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Nervous System

Total questions: 103

Worksheet time: 57mins

Name
Class
Date
1.

Neurons are excitable cells because their membranes are in a –

a)

Depolarised state

b)

Polarized state

c)

Repolarized state

d)

None of the above is correct

2.

Ion channels present on neural membrane are –

a)

Impermeable

b)

Semipermeable

c)

Selective permeable

d)

Fully permeable

3.

A polarized neuron is said to be in –

a)

Action potential

b)

Spike potential

c)

Resting potential

d)

None of these

4.

When a neuron is not conducting any impulse i.e. resting, the axonal membrane is –

a)

Comparatively more permeable to K+ and impermeable (nearly impermeable) to Na+

b)

Impermeable to negatively charged proteins present in the axoplasm

c)

Both a and b

d)

More permeable to Na+ ions than K+ ion.

5.

What generally maintains the electrical charge across the neuronal membrane?

a)

Na+ - K+ pump

b)

Action potential

c)

resting potential

d)

Voltage - gated channels

6.

Na+ - K+ pump

I. No needs energy (ATP) to work

II. Expels 3 Na+ for every 2K+ ions imported

III. Works against a concentration gradient

IV. Maintains resting potential

a)

All are correct

b)

Only II and III are correct

c)

Only I and III are correct

d)

Only I is incorrect

7.

During depolarization of the neuronal membrane –

a)

Na+ ions rapidly move to the inside of the cell

b)

Na+ ions rapidly move to the outside of the cell

c)

K+ ions rapidly move to the outside of the cell

d)

K+ ions rapidly move to the outside of the cell

8.

A segment of neuronal membrane showing action potential is said to be –

a)

Polarized

b)

Depolarized

c)

Repolarized

d)

None of the above

9.

The electrical potential difference across the depolarized membrane is called –

a)

Action potential

b)

Resting potential

c)

Water potential

d)

Solute potential

10.

Which of the following diagram illustrates the distribution of Na+ and K+ ions in a section of non-myelinated axon which is at resting potential?

a)
b)
c)
d)
11.

How do parasympathetic neural signals affect the working of the heart ?

a)

Reduce both heart rate and cardiac output.

b)

Heart rate is increased without affecting the cardiac output.

c)

Both heart rate and cardiac output increase.

d)

Heart rate decreases but cardiac output increases.

12.

Which one of the following statements is not correct ?

a)

Retinal is the light absorbing portion of visual photo pigments.

b)

In retina the rods have the photopigment rhodopsin while cones have three different photopigments.

c)

Retinal is a derivative of Vitamin C.

d)

Rhodopsin is the purplish red protein present in rods only.

13.

Which one of the following is not a refractive medium of the eye?

a)

Lens

b)

Vitreous humour

c)

Aqueous humour

d)

Pupil

14.

In mammalian eye, the ‘fovea’ is the center of the visual field, where

a)

Only rods are present

b)

More rods than cones are found

c)

High density of cones occur, but has no rods

d)

The optic nerve leaves the eye

15.

The fovea of eye

a)

has the lowest light threshold

b)

is the region of highest visual activity

c)

contains only green and red cones

d)

contains only rods

16.

Cavity of vitreous humour (gel) is –

a)

Behind the lens

b)

In front of lens

c)

Between choroid and retina

d)

Between choroid and sclera

17.

Cavity of aqueous humour (watery fluid) is –

a)

Behind the lens

b)

Between choroid and retina

c)

Between cornea and lens

d)

Between lens and retina

18.

Which of the following options is wrong?

a)

Eye muscles are attached with sclera

b)

Visual purple is concerned with dim light, while visual violet is concerned with bright light

c)

The colour differentiation is done by cones

d)

None

19.

Which of the following statements is not correct ?

a)

In the knee-jerk reflex, stimulus is the stretching of muscle and response is its contraction

b)

An action potential in an axon does not move backward because the segment behind is in a refractory phase

c)

Depolarisation of axon causes outside negatively and inside positively charged

d)

Rods are very sensitive and contribute to daylight vision

20.

Which of the following systems transmits impulse from CNS to involuntary organs and smooth muscles?

a)

Somatic neural system

b)

Sympathetic neural system

c)

Parasympathetic neural system

d)

Autonomic neural system

21.

