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Which one of the following animals has two separate circulatory pathways?
A diagram showing the axon terminal and synapse is given. Identify correctly at least two of A-D:
Acetone is treated with excess ethanol in the presence of hydrochloric acid. The product obtained will be:
The nerve centres which control the body temperature and the urge for eating are contained in:
When a neuron is in resting state i.e., not conducting any impulse, the axonal membrane is:
Receptor sites for neurotransmitters are present on:
Match List-I with List-II: List-I A. Schwann cells B. Synaptic knob C. Bipolar neurons D. Multipolar neurons List-II I. Neurotransmitter II. Cerebral cortex III. Myelin Sheath IV. Retina
The human hindbrain comprises three parts, one of which is:
Given below are two statements: Statement I: Biot-Savart's law gives us the expression for the magnetic field strength of an infinitesimal current element (Idl) of a current-carrying conductor only. Statement II: Biot-Savart's law is analogous to Coulomb's inverse square law of charge q, with the former being related to the field produced by a scalar source, (Idl) while the latter being produced by a vector source, q.
A beam of light consisting of red, green, and blue colours is incident on a right-angled prism. The refractive index of the material of the prism for the red, green, and blue wavelengths is 1.39, 1.44, and 1.47 respectively. The prism will:
Select the answer with correct matching of the structure, its location and function:
Select the incorrect statement regarding synapses:
Injury localized to the hypothalamus would most likely disrupt:
The first movements of the foetus and the appearance of hair on its head are usually observed during which month of pregnancy?
A source of sound S emitting waves of frequency $100 \text{ Hz}$ and an observer O are located at some distance from each other. The source is moving with a speed of $19.4 \text{ m/s}$ at an angle of $60^{\circ}$ with the source-observer line as shown in the figure. The observer is at rest. The apparent frequency observed by the observer (velocity of sound in air $330 \text{ m/s}$), is:
If the rate constant for a first order reaction is $k$, the time ($t$) required for the completion of 99% of the reaction is given by:
The parts of the human brain that help in the regulation of sexual behavior, expression of excitement, pleasure, rage, fear, etc. are:
Brain stem of the human brain consists of:
Which part of the brain is responsible for thermoregulation?
Myelin sheath is produced by: