CENTRAL NERVOUS SYSTEM: It is the hollowed part of nervous system that lies along the mid dorsal part of the body. It has two parts, brain and spinal cord.
PERIPHERAL NERVOUS SYSTEM:It is solid lateral part of nervous system that develops from CNS and connects different parts of the body with CNS. PNS has two components voluntary and involuntary.
wave energy
The cartilaginous rings cover the trachea to prevent from getting collapsed.
he chemical name of bleaching powder is calcium oxychloride and its chemical formula is CaOCl2. It is prepared by passing chlorine gas through dry slaked lime. Following is the chemical equation for the reaction
Ca(OH)2 + Cl2 → CaOCl2 + H2O
Sulphur is non-metal because
(1) Number of electrons in the valence shell is more than 4 i.e., 6 unlike metals which have valence electrons less than 4.
(2) It has tendency to accept electrons.
(3) It is non-lustrous.
(4) It burns in air to form sulphur dioxide which is an acidic oxide as non-metals react with air to form acidic oxide.
S + O2 → SO2
Magnesium is metal because
(1) Number of valence electrons is less than 4 i.e., 2 unlike non-metal which have valence electrons more than 4.
(2) It has tendency to lose electrons as the ionisation energy is low.
(3) It exhibits lusture.
(4) It burns in air to form MgO which is a basic oxide as metals form basic oxide with air.
2Mg + O2 → 2MgO
Auxins are the growth regulators generally produced by the growing apices of roots and stem. They are present at the tip of the tendril but when tendril touches any support , the growth will be slowed down as auxins are sensitive to touch, thus migrate from the tip to other regions of their actions thereby promoting growth of parts around the object/support.
a. blood
b. CO2 from various organs will be collected by the blood through veins and passed to heart and transported to lungs which was the exhaled through nose.
CO2 was formed as a result of aerobic metabolism of various cells
then food from stomach digested and absorbed in , –> small intestine (remaining waste)–> large intestine–>ejected out through annus.
NO2 will be transported as amine through amino acids.. in which amino group transferred in liver. the urea is transported to kidney where they are excreted out through urine via urethra
1. When the bar magnet is pushed into the coil the momentary deflection is observed in the galvanometer. This deflection indicates that momentary current is produced in the coil.
2. In pulling the magnet out of the coil, the deflection is indicated in the opposite direction.It indicates the current in the coil is in opposite direction.
3. When the magnet is held stationary inside the coil there is no deflection in the galvanometer. It indicated that no current is produced in the coil.
The nervous system:
The nervous system is responsible for coordinating all of the body’s activities. It controls not only the maintenance of normal functions but also the body’s ability to cope with emergency situations.
Function:
The nervous system has three general functions: a sensory function, an interpretative function and a motor function.
1.Sensory nerves gather information from inside the body and the outside environment. The nerves then carry the information to central nervous system (CNS).
2.Sensory information brought to the CNS is processed and interpreted.
3.Motor nerves convey information from the CNS to the muscles and the glands of the body.
The current flowing through the bulb causes the temperature and therefore the resistance of its tungsten filament to change during the experiment.
We know that one of the essential condition of Ohm’s law is that a changing temperature must not allowed to affect the resistance of the load.It means in this case of using bulb in place of resistor the ratio of voltage to current varies continuously throughout the experiment. Therefore tungsten(hence bulb) does not verify ohm’s law.
cerebro spinal fluid it acts as a shock absorber for brain and the bony box protects the brain from external attacks. the bony box is also called cranium.
vertebral column – spinal cord
It consists of two types of nerves.
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Cranial nerves: There are 12 pairs of cranial nerves and they emerge from the brain and reach the organs in the head region.
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Spinal nerves: There are 31 pairs of spinal nerves that emerge from the spinal cord and reach various parts of the body.
please revise extraction of copper
A voltmeter is always connected in parallel because if it is connected in series, it will change the value of potential difference to be measured by minimising the current in the circuit as it has very large resistance and hence will give faulty reading. Connecting it in parallel will not change the value of potential difference being measured as the voltmeter will draw negligible current and hence give correct reading of potential difference
Activity 13.7 in the NCERT textbook demonstrates the same. The force will be maximum when the magnetic field is perpendicular to the direction of current.
Fleming’s Left hand rule gives the direction of the force.