Bipolar neuron –

a)

Has two dendrons

b)

Has one dendron and one axon

c)

Is interneuron

d)

Has no dendron

22.

Which of the following system relays impulse from CNS to skeletal muscles?

a)

Somatic neural system

b)

Sympathetic neural system

c)

Parasympathetic neural system

d)

Autonomic neural system

23.

Which of the following cells form myelin sheath around axon –

a)

Neuroglial cell

b)

Neuron

c)

Schwann cell

d)

Astrocyte

24.

When a neuron is not conducting any impulse i.e. resting, the axonal membrane is –

a)

Comparatively more permeable to K+ and impermeable (nearly impermeable) to Na+

b)

Impermeable to negatively charged proteins present in the axoplasm

c)

Both a and b

d)

More permeable to Na+ ions than K+ ion.

25.

What generally maintains the electrical charge across the neuronal membrane?

a)

Na+ - K+ pump

b)

Action potential

c)

resting potential

d)

Voltage - gated channels

26.

The impulses from CNS to skeletal muscles are relayed through

a)

SNS

b)

Somatic neural system

c)

PSNS

d)

All of these

27.

Unidirectional transmission of the nerve impulse is maintained by –

a)

Interneurons

b)

Myelin sheath

c)

Synapse

d)

Membrane polarity

28.

The new potential developed on post-synaptic membrane is –

a)

Always excitatory

b)

Always inhibitory

c)

May be excitatory or inhibitory

d)

Neither excitatory nor inhibitory

29.

Which of the following regions of the brain is incorrectly paired with its function?

a)

Cerebellum – Language comprehension

b)

Medulla oblongata – Homeostatic control

c)

Cerebrum – Calculation and contemplation

d)

Corpus callosum – Communication between the left and right cerebral cortices

30.

I. Cerebellum has very convoluted surface in order to provide the additional space for more neurons

II. The medulla is connected to the spinal cord

III. Medulla contains controlling centres for respiration, cardiovascular reflexes and gastric secretion

a)

All are correct

b)

Only I is correct

c)

Only I and III are correct

d)

Only II is correct

31.

Immediate involuntary response to stimulus is –

a)

Reflex action

b)

Autonomic response

c)

Action control

d)

None of these

32.

Reflex action is controlled by –

a)

CNS

b)

PNS

c)

ANS

d)

None of these

33.

Which of the following structures or regions is incorrectly paired with its functions?

a)

Hypothalamus : production of releasing hormones and regulation of temperature, hunger and thirst.

b)

Limbic system : consists of fibre tracts that interconnect different regions of brain; controls movement.

c)

Medulla oblongata : controls respiration and cardiovascular reflexes.

d)

Corpus callosum : band of fibers connecting left and right cerebral hemispheres.

34.

Five events in the transmission of nerve impulse across the synapse –
A. Opening of specific ion channels allows the entry of ions, a new action potential is generated in the post-synaptic neuron.
B. Neurotransmitter binds to the receptor on post synaptic membrane
C. Synaptic vesicle fuses with pre-synaptic membrane, neurotransmitter releases into synaptic cleft.
D. Depolarization of pre-synaptic membrane
E. Arrival of action potential at axon terminal.
In which sequence do these events occur?

a)

 E→D→C→B→AE\rightarrow D\rightarrow C\rightarrow B\rightarrow A  

b)

 A→B→C→D→EA\rightarrow B\rightarrow C\rightarrow D\rightarrow E  

c)

 A→B→D→C→EA\rightarrow B\rightarrow D\rightarrow C\rightarrow E  

d)

 E→D→C→A→BE\rightarrow D\rightarrow C\rightarrow A\rightarrow B  

35.

The junction between the axon of one neuron and the dendrite of the next is called –

a)

A joint

b)

Constant bridge

c)

Junction point

d)

Synapse

36.

During repolarization of nerve –

a)

K+ gate closes and Na+ gate opens

b)

Na+ channels are closed and K+ channels are opened

c)

Both K+ and Na+ gates are closed

d)

Both gates remain opened

37.

The new potential developed on post-synaptic membrane is –

a)

Always excitatory

b)

Always inhibitory

c)

May be excitatory or inhibitory

d)

Neither excitatory nor inhibitory

38.

