Multiple Choice Questions in Science: Chapter 14 : CONTROL AND COORDINATION IN ORGANISMS

CHOOSE APPROPRIATE ALTERNATIVE

What is called the movement of plant toward gravity?

[A] Hydrotropism [B] Geotropism [C] Chemotropism [D] Phototropism

The plant part which exhibits negative geotropism is...
```
[A] root [B] stem [C] branch [D] leaves
```

The growth of a pollen tube towards the ovule is caused by...

[A] phototropism [B] hydrotropism [C] gravitropism [D] chemotropism

Bending of a shoot of a plant in response to light is known as...
```
[A] geotropism [B] phototropism [C] thigmotropism [D] photonasty
```
The stimulus in the process of thigmotropism is
```
[A] touch [B] gravity [C] light [D] chemical
```
Which of the following helps in maintaining posture and balance of human body?
```
[A] Cerebellum [B] Cerebrum [C] Medulla oblongata [D] Pons
```
How many pairs of nerves arise from the spinal cord?
```
[A] 21 [B] 31 [C] 41 [D] 51
```

Cerebellum, medulla oblongata and pons are the parts of...

[A] mid-brain [B] hind-brain [C] fore-brain [D] spinal cord

For the synthesis of which of the following hormones is iodine necessary?
```
[A] Adrenaline [B] Auxin [C] Thyroxine [D] Insulin
```

Which of the following is a mis-matched pair?

[A] Adrenaline and pituitary gland [B] Estrogen and ovary 
[C] Insulin and pancreas [D] Progesterone and ovary

The spinal cord originates from...

[A] cerebrum [B] cerebellum [C] medulla oblongata [D] pons

Which of the following hormones prepares our body for action in emergency situations?
```
[A] Testosterone [B] Growth hormone [C] Adrenaline [D] Insulin
```

Which of the following is male sex hormone?

[A] Estrogen [B] Adrenaline [C] Testosterone [D] Progesterone

Which of the following endocrine glands does not occur as a pair in human body?
```
[A] Adrenal [B] Pituitary [C] Testis [D] Ovary
```

Plant hormones are called...

[A] phytohormones [B] cytohormones [C] mesohormones [D] mitohormones

Which of the following hormones is a growth inhibitor?

[A] Auxin [B] Gibberellin [C] Cytikinin [D] Abscisic acid

The leaves of a sensitive plant possess a soft cushion-like structure called...
```
[A] pulmonus [B] pulvinus [C] pollenus [D] polynus
```
Which of the following plants shows thermonasty at higher temperatures?
```
[A] Lotus [B] Sunflower [C] Tulip [D] Mimosa
```
The structural and functional unit of human nervous system is...
```
[A] brain [B] nerve cell [C] axon [D] spinal cord
```
The protective and insulation sheath of myelin is found around...
```
[A] axon [B] dendrite [C] cell body [D] pons
```
The very small gap between two nerve cells is called...
```
[A] myelin [B] Ranvier's node [C] synapse [D] impulse
```

The central nervous system consists of...

[A] brain [B] spinal cord [C] brain and spinal cord [D] cerebrum and pons

The average weight of an adult human brain is ______ gm.
```
[A] 1000 [B] 1350 [C] 1530 [D] 3150
```

Pons regulates...

[A] body balance [B] blood circulation [C] blood pressure [D] respiration

Involuntary activities are controlled by...

[A] fore-brain [B] cerebellum [C] medulla oblongata [D] spinal cord

In spinal cord, the grey matter is arranged in ______ shape.
```
[A] H [B] W [C] R [D] K
```
Which of the following is not an example of reflex action?
```
[A] Sneezing [B] Yawning [C] Walking [D] Coughing
```

In reflex action ______ plays no role.

[A] brain [B] spinal cord [C] sensory neuron [D] motor neuron

The effects of sympathetic and parasympathetic nervous systems are...

[A] complimentary [B] contradictory [C] both of A and B [D] neither of A and B

Which of the following hormones is not released by pituitary gland?
```
[A] TSH [B] Thyroxin [C] ACTH [D] FSH
```
Which hormone causes ejection of milk from mammary glands?
```
[A] Vasopressin [B] Oxytocin [C] FSH [D] TSH
```

______ is antidiuretic hormone.

[A] Vasopressin [B] Oxytocin [C] FSH [D] TSH

Diabetes is caused due to the deficiency of...

[A] vasopressin [B] thyroxine [C] oxytocin [D] insulin

Goitre is caused due to the deficiency of ______ in our diet.
```
[A] iron [B] iodine [C] sodium [D] protein
```

Hypothyroidism results in...

[A] enlargement of thyroid [B] contraction of thyroid 
[C] exophthalmic goitre [D] deficiency of iodine

The hormone secreted by parathyroid gland regulates the level of ______ in blood.
```
[A] RBC & WBC [B] sugar & fat [C] calcium & phosphate [D] protein
```

______ is called 'fight or flight' hormone.

[A] Thyroxine [B] Adrenalin [C] Testosterone [D] FSH

Hormones have ______ effect.

[A] stimulatory [B] inhibitory [C] both stimulatory & inhibitory [D] nonregulatory

Animals coordinate their activities through...

[A] nervous system [B] hormones [C] both in A and B [D] brain

Which of the following is/are growth promoter hormone/s in plants

[A] Auxin [B] Abscisic acid [C] Cytokinin [D] Auxin and cytokinin

The growth of plant in the direction of stimulus is called...

[A] tropism [B] nastism [C] positive tropism [D] negative tropism

The growth of stem is known as...

