexes:

a) Limbic system

b) Medulla

c) Reticular formation

d) Cerebellum

17 / 50

17. Response to behavioral stimuli is managed by:

a) Thalamus

b) Amygdala

c) Reticular formation

d) Hypothalamus

18 / 50

18. The hypthalamus is the major coordinating center, controlling:

a) Autonomic nervous system

b) Hunger/thirst/water balance

c) Menstrual cycle

d) All of the above

19 / 50

19. The activities of the cerebral cortex fall into:

a) Sensory area

b) Association area

c) Motor area

d) All of the above

20 / 50

20. _____ is more developed in humans:

a) Cerebellum

b) Medulla

c) Cerebral cortex

d) Hippocampus

21 / 50

21. The first line of defense of the CNS:

a) CSF

b) Meninges

c) Bony armor

d) All of the above

22 / 50

22. Inhibitory neurotransmitters:

a) Glycine

b) GABA

c) Glutamate

d) Dopamine

e) All except dopamine

23 / 50

23. Parkinson's disease is due to:

a) Low level of dopamine

b) Low level of serotonin

c) High level of dopamine

d) High level of serotonin

24 / 50

24. Excitatory neurotransmitters:

a) Acetylcholine

b) Biogenic amines

c) Serotonin

d) All of the above

25 / 50

25. The action potential does not propagate over the entire length of the axon, but jumps from node to node, skipping insulated regions called:

a) Simple conduction

b) Refractory period

c) Saltatory conduction

d) Nerve impulse

26 / 50

26. The refractory period persists only for __ milliseconds:

a) 4

b) 9

c) 2

d) 3

27 / 50

27. Which of the following is/are not correct?

a) Membrane returns to the resting state from 10 to 30 milliseconds

b) The action potential may reach up to +50 mV

c) If the stimulus is not capable of exciting any response, it is called a subthreshold stimulus

d) The action potential is based on the "All or None" law

e) None

28 / 50

28. The sodium-potassium pump per ATP:

a) Brings three Na⁺ inside, removes two K⁺ outside

b) Brings two Na⁺ inside, removes three K⁺ outside

c) Brings two K⁺ inside, removes three Na⁺ outside

d) Brings three K⁺ inside, removes two Na⁺ outside

29 / 50

29. Neurons have more ___ leakage channels:

a) Na⁺

b) Ca²⁺

c) K⁺

d) Cl⁻

30 / 50

30. Depolarization refers to a graded potential state because a threshold stimulus of about __ causes a change in membrane potential:

a) +55 mV

b) -55 mV

c) -70 mV

d) -90 mV

31 / 50

31. The human brain weighs approximately:

a) 1.4 pounds

b) 3 pounds

c) 3 kg

d) A and C

32 / 50

32. Which of the following related to polarization is correct?

a) Na⁺ is 10 times more outside, K⁺ is 30 times more inside

b) K⁺ is 10 times more inside

c) Na⁺ is 30 times more outside

d) Na⁺ is 10 times more inside, K⁺ is 30 times more outside

33 / 50

33. The RMP (Resting Membrane Potential), which is -70, is measured in:

a) Millivolts

b) Microvolts

c) Nanovolts

d) Gigavolts

34 / 50

34. It is the electrochemical transmission of messages through neurons:

a) Membrane potential

b) Nerve impulse

c) Distribution of ions

d) Depolarization

35 / 50

35. The voltage measured across the neurolemma is called:

a) Voltage potential

b) Nerve impulse

c) Membrane potential

d) RMP

36 / 50

36. ___ is/are not polysynaptic:

a) Knee jerk

b) Blinking of eyes

c) Pain withdrawal reflexes

d) B and C

37 / 50

37. Every sensory neuron conveys a signal from the sensory receptor to the motor neuron, which in turn sends signals to the effector. This often results in an automatic response called:

a) Reflex action

b) Reflex

c) Reflex arc

d) A and B

38 / 50

38. A sensory neuron is also called:

a) Efferent

b) Afferent

c) Association

d) rate

39 / 50

39. Functionally, how many types of neurons are there?

a) Four

b) Three

c) Two

d) Seven

40 / 50

40. A non-myelinated part of an axon between two Schwann cells is called:

a) Node of Ranvier

b) Facilitated

c) Neurofibril node

d) A and C

41 / 50

41. Schwann cells (one of two types of neuroglia) produce myelin in the:

a) Central Nervous System

b) Autonomic Nervous System

c) Peripheral Nervous System

d) Somatic Nervous System

42 / 50

42. Neuroglia serve as:

a) Supply nutrients to neurons

b) Immune functions

c) Guide axon migration

d) All

43 / 50

43. Structurally and functionally, neurons are supported by:

a) Supporting cells

b) Neuroglia

c) Glial cells

d) All

44 / 50

44. One of the main functions of the cell body is to manufacture:

a) Neurotransmitters

b) Proteins

c) RER

d) Calcium ions

45 / 50

45. Nissl bodies are groups of:

a) Ribosomes and SER

b) Ribosomes and RER

c) Nucleolus and RER

d) DNA and RER

46 / 50

46. The soma or cell body contains:

a) Nucleus

b) Variety of organelles

c) Nissl bodies

d) All

47 / 50

47. The structural and functional unit of the nervous system is:

a) Neuron

b) Neuroglia

c) Native cell

d) Immune cell

48 / 50

48. The receptor stimulated by pressure, touch, stretch, motion, and sound is:

a) Nociceptor / Pain receptor

b) Chemoreceptor

c) Photoreceptor

d) Mechanoreceptor

49 / 50

49. All receptors are:

a) Signal

b) Endothelial

c) Transducers

d) Olfactory

50 / 50

50. The system of the body that provides communication through electrical and chemical signals is:

a) Nervous

b) Endocrine

c) Respiratory

d) Integumentary

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MDCAT XII Biology Nervous Coordination Online Test-2

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