AIPMT-PRELIMS Zoology Neural Control and Coordination Class 11 Questions

The human hind brain comprises three parts, one of which is

A person entering an empty room suddenly finds a snake right in front on opening the door. Which one of the following is likely to happen in his neuro-hormonal control system?

The purplish red pigment rhodopsin contained in the rods type of photoreceptor cells of the human eye, is a derivative of

When a neuron is in resting state i.e. not conducting any impulse, the axonal membrane is

Alzheimer disease in humans is associated with the deficiency of:

During the propagation of a nerve impulse, the action potential results from the movement of:

During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric change?

Which one of the following pairs of structures distinguishes a nerve cell from other types of cells?

Which one of the following statements is correct?

Which one of the following not act as a neurotransmitter?

Which one of the following characters is not typical of the class-mammalia?

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

Four healthy people in their twenties got involved in injuries resulting in damage and death of a few cells of the following. Which of the cells are least likely to be replaced by new cells?

In the resting state of the neural membrane, diffusion due to concentration gradients, if allowed, would drive :-

What used to be described as Nissel granules in a nerve cell are now identified as :-

Which of the following statement is correct for node of Ranvier of nerve :-

In which animal nerve cell is present but brain is absent:

Depolarization of axolema during nerve conduction takes place because of :