The hind brain develops into which structure?

a)

Medulla

b)

Pons

c)

Cerebellum

d)

All

39.

The forebrain develops into –

a)

Diencephalon and Cerebrum

b)

Diencephalon and Cerebellum

c)

Diencephalon and Medulla

d)

Diencephalon and Pons

40.

The thalamus and hypothalamus develop from –

a)

Telencephalon

b)

Diencephalon

c)

Cerebrum

d)

Cerebellum

41.

The correct sequence meninges from inner to outerside is –

a)

 Arachnoid→Duramater→PiamaterArachnoid\rightarrow Duramater\rightarrow Piamater  

b)

 Duramater→Arachnoid→PiamaterDuramater\rightarrow Arachnoid\rightarrow Piamater  

c)

 Piamater→Arachnoid→DuramaterPiamater\rightarrow Arachnoid\rightarrow Duramater  

d)

 Piamater→Duramater→ArachnoidPiamater\rightarrow Duramater\rightarrow Arachnoid  

42.

The name of nervous band connecting the cerebral hemispheres is –

a)

Corpus albicans

b)

Corpus callosum

c)

Corpus striatum

d)

Corpus spongiosum

43.

Myelinated fibres of the tract forms –

a)

White matter

b)

Grey matter

c)

White and grey matter

d)

Red matter

44.

Which excitatory neurotransmitter is involved in the transmission of impulse at the neuro-muscular junction?

a)

Epinephrine

b)

Serotonin

c)

Acetyl choline

d)

Glycine

45.

Acetylcholine is a :

a)

Hormone

b)

Brain peptide

c)

Neurotransmitter

d)

Digestive enzyme

46.

Myelin sheath is produced by :

a)

Astrocytes and Schwann cells

b)

Oligodendrocytes and Osteoclasts

c)

Osteoclasts and Astrocytes

d)

Schwann cells and Oligodendrocytes

47.

Receptor sites for neurotransmitters are present on :

a)

Pre-synaptic membrane

b)

Tips of axons

c)

Post-synaptic membrane

d)

Membrane of synaptic vesicles

48.

If myelin sheath present completely around axon what will be happened?

a)

Conduction will be as usual

b)

Conduction is slow

c)

Conduction is fast

d)

Conduction is stoppped

49.

In nerve resting membrane potential is maintained by :

a)

Active transport

b)

Passive diffusion

c)

Both (a) and (b)

d)

Unidirectional flow of ion

50.

Nissl bodies are mainly composed of

a)

Nucleic acids and SER

b)

DNA and RNA

c)

Proteins and lipids

d)

Free ribosomes and RER

51.

In the above diagram showing axon terminal and synapse A, B, C, D and E respectively represents:

a)

axon terminal, synaptic cleft, synaptic vesicles, neurotransmitters and receptors

b)

axon terminal, synaptic vesicles, synaptic cleft, receptors and neurotransmitters

c)

synaptic cleft, synaptic vesicles, axon terminal, neurotransmitters and receptors

d)

synaptic cleft, axon terminal, synaptic vesicles, neurotransmitters and receptors

52.

The impulses from CNS to skeletal muscles are relayed through

a)

SNS

b)

Somatic neural system

c)

PSNS

d)

All of these

53.

Unidirectional transmission of the nerve impulse is maintained by –

a)

Interneurons

b)

Myelin sheath

c)

Synapse

d)

Membrane polarity

54.

Pituitary dwarfism is caused due to the deficiency of

a)

Oxytocin

b)

Growth hormone

c)

Prolactin

d)

Luteinizing hormone

55.

Which element is required for the synthesis of thyroxine?

a)

Magnesium

b)

Iodine

c)

Calcium

d)

Iron

56.

Thyroxine has an important role in regulating

a)

Blood calcium level

b)

Basal metabolic rate

c)

Water and electrolyte balance

d)

Both (b) and (c)

57.

How many parathyroid glands are present in human beings?

a)

3

b)

4

c)

5

d)

8

58.

Which of the following is a hypercalcemic hormone?

a)

Thyroxine

b)

Parathyroid hormone

c)

Insulin

d)

Glucagon

59.

