Control and Coordination

Q. Solve the puzzle.

Across:
1. It is the gap between two neurons.
4. It is a component of CNS.

Down:
2. These neurons bring impulses to CNS.
3. Another name for efferent neurons.

Q.

Blinking of eyes is a reflex action.

1. Reflex action

2. Voluntary action

Q.

The trigeminal nerve arises from the brain in the region of

1. Pons and divides into ophthalmic, maxillary and mandibular branches

2. Medulla and divides into palatine, chorda tympani and hyomandibular branches
   

3. Cerebellum and divides into palatine, chorda tympani and hyomandibular branches
   

4. Cerebellum and divides into ophthalmic, maxillary and mandibular branches
   

Q.

Reflex arc is the pathway of impulses to and from the spinal cord.

1. response to external stimuli

2. instantaneous response without thought

Q. A sudden change in the external or internal environment that results in a change in the activities of an organism is known as ______.

1. stimulus
2. impulse
3. receptor
4. effector

Q.

Match Column A appropriately with Column B.

$$\begin{array}{cc}ColumnA& ColumnB\\ \text{(i)The Central Nervous System constitutes of}& \text{1.Ears, Eyes, Nose}\\ \text{(ii)Reflex arcs are formed in}& \text{2.Olfactory}\\ \text{(iii)Receptors that detect taste}& \text{3. Spinal cord and the Brain}\\ \text{(iv)Receptors that detect smell}& \text{4. Muscles and Glands}\\ \text{(v)Examples of receptor organs are}& \text{5. Gustatory}\\ \text{(vi)Examples of effector organs are}& \text{6. Spinal Cord}\\ \text{(vii)Peripheral Nervous System consists of}& \text{7. Spinal nerves from the spinal cord and cranial nerves from the brain}\end{array}$$

1. (i) – 4, (ii) – 5, (iii) – 6, (iv) – 7, (v) – 3, (vi) – 1, (vii) – 2

2. (i) – 3, (ii) – 2, (iii) – 5, (iv) – 6, (v) – 1, (vi) – 4, (vii) – 7

3. (i) – 3, (ii) – 6, (iii) – 5, (iv) – 2, (v) – 1, (vi) – 4, (vii) – 7

4. (i) – 1, (ii) – 5, (iii) – 2, (iv) – 6, (v) – 3, (vi) – 7, (vii) – 4

Q. When you touch a hot pan accidently, you pull your hand back immediately. Identify the stimulus in the above statement.

1. Touching the hot pan
2. Pulling the hand back
3. Both A and B
4. Statement is not an example of reflex

Q.

You duck your head when a baseball is thrown at your face. You are responding to:

1. An internal stimulus

2. An external stimulus

3. Hormones

4. Pigments

Q.

A number of metabolic processes are interwoven by:

1. Non-coordination

2. Subordination

3. Coordination

4. All of these

Q. The nerve which transmits impulse from ear to brain is:

1. Optic nerve
2. Occipital nerve
3. Sciatic nerve
4. Auditory nerve