A. Synapse
B. Junction
C. Connection
D. None of these
# The chemical causing the transmission of nerve impulses across synapses is:
A. Acetylcholine
B. Cholinesterase
C. Choline
D. Acetic acid
# The outermost layer of brain is called:
A. Pericardium
B. Pleura
C. Meninges
D. Omentum
# The efferent process of neurons is known as:
A. Axon
B. Dendrites
C. Cyton
D. Neurofibril
# The chief functional units of the nervous system are:
A. Neuroglia
B. Axon
C. Neurons
D. Dendrites
# Afferent nerve fibers carry impulses from:
A. Central nervous system to muscles
B. Central nervous system to receptors
C. Effector organs to central nervous system
D. Receptors to central nervous system
# The number of spinal nerves in rabbit is:
A. 27 pairs
B. 31 pairs
C. 37 pairs
D. 47 pairs
# The cranial nerve which brings impulses from the internal ear is:
A. Hyomandibular
B. Vagus
C. Auditory
D. Trochlear
# Vagus nerve is:
A. Spinal nerve
B. Sympathetic nerve
C. X cranial nerve
D. Parasympathetic nerve
# The number of spinal nerves in man is:
A. 27 pairs
B. 31 pairs
C. 37 pairs
D. 47 pairs
# Purely motor nerve is:
A. Optic
B. Abducens
C. Ophthalmic
D. Palatinus
# The number of cranial nerves in rabbit/mammals is:
A. 10 pairs
B. 12 pairs
C. 24 pairs
D. 31 pairs
# The longest cranial nerve of the body is:
A. Hypoglossal
B. Vagus
C. Glossopharyngeal
D. Olfactory
# Glands of Swammerdam which are calcareous glands are found:
A. Below the cerebrum in the brain
B. In the liver of the vertebrates
C. At the junction of medulla oblongata and spinal cord
D. At the places of emerging of spinal nerves
# The medullary sheath of the nerve fiber is interrupted at intervals by:
A. Septa
B. Node of Ranvier
C. Synapses
D. Glia
# Longest cell in the body is:
A. Lymph
B. Osteocyte
C. Neuron
D. Chromatophore
# Nerve impulse initiates with the movements of:
A. K+
B. Mg++
C. Ca++
D. Na+
# During transmission of nerve impulse, the potential inside membrane has the following type of charge:
A. First positive, then negative and back positive
B. First negative, then positive and back negative
C. First positive, then negative and remain negative
D. First negative, then positive and remain positive
# Function of sympathetic system is to:
A. Decrease heartbeat
B. Increase heartbeat
C. Contract respiratory organ
D. Secrete saliva
# On stimulation, sympathetic nervous system:
A. Increases sweat secretion
B. Increases tear secretion
C. Decreases saliva
D. All of these
# Metacoel is the cavity in the:
A. Cerebral hemispheres
B. Diencephalon
C. Cerebellum
D. Medulla oblongata
# Foramen of Monro is an aperture between:
A. 2nd and third ventricle
B. Diocoel and metacoel
C. Rhinocoel and diocoel
D. 3rd and 4th ventricle
# Brain is:
A. Ectodermal
B. Mesodermal
C. Endodermal
D. Mesendodermal
# The nervous strip connecting both the cerebral hemispheres in the rabbit is:
A. Corpus callosum
B. Corpus albicans
C. Corpus stratum
D. Corpus spongiosum
# Mammalian brain differs from amphibian brain in possessing:
A. Olfactory lobe
B. Hypothalamus
C. Corpus callosum
D. Cerebellum
# If a person has lost his memory in an accident, the following part of the brain have got injured:
A. Diencephalon
B. Medulla oblongata
C. Cerebellum
D. Cerebrum
# Hearing is related to which part of the human brain:
A. Medulla oblongata
B. Hypothalamus
C. Cerebrum
D. Cerebellum
# The thermoregulatory center is situated in:
A. Spinal cord
B. Pituitary body
C. Cerebellum
D. Hypothalamus
# In homeotherms, the brain center which regulates body temperature is:
A. Cerebellum
B. Cerebral lobes
C. Hypothalamus
D. Medulla oblongata
# Olfactory lobe of rabbit is:
A. Fused and solid
B. Fused and hollow
C. Free and solid
D. Free and hollow
# The iter lies:
A. in the third ventricle
B. in the second ventricle
C. between the third and the fourth ventricles
D. in the lateral ventricles
# Foramen of Monro is:
A. Gap in pelvic girdle of rabbit
B. Foramen in the skull of frog
C. Space in brain of frog and rabbit
D. Pore in the inter-auricular septum in a mammalian heart
# The spinal cord extends from the brain through:
A. Foramen magnum
B. Iter
C. Anterior commissure
D. Foramen of Monro
# Which one of the following is responsible for the control of reflex action?
A. Sensory nerves
B. Motor nerves
C. Sympathetic nervous system
D. Central nervous system
# In reflex action, the reflex arc is formed by:
A. Brain - spinal cord - muscles
B. Receptor - spinal cord - muscles
C. Muscles - receptor - brain
D. Muscles - spinal cord - muscles of spinal nerves
# Which cranial nerve has the highest number of branches?
A. Trigeminal
B. Facial nerve
C. Vagus nerve
D. None of these
# The 3rd, 6th and 11th cranial nerves are:
A. Oculommotor, trigeminal and spinal
B. Optic, facial, and spinal
C. Oculomotor, abducens, spinal
D. Trochlear, abducens, vagus
# Which one is the funtion of parasympathetic nervous system in mammals?
A. Acceleration of heartbeat
B. Constriction of pupil
C. Stimulation of sweat glands
D. Relaxation of urinary bladder
# Sympathetic nerves in mammals arise from:
A. Sacral region
B. Cervical region
C. Thoracolumbar region
D. 3rd, 7th, 9th, and 10th cranial nerves
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