Which hormone increases blood calcium level ?

a)

Thyroxine

b)

Thyrocalcitonin

c)

PTH

d)

All of the above

60.

Which hormone regulates colour of skin ?

a)

MSH

b)

LH

c)

PTH

d)

LTH

61.

It is required for differentiation of T-cells

a)

T3

b)

Thymosin

c)

T4

d)

Melatonin

62.

Chemically the hormones are

a)

Steroids only

b)

Proteins, steroids and biogenic amines

c)

Proteins only

d)

Biogenic amines only

63.

Children who have damaged thymus may result in_____________

a)

Loss of an antibody-mediated immunity

b)

Reduction in stem cell production

c)

Deafness

d)

Loss of cell-mediated immunity

64.

Deficiency of this element causes the thyroid gland to swell up

a)

Calcium

b)

Iodine

c)

phosphorous

d)

None of the above

65.

The hormone that participates in metabolizing calcium and phosphorous are called _____

a)

Glucagon

b)

Calcitonin

c)

Glycogen

d)

None of the above

66.

_______ controls the concentration of urine

a)

ADH

b)

Oxytocin

c)

ACTH

d)

GH

67.

Endocrine glands produce or action of endocrine glands is mediated through:

a)

Hormones

b)

Enzymes

c)

Minerals

d)

Vitamins

68.

Which of the following does not secrete any hormone?

a)

Spleen

b)

Ovary

c)

Testes

d)

Pancreas

69.

The posterior pituitary gland is not a 'true' endocrine gland because :- …[NEET 2016]

a)

a) It is under the regulation of hypothalamus

b)

b) It secretes enzymes

c)

c) It is provided with a duct

d)

d) It only stores and releases hormones

70.

Which hormone 's secretion increases in emergency?

a)

Thyroxine

b)

Parathormone

c)

Adrenaline

d)

Aldosterone

71.

It is correct for the functions of pineal gland ?

a)

To maintain ovarian follicle

b)

Self defence capability

c)

To maintain mineral ions in the body

d)

Loss of water from body

72.

FSH and LH hormones together are called :

a)

GTH

b)

Stress removing hormones

c)

Emergency hormones

d)

Neurohormones

73.

Vasopressin is found in

a)

Posterior lobe of pituitary

b)

Intestine

c)

Kidney

d)

Liver

74.

On seeing a tiger the heart-beat and blood pressure increases due to release of hormone.

a)

Corticoids

b)

Thyroxine

c)

Adrenaline

d)

Parathormone

75.

Which hormone is secreted by zona fasciculata?

a)

ADH

b)

Mineralocorticoids

c)

Glucocorticoids

d)

Hydrocorticoids

76.

Secretions of which of the following is necessary for increase in uptake of glucose by liver and adipose cells ?

a)

Alpha cells of islets of langerhans

b)

Beta cells of islets of langerhans

c)

Delta cells

d)

Beta cells of pancreatic acini

77.

Which of the following stimulates adrenal gland in an emergency ?

a)

Adrenal medulla

b)

CNS

c)

PNS

d)

Mid-brain

78.

The calcium level is increased in blood by promoting

a)

Dissolution of skeletal structures

b)

Excretion of calcium in urine

c)

Mineralisation of bones

d)

Mineralisation of teeth

79.

Glucocorticoids are produced by

a)

Zona reticularis

b)

Adrenal medulla

c)

Zona fasciculata

d)

Zona glomerulosa

80.

Which of the following is caused due to hypersecretion of thyroxin hormone?

a)

Goitre

b)

Exophthalmic goitre

c)

Cretinism

d)

Myxoedema

81.

Glucagon acts on liver cells and stimulates the conversion of glycogen into

a)

Fructose

b)

Sucrose

c)

Glucose

d)

Ribose

82.

Which of the following hormones control the homeostasis of glucose?

a)

Aldosterone and insulin

b)

Insulin and glucagon

c)

Thymosin and relaxin

d)

Insulin and glycogen

83.

Which of the following statements is incorrect?

a)

Insulin increases cellular uptake of glucose

b)

Insulin decreases fat synthesis

c)

Insulin increases synthesis of proteins

d)

Insulin promotes glycogenesis in liver

84.

