PNS

Q. Which of the following statement(s) is/are true?
1. Somatic neural system transmit impulses from CNS to skeletal muscles.
2. Autonomic neural system transmits impulses from CNS to involuntary organs and smooth muscles.
3. Unmyelinated nerve fibres are found in spinal and cranial nerves
4. Myelinated nerve fibres are found in autonomous and the somatic neural systems.

1. 1 and 3 only
2. 3 and 4 only
3. 1 and 2 only
4. 1, 2 and 4 only

Q.

Nerves that carry messages from the brain to the body parts.

Q. Which of the following statement(s) is/are true?
1. Somatic neural system transmit impulses from CNS to skeletal muscles.
2. Autonomic neural system transmits impulses from CNS to involuntary organs and smooth muscles.
3. Unmyelinated nerve fibres are found in spinal and cranial nerves
4. Myelinated nerve fibres are found in autonomous and the somatic neural systems.

1. 1 and 2 only
2. 1 and 3 only
3. 3 and 4 only
4. 1, 2 and 4 only

Q. What is a Idioblast cell?

Q.

The function of our visceral organs is controlled by

(a) sympathetic and somatic neural system

(b) sympathetic and parasympathetic neural system

(c) central and somatic nervous system

(d) None of the above

Q. Assertion: Effect of sympathetic nervous system is excitatory in order to meet an emergency.
Reason: Sympathetic nervous system is a division of the autonomic nervous system.

1. Both the assertion and reason are true and the reason is the correct explanation for the assertion
2. Assertion is true but the reason is false
3. Both the assertion and reason are true but the reason is not the correct explanation for the assertion
4. Reason is true but the assertion is false

Q. Assertion: Motor neurons are efferent neurons.
Reason: Motor neurons conduct nerve impulses from effector organs to the brain.

1. Both the assertion and reason are true and the reason is the correct explanation for the assertion
2. Both the assertion and reason are true but the reason is not the correct explanation for the assertion
3. Reason is true but the assertion is false
4. Assertion is true but the reason is false

Q.

Motor nerve carries messages to the brain.

1. True
2. False

Q.

Name the different types of nerves. Write their functions.

Q. Which of the following is part of the central nervous system?

1. Brain and cranial nerves
2. Spinal cord and spinal nerves
3. Brain and spinal cord
4. Cranial and spinal nerves

Q. Assertion: Motor neurons are efferent neurons.
Reason: Motor neurons conduct nerve impulses from effector organs to the brain.

1. Both the assertion and reason are true and the reason is the correct explanation for the assertion
2. Both the assertion and reason are true but the reason is not the correct explanation for the assertion
3. Assertion is true but the reason is false
4. Reason is true but the assertion is false

Q.

Define motor neuron.

Q. In humans, the total number of motor cranial nerves (in pairs) is:

1. Three
2. Four
3. Five
4. Six

Q.

___carry messages from the brain or spinal cord to all the muscles and body organs.

Q. Afferent nerves carry impulses from _____ to _____.

1. CNS, receptors
2. receptors, CNS
3. CNS, muscle
4. effector organ, CNS

Q. Match the following:
$\begin{array}{cc}\text{A. Cranial nerves}& \text{1. 5 pairs}\\ \text{B. Sacral nerves}& \text{2. 12 pairs}\\ \text{C. Coccygeal nerves}& \text{3. 8 pairs}\\ \text{D. Cervical nerve}& \text{4. 1 pair}\end{array}$

1. A-3, B-1, C-2, D-4
2. A-2, B-3, C-1, D-4
3. A-2, B-1, C-4, D-3
4. A-3, B-1, C-4, D-2

Q. Assertion: Effect of sympathetic nervous system is excitatory in order to meet an emergency.
Reason: Sympathetic nervous system is a division of the autonomic nervous system.

1. Both the assertion and reason are true and the reason is the correct explanation for the assertion
2. Both the assertion and reason are true but the reason is not the correct explanation for the assertion
3. Assertion is true but the reason is false
4. Reason is true but the assertion is false

Q.

Nerve which carries nerve impulse from tissue to central nervous system is called

1. Afferent

2. Efferent

3. Motor

4. Mixed

Q. Match the following:
$\begin{array}{cc}\text{A. Cranial nerves}& \text{1. 5 pairs}\\ \text{B. Sacral nerves}& \text{2. 12 pairs}\\ \text{C. Coccygeal nerves}& \text{3. 8 pairs}\\ \text{D. Cervical nerve}& \text{4. 1 pair}\end{array}$

1. A-3, B-1, C-2, D-4
2. A-2, B-3, C-1, D-4
3. A-2, B-1, C-4, D-3
4. A-3, B-1, C-4, D-2

Q.

Differentiate between the following pairs on the basis of what is mentioned within brackets:

Spinal nerves and Cranial nerves (Number of nerves)

Q. As compared to sympathetic nervous system parasympathetic nervous system

1. Dilates pupil
2. Causes goose bumps
3. Inhibits salivation
4. Contracts urinary bladder

Q. The anterior (Ventral) root of the spinal nerve is composed of

1. Somatic sensory and visceral motor fibres
2. Somatic motor and visceral sensory fibres
3. Somatic motor and visceral motor fibres
4. Somatic sensory and visceral sensory fibres

Q.

FInd the correct function of the efferent nerves from the following options.

1. Conduct information from CNS to the effector organ

2. Conduct information from effector organ to the CNS

3. Both A and B

4. Neither A nor B

Q.

Differentiate between:
(c) Spinal nerves and cranial nerves.

Q. Afferent nerves carry impulses from _____ to _____.

1. CNS, receptors
2. receptors, CNS
3. CNS, muscle
4. effector organ, CNS

Q. One of the examples of the action of the autonomous nervous system is:

1. Knee-jerk response
2. Pupillary reflex
3. Peristalsis of the intestines
4. Swallowing of food

Q. Match the following:
$\begin{array}{cc}\text{A. Cranial nerves}& \text{1. 5 pairs}\\ \text{B. Sacral nerves}& \text{2. 12 pairs}\\ \text{C. Coccygeal nerves}& \text{3. 8 pairs}\\ \text{D. Cervical nerve}& \text{4. 1 pair}\end{array}$

1. A-3, B-1, C-2, D-4
2. A-2, B-3, C-1, D-4
3. A-2, B-1, C-4, D-3
4. A-3, B-1, C-4, D-2

Q. Which of the following cranial nerve regulates the heartbeat?

1. IV
2. VII
3. X
4. All of the above

Q. One of the examples of the action of the autonomous nervous system is

1. Peristalsis of the intestine
2. Papillary reflex
3. Knee-jerk response
4. Swallowing of food

Q. Systole of heart is initiated by

1. SA node
2. AV node
3. Purkinje fibers
4. None of the above