Neural Control and Coordination

Which is not likely to happen when we do physical exercises ?

• supply of oxygen is increased

• increase in the rate of respiration

• increase in the rate of heart beat

• decreased blood flow

Bipolar neuron are found in-

• embryonic stage

• retina of eye

• cerebral cortex

• all of these

S 1 - Unmyelinated nerve fibre is enclosed by a Schwann cell .

S 2 - Unmyelinated nerve fibre is commonly found in autonomous and the somatic neural systems.

• Both are correct

• Both are incorrect

• Only S1 is correct

• Only S2 is correct

A ) At Resting state , the axonal membrane is comparatively more permeable to sodium ions (Na+ ) and nearly impermeable to potassium ions (K+ )

B) Sodium-potassium pump transports 3 Na+ outwards for 2 K+ into the cell.

• Both are correct

• Both are incorrect

• Only A is correct

• Only B is correct

Transmission of an impulse across .............................. is very similar to impulse conduction along a single axon.

• Chemical Synapse

• Electrical Synapse

• Chemical and Electrical signal both

• neither electrical nor chemical synapse

A - The human neural system is divided into two parts - CNS and PNS

B -The autonomic neural system is classified into sympathetic and parasympathetic neural system.

• Both are correct

• Both are incorrect

• A is correct only

• B is correct only

Out of four statement how many statements are correct?

A. At electrical synapses, the membranes of pre- and post-synaptic neurons are in very close proximity

1. B. Impulse transmission across an chemical synapse is always faster than that across a electrical synapse.

2. C. Neurotransmitters are involved in the transmission of impulses at chemical synapses.

3. D. Chemical synapses are rare in our system than electric synapse

• Four statement are correct

• Three statement are correct

• Two statement are correct

• Only one statement is correct

On what basis, neurons are classified as -unipolar, bipolar or multipolar?

• Transmission of impulse

• Number of axons and dendrites

• Sensory or motor nature

• Number of nucleus within cell body

A. The released neurotransmitters bind to their specific receptors, present on the pre-synaptic membrane of neuron.

B. The new potential developed in post-synaptic neuron is always excitatory.

• A and B both are correct

• A and B both are incorrect

• Only A is correct

• Only B is correct

Which of the following statements are 'True' and 'False'?

I. The axoplasm inside the axon contains high concentration of K⁺ and negatively charged proteins.

Il. The axoplasm inside the axon contains low concentration of Na⁺.

lll. The fluid outside the axon contains a low concentration of K⁺.

IV. The fluid outside the axon contains a high concentration of Na⁺ and negatively charged proteins.

• I-True, II-False, lll-False, IV-True

• I-True, Il-True, Ill-False, IV-False

• I-True. Il-True, Ill-True, IV-False

• l-False. Il-False, lll-False. lV-True