12th class (Fsc) Biology unit 3 MCQs
26. In neurons the message is transmitted across synapse in the form of chemical messenger called:
a. Nerve impulse
b. Neurotransmitters
c. Synaptic vesicle
d. Communication
27. Maximum speed of nerve impulse transmission is:
a. 120 m/s
b. 100m/s
c. 130 m/s
d. 110 m/s
28. In myelinated neurons the impulse jumps from node to node and is called:
a. Synapse
b. Salutatory impulse
c. Synapsis
d. Nerve impulse
29. The neuron net of hydra lacks:
a. Connections
b. Neurons
c. Direction of impulse flow
d. Dendrites
31. Diffused nerve system is found in:
a. Cnidarians
b. Poriferans
c. Annelids
d. Platyhelminthes
32. What is the number of cranial and spinal nerve in man?
a. 12 and 31
b. 24 and 62
c. Both A and B
d. None of these
33. The cytoplasmic process/fibres which carry impulse towards cell body is called:
a. Nissl’s granules
b. Dendron
c. Neurofibrils
d. Axons
34. The part of human limbic system:
a. Cerebrum
b. Amygdala
c. pons
d. Thalamus
35. The structure of human brain that control sleep-wake cycle is:
a. Thalamus
b. Amygdala
c. Hypothalamus
d. Hippocampus
36. Hind brain includes the medulla, pons and:
a. Thalamus
b. Cerebrum
c. Amygdala
d. Cerebellum
37. The largest part of brain is:
a. Cerebrum
b. Cerebellum
c. Thalamus
d. Medulla
38. The human mid brain is:
a. Swollen
b. Reduced
c. Broken
d. Enlarged
39. The cerebrospinal fluid (CSF) is similar in composition to:
a. Blood serum
b. Blood
c. Blood proteins
d. Blood plasma
40. The limbic system is located between thalamus and:
a. Cerebrum
b. Hypothalamus
c. Pons
d. Cerebellum
41. All are related to medulla oblongata except:
a. Heart beat rate
b. Long term memory
c. Blood pressure
d. Breathing rate
42. In human, relay centre is located in:
a. Hind brain
b. Fore brain
c. Spinal cord
d. Mid brain
43. The structure in human brain which control hunger is:
a. Thalamus
b. Amygdala
c. Hypothalamus
d. Hippocampus
44. In human pair of cranial nerves are:
a. 16
b. 12
c. 18
d. 14
45. The number of spinal nerve in man is:
a. 12
b. 24
c. 31
d. 62
46. Alzheimer’s disease is:
a. Renal illness
b. Physical illness
c. Pulmonary illness
d. Mental illness
47. The onset of epilepsy is usually before age of :
a. 30 years
b. 10 years
c. 40 years
d. 20 years
48. Alzheimer’s disease is characterized by the decline in the function of:
a. Kidney
b. Brain
c. Stomach
d. Liver
49. Effective drug available for parkinson’s disease is:
a. AZT
b. Nicotine
c. L-dopa
d. GDNF
50. Mental illness causes:
a. Alzheimer
b. Goiter
c. Scurvy
d. Anaemia