NEET Zoology Neural Control and Coordination Class 11 Questions

Somatic neural system and autonomic neural system are the two divisions of

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

Upon arrival of a stimulus, the polarised state of a resting neuronal membrane is reversed by

How many pairs of cranial nerves are present in frog

Which statements are incorrect for mechanisms of nerve impulse conduction along electrical junctions of neuron or electrical synapse?

(i) Nerve impulse flow directly from one neuron to other across the synapses in electrical synapses.

(ii) Transmission of an impulse across electrical synapses is very similar to impulse conduction along a single axon.

(iii) Impulse transmission across an electrical synapse is always faster than that across a chemical synapse.

(iv) Electrical synapses are rare in our system.

(v) At an electrical synapse, the membranes of the pre and post-synaptic neurons are separated by a fluid-filled space called synaptic cleft is thick.

(vi) Chemicals called neurotransmitters are involved in the transmission of impulses at this synapse.

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 charge?

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?

Assertion: Axoplasm inside the axon contains high concentration of K⁺ low concentration of Na⁺ when neuron is not conducting any impulse. Reason: The axonal membrane is comparatively more permeable to potassium ions (K⁺) and nearly impermeable to sodium ions (Na⁺).

The part of brain with the great influence over the endocrine system is

Match column I with column II and choose the correct option.

The factor responsible for repolarisation of an axonal membrane is

Neurotransmitters, released by the presynaptic neurons bind to the receptors on the

A man is admitted to a hospital. He is suffering from an abnormally low body temperature, loss of appetite and extreme thirst. His brain scan would probably show a tumor in

Read the following statements and answer as directed afterwards.

1. Sodium-potassium pump helps in maintaining the resting membrane potential across the resting membrane or axolemma
2. Sodium-potassium pump works against the concentration gradient.
3. Sodium-potassium pump transports 3 sodium ions outwards for 2 potassium ions into the cell. How many of the above statements are correct.

What would an injury localized to the hypothalamus most likely disrupt?

How many statements are correct for resting state of axon?

(i) The axoplasm inside the axon contains high concentration of K⁺ and negatively charged proteins and low concentration of Na⁺.

(ii) In contrast, the fluid outside the axon contains a low concentration of K⁺, a high concentration of Na⁺ and thus form a concentration gradient.

(iii) The outer surface of the axonal membrane possesses a positive charge while its inner surface becomes negatively charged.

(iv) The electrical potential difference across the resting plasma membrane is called as the resting potential.

(v) Resting stage is depolarised state.

(vi) Resting potential is positive potential.

What is the layer of cells that covers the cerebral hemisphere called?

What structure connects the left and right cerebral hemispheres in the human brain?

What is the deep cleft that divides the cerebrum into two halves called?

What is released by synaptic vesicles in the synaptic cleft during synaptic transmission?

What occurs at the synapse when neurotransmitters bind to the post-synaptic membrane?

What is the primary function of neurotransmitters in synaptic transmission?

What is the electrical potential difference across the resting plasma membrane called?

What is the electrical potential difference across a resting plasma membrane called?

What structure at the distal end of an axon terminates as a bulb-like formation?

What term is used for the bulb-like structures at the distal end of an axon?

Which part of the human nervous system is primarily responsible for information processing and control?

What is the primary role of the cerebral cortex in the human brain?

What structure connects the left and right cerebral hemispheres in the human brain?

What type of synapse allows electrical current to flow directly from one neuron to another?

What type of synapse allows electrical current to flow directly from one neuron to another?

What type of synapse allows electrical current to flow directly from one neuron to another?

What is the electrical potential difference across the resting plasma membrane called?

What is the electrical potential difference across the resting plasma membrane called?

What structure connects the left and right cerebral hemispheres in the human brain?

What is the primary function of the central nervous system (CNS) in humans?

What is the primary function of the cerebral cortex in the human brain?

What is the function of neurotransmitters in synaptic transmission?

What type of synapse allows electrical current to flow directly from one neuron to another?

What is the term for the electrical potential difference across a resting plasma membrane?

What is the primary function of neurotransmitters in synaptic transmission?

Which type of neuron is characterized by having one axon and two or more dendrites?

What is the structure at the distal end of an axon that terminates as a bulb-like structure containing neurotransmitters?

What is the electrical potential difference across the resting plasma membrane known as?

What structure at the distal end of an axon contains synaptic vesicles with neurotransmitters?

Which of the following combinations accurately describe the structure and function of the human nervous system?

Which of the following statements about the structure of the human nervous system is correct?

Which of the following statements about the structure of the human nervous system is correct?

What are the bulb-like structures at the distal end of an axon called?

Which of the following statements about synaptic transmission is correct?