[A] geotropism [B] gravitropism [C] positive geotropism [D] negative geotropism

When we touch the leaves of mimosa plant, we observe...

[A] photonasty [B] thermonasty [C] thigmonasty [D] hydronasty

The flowers of lotus and sunflower open in the morning. This is an example of...
```
[A] thigmonasty [B] thermonasty [C] photonasty [D] tropic movement
```
Opening of crocus and Tulip flowers at high temperature is an example of...
```
[A] thigmonasty [B] thermonasty [C] thermotropism [D] thigmotropism
```

The shorter fibres of nerve cell are called...

[A] dendrite [B] axon [C] synapse [D] nerve fibre

The longest fibres of nerve cell are called...

[A] dendrite [B] axon [C] synapse [D] nerve fibre

Which structure of a nerve cell receives the nerve impulse passed on by another nerve cell?
```
[A] Dendrite [B] Axon [C] Nerve fibre [D] Ranvier's node
```
By which structure does nerve impulse pass from one nerve cell to other nerve cell?
```
[A] Dendrite [B] Axon [C] Nerve fibre [D] Ranvier's node
```

After travelling through the nerve cell, the nerve impulse gets converted to...

[A] chemical signal [B] electrical signal [C] mechanical signal [D] electronic signal

The structure that protects brain is called...

[A]vertebral column [B] cranium [C] thalamus [D] corpus callosum

The brain is surrounded by membranes called...

[A] corpus callosum [B] meninges [C] thalamus [D] lobes

Which matter is present in the outer region of brain?

[A] Blue matter [B] White matter [C] Grey matter [D] Dark matter

Which matter forms the inner part of brain?

[A] Blue matter [B] White matter [C] Grey matter [D] Dark matter

Which of the following protects brain from mechanical shock?

[A] White matter [B] Grey matter [C] Dark fluid [D] Cerebrospinal fluid

Which is the largest and most complex part of human brain?
```
[A] Cerebrum [B] Cerebellum [C] Pons [D] cranium 
```

The two cerebral hemispheres are joined together by...

[A] cranium [B] pons [C] medulla oblongata [D] corpus callosum

Each cerebral hemisphere is divided into _____ lobes.
```
[A] 2 [B] 3 [C] 4 [D] 6
```

Which of the following is a highly convoluted structure?

[A] cerebellum [B] cerebral medulla [C] cerebral cortex [D] corpus callosum

Which of the following part of the brain controls and regulates blood pressure, hunger, body temperature and thirst?
```
[A] Thalamus [B] Hypothalamus [C] Medulla oblongata [D] Cerebellum
```

Which of the following coordinates the body movement?

[A] Pons [B] Medulla oblongata [C] Cerebellum [D] Corpora quadrigemina

Which of the following controls involuntary activities like coughing and sneezing?
```
[A] Pons [B] Medulla oblongata [C] Cerebellum [D] Cerebrum
```

The spinal cord is protected by...

[A] cranium [B] corpus callosum [C] pons [D] vertebral column

Which of the following nerve fibres are present in the white matter?

[A] Medullated nerve fibres and neurons with long processes 
[B] Medullated nerve fibres and neurons with short processes
[C] Nonmedullated nerve fibres and neurons with long processes
[D] Nonmedullated nerve fibres and neurons with short processes

Which of the following nerve fibres are present in the grey matter?

[A] Medullated nerve fibres and neurons with long processes 
[B] Medullated nerve fibres and neurons with short processes
[C] Nonmedullated nerve fibres and neurons with long processes
[D] Nonmedullated nerve fibres and neurons with short processes

The nervous system that controls the involuntary activities is called...

[A] autonomous nervous system [B] central nervous system
[C] independent nervous system [D] absolute nervous system

Sympathetic and parasympathetic nervous systems are parts of...

[A] central nervous system [B] autonomous nervous system 
[C] peripheral nervous system [D] special nervous system

In which part of the body are pituitary gland, pineal gland and hypothalamus are located?
```
[A] Abdominal cavity [B] Brain [C] Neck [D] Thoracic cavity
```
Melanocyte stimulating hormone is secreted from ______ pituitary gland.
```
[A] anterior [B] intermediate [C] posterior [D] dorsal
```

______ is the gland attached to the kidney.

[A] Pineal [B] Thyroid [C] Testis [D] Adrenal

_____ stimulates the absorption of water and controls the loss of water through urine.
```
[A] ADH [B] TSH [C] ACTH [D] FSH
```
A patient experienced a sudden rise in body weight up to 6 kg within a couple of weeks. Disorder of which gland is related to this condition?
```
[A] Adrenal [B] Testes/ovary [C] Pancreas [D] Thyroid
```
In which lobe of cerebrum is the centre for visual reception located?
```
[A] Frontal [B] Parietal [C] Temporal [D] Occipital
```
```
[A][B][C][D]
```

ANSWERS

(1) B (2) B (3) D (4) B (5) A (6) A (7) B (8) B (9) C (10) A (11) C (12) C (13) C (14) B (15) A (16) D (17) B (18) C (19) B (20) A (21) C (22) C (23) B (24) D (25) C (26) A (27) C (28) A (29) C (30) B (31) B (32) A (33) D (34) B (35) A (36) C (37) B (38) C (39) C (40) D (41) A (42) D (43) C (44) C (45) B (46) A (47) B (48) A (49) B (50) A (51) B (52) B (53) C (54) B (55) D (56) A (57) D (58) C (59) C (60) B (61) C (62) B (63) D (64) A (65) D (66) A (67) B (68) B (69) B (70) D (71) A (72) D (73) D (74) (75)