__________ is synthesised by the growing ovarian follicles.

a)

Estrogen

b)

Testosterone

c)

Cortisol

d)

Prolactin

85.

Juxtaglomerular cells of kidney produce a hormone called

a)

Cholecystokinin

b)

Erythropoietin

c)

ADH

d)

ANF

86.

Which of the following is an amino acid derivative hormone?

a)

Estrogen

b)

Epinephrine

c)

Cortisol

d)

Insulin

87.

Vasopressin is found in

a)

Posterior lobe of pituitary

b)

Intestine

c)

Kidney

d)

Liver

88.

Secretions of which of the following is necessary for increase in uptake of glucose by liver and adipose cells ?

a)

Alpha cells of islets of langerhans

b)

Beta cells of islets of langerhans

c)

Delta cells

d)

Beta cells of pancreatic acini

89.

On seeing a tiger the heart-beat and blood pressure increases due to release of hormone.

a)

Corticoids

b)

Thyroxine

c)

Adrenaline

d)

Parathormone

90.

Which of the following option is not correct for the state of body in stress ?

a)

Increased heart-beat

b)

Increased alertness

c)

Increased glucose level of blood

d)

Rate of protein synthesis increases

91.

It is correct for the functions of pineal gland ?

a)

To maintain ovarian follicle

b)

Self defence capability

c)

To maintain mineral ions in the body

d)

Loss of water from body

92.

Correct sequence of electrical impulse transmission in a neuron is from

a)

dendrite, axon, axonal end,cell body

b)

cell body, dendrite, axon,axonal end

c)

dendrite, cell body, axon, axonal end

d)

axonal end, axon, cell body, dendrite

93.

Which is the correct sequence of the components of a reflex arc

a)

Receptors, spinal cord,sensory neuron, motor neuron, muscle

b)

Receptors, muscle, sensory neuron, motor neuron, spinal cord

c)

Receptors, sensory neuron, spinal cord, motor neuron, muscle

d)

Receptors, motor neuron, spinal cord, sensory neuron, muscle

94.

Taste receptors are

a)

Phonoreceptors

b)

Statoreceptors

c)

Olfactory receptors

d)

Gustatory receptors

95.

The microscopic gap between two adjacent neurons throgh which a nerve impulse passes is

a)

Neurotransmitter

b)

Synapse

c)

Axon terminal

d)

Dendrite

96.

Which nerves arise from the brain and emerges through the skull

a)

Spinal nerves

b)

Thoracic nerves

c)

Cranial nerves

d)

Lumbar nerves

97.

The microscopic gap between two adjacent neurons throgh which a nerve impulse passes is

a)

Neurotransmitter

b)

Synapse

c)

Axon terminal

d)

Dendrite

98.
Which type of neuron transmits a signal from the central nervous system to an effector such as a muscle?
a)
sensory
b)
motor
c)
relay
d)
dendrite
99.
Which is the correct order of events in depolarisation then repolarisation? 
a)
Sodium channels close, potassium channels open
b)
Sodium channels open, potassium channels open, 
c)
Sodium channels open, potassium channels close
d)
Potassium channels open, sodium channels open
100.

What causes the release of neurotransmitters into the cleft?

a)

an action potential reaches the terminal

b)

ligand gated ion channels open

c)

excititory neurotransmitters bind to ligand gated ion channels

d)

an action potential on the post synaptic neuron triggers nearby voltage gated ion channels

101.
What generates a nerve impulse on the post-synaptic membrane? 
a)
Calcium binding with a receptor site
b)
Potassium leaking into the post-synaptic membrane 
c)
Neurotransmitter binding with receptor sites
d)
Neurotransmitter being removed from the synapse
102.

What chemical is activated by the action potential in the presynaptic neuron that causes the vesicles containing neurotranmitters to move toward the synaptic cleft?

a)

calcium

b)

potassium

c)

sodium

d)

phosphorus

103.

What is the response in the postsynaptic cell once the acetylcholine has bound to it?

a)

In opens the Na+ gated channels and Na+ rush in

b)

It opens the Ca2+ gated channels and Ca2+ rush in

c)

It closes the K+ channels creating a resting potential

d)

It releases its own neurotransmitter into the synaptic cleft

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