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Which is the longest part of the neuron?
Axon is the longest part of neuron that connects cell body and nerve ending. Axons are in effect the primary transmission lines of the nervous system.
Internal activities are controlled by:-
Central nervous system (CNS) controls the activities of internal organs such as hormone release, movement of food through the stomach and intestines, and the sensations from and muscular control to all internal organs.
The junction between the axon of one neuron and dentrite of the next is called
A synapse is an important part of the nervous system involved in the transmission of nerve signals.
Hormone secreted by thyroid gland is
Thyroxin is one of the major hormone secreted by thyroid gland as well as Calcitoninis a hormone secreted by the thyroid gland that reduces the concentration of blood calcium level when it has risen to an above normal level.
Which centre regulates swallowing, coughing and vomiting?
The medulla oblongata is located in the brain stem, anterior to cerebellum. This is a cone-shaped nerve cell located in the hind brain, which controls a number of involuntary functions like coughing, sneezing and vomitting.
Which Plant hormone essential for cell division ?
Cytokinin hormone is responsible for cell division that help in growth of plants. It is found in sites of active cell division in plants for example: Roots tips,seeds,fruits and leaves.
Which of the following is nastic movement?
Nastic movements are plant movements that occur in response to environmental stimuli but unlike tropic movements.
Which of the following is caused by vitamin D deficiency?
Which of the following performs dual functions i.e. both exocrine and endocrine functions?
Pancreas acts as dual gland as pancreas has the dual function of secreting hormones into blood (endocrine) and secreting enzymes through ducts (exocrine).
Which hormone cause uterine contraction that leads to labour pain?
progestrone hormone is released during parturition that creates uterine contraction like situation that cause labour pain.
Which of the following is a vector quantity?
A commutator changes the direction of current in the coil of
The magnetic field at a point due to current carrying conductor is directly proportional to
A. Current flowing through the conductor
B. Distance of the conductor
C. Resistance of the conductor
D. None of the above
Which of the following organs in the human body where the magnetic field produced is significant?
Who first detected the presence of magnetic field in earth?
The magnetic field lines due to straight wire carrying a current are-
Which of the following is incorrect?
A. Another name of field lines is lines of space
B. Neutral wire is always at zero potential
C. Heat loss in DC is less than AC
D. Electric fuse is a current generating device
‘An electric current always produces a magnetic field’ , The above statement is
An electric fuse can prevent accidents arising from-
What is the colour of phenolphthalein in soap solution?
Phenolphthalein turn pink in colour in basic solutions and soap is basic in nature.
The basic nature of sodium hydroxide (NaOH) is due to the presence of ____________ in solution.
Any compound behaves as a base when it dissociates hydroxide ions (OH-) in its solution.
Ayush and Ishoo were given one test tube each. One of the test tube contained water and the other contained a solution of sodium hydroxide. They were asked to identify the test tube containing NaOH solution. Which one of the following can be used for correctly identifying the required test tube?
A base (NaOH) turns red litmus blue but a netrul compund (water) does not show any colour change.
Which of the following properties are shown by dilute hydrochloric acid-
A. It turns blue litmus red
B. It turns red litmus blue
C. It reacts with zinc metal and a gas evolves
D. It reacts with solid sodium carbonate to give brisk effervescence
HCl being an acid turns blue litmus red.
HCl reacts with zinc metal to evolve hydrogen gas.
HCl reacts with solid sodium carbonate (Na2CO3) to evolve carbon dioxide (CO2) gas.
Which one of the following types of medicines is used for treating acidity?
Antacids are mild bases,which when given to a person suffering from acidity, neutralises the effect of excess acid produced in the stomach giving relief.
You are provided with a sample and a strip of red litmus paper. How would you confirm the nature of the sample ?
When HCl reacts with granulated zinc
Acids (HCl) reat with metals (Zn) to form salt and release hydrogen gas. The hydrogen gas evolved appears as bubbles.
A. is a transparent crystalline white solid
B. Has the chemical formula Na2CO3.10H2O
C. Gives acidic solution when dissolves in water
D. Prepared by reacting with chlorine
(C) and (D) are incorrect because the solution of washing soda in water is alkaline which turns red litmus blue. And washing soda is prepared from sodium chloride.
A, B, C, D are samples of liquids having pH values of 14, 7, 1, 5 respectively. Which of these could be that of 1 M NaOH solution?
NaOH is basic in character and higher the pH, stronger is the base.
A bud of petunias become reddish purple after first shower of rain because
The buds of Petunia act as indicators and change their color in acidic medium.As the first shower of rain is acidic, therefore the buds of Petunia change their color.