Select the answer with correct matching of the structure, its location and function:
A | B | C | |
1. | Cerebellum | Mid brain | Controls respiration and gastric secretions |
2. | Hypothalamus | Fore brain | Controls body temperature, urge for eating and drinking |
3. | Blind spot | Near the place where optic nerve leaves the eye | Rods and cones are present but inactive here |
4. | Eustachian tube |
Anterior part of internal ear | Equalizes air pressure on either sides of tympanic membrane |
In the resting state of the neural membrane, diffusion due to concentration gradients, if allowed, would drive:
1. K+ and Na+ out of the cell
2. Na+ into the cell
3. Na+ out of the cell
4. K+ into the cell
Depolarization of axolemma during nerve conduction takes place because of:
1. | Equal amount of Na+ & K+ moves out across axolemma |
2. | Na+ ions move inside |
3. | More Na+ ions are outside |
4. | None of the above |
Which of the following statement is correct for the node of Ranvier of nerve:
1. Neurilemma is discontinuous
2. Myelin sheath is discontinuous
3. Both neurilemma & Myelin sheath are discontinuous
4. Covered by myelin sheath
1. | Impulse Transmission across a chemical synapse is always faster than that across an electrical synapse. |
2. | The membranes of presynaptic and postsynaptic neurons are in close proximity in an electrical synapse. |
3. | Electrical current can flow directly from one neuron into the other across the electrical synapse. |
4. | Chemical synapses use neurotransmitters. |
List-I | List-II | ||
(a) | Multipolar neuron | (i) | Somatic neural system |
(b) | Bipolar neuron | (ii) | Cerebral cortex |
(c) | Myelinated nerve fibre | (iii) | Retina of Eye |
(d) | Unmyelinated nerve fibre | (iv) | Spinal nerves |
(a) | (b) | (c) | (d) | |
1. | (iii) | (i) | (iv) | (ii) |
2. | (ii) | (iv) | (iii) | (i) |
3. | (ii) | (iii) | (i) | (iv) |
4. | (ii) | (iii) | (iv) | (i) |
Which part of the brain is responsible for thermoregulation?
1. Medulla oblongata
2. Cerebrum
3. Hypothalamus
4. Corpus callosum
During the transmission of nerve impulses through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric charge?
1. | First negative, then positive, and again back to negative |
2. | First positive, then negative, and continue to be negative |
3. | First negative, then positive, and then continues to be positive |
4. | First positive, then negative, and again back to positive |