Assertion Reason Test: Neural Control & Coordination - NEET MCQ

A: Sharpest vision is in fovea centralis.

R: The relationship of receptor to bipolar cells to ganglion cells is 1 : 1 : 1 within fovea centralis.

A: Postganglionic nerve fibre of parasympathetic nervous system have acetylcholine while sympathetic nervous system have adrenaline as the neurotransmitter.

R: Sympathetic nervous system inhibits the intestinal peristalsis while parasympathetic stimulates peristalsis.

A: Transmission of the nerve impulse across a synapse is accomplished by neurotransmitters.

R: Transmission across a synapse usually requires neuro-transmitters because there is small space, i.e., synaptic cleft, that separates one neuron from another.

A: Sense organs do not interpret the stimulus, it is done by the brain.

R: Sense organs are transducers. They transform the energy of a stimulus to the energy of nerve impulses.

A: The imbalance in the concentration of Na⁺, K⁺ and proteins generates the resting potential.

R: To maintain the unequal distribution of Na⁺ and K⁺, the neurons use electrical energy.

A: Retina is arranged anatomically in reverse order from what might be expected.

R: The receptor cells are, towards the outside and ganglionic cells towards the inside and light must pass through the nerve cells to reach them.

A: The brain reaches between 75 and 80 percent of adult size within the first two years, and its full size at the age of 6 years.

R: From an evolutionary point of view, human gestation period is belived to be shortening.