In the structure of a human neuron, the nodes of Ranvier are present on | 12 | NTA NEET SET 76 ...

Nodes of Ranvier are present in

Approximately, how many neurons are present in a human brain?

The given diagram represents the structure of a human excretory system. Study the diagram and answer any of the four questions. The main waste present in the urine is:

Study the following information carefully and answer the given questions based on it. In a certain code, letters of English alphabet are coded on the basis of the structure of the word. Numeric codes denoted for the letters of the word are in the same order as the letters of the word. Study the code represented for a particular structure of the word. Find out the logic and Answer the questions that follow in two sets (I and II): Find out the code of the given word in capital letters ONCE 1) [12] [6] [6] [12] 2) [6] [24] 124] [6] 3) [12] [24] [24] [12] 4) [24] [12] [12] [24] 5) None of these

Study the following information carefully and answer the given questions based on it. In a certain code, letters of English alphabet are coded on the basis of the structure of the word. Numeric codes denoted for the letters of the word are in the same order as the letters of the word. Study the code represented for a particular structure of the word. Find out the logic and Answer the questions that follow in two sets (I and II): Find out the code of the given word in capital letters ICON 1) [12] [6] [6] [12] 2) [6] [24] [24] [6] 3) [12] [24] [24] [12] 4) [24] [18] [24] [18] 5) None of these

Study the following information carefully and answer the given questions based on it. In a certain code, letters of English alphabet are coded on the basis of the structure of the word. Numeric codes denoted for the letters of the word are in the same order as the letters of the word. Study the code represented for a particular structure of the word. Find out the logic and Answer the questions that follow in two sets (I and II): Find out the code of the given word in capital letters HOUR 1) [24] [12] [12] [24] 2) [24] [6] [6] [24] 3) [24] [6] [12] [24] 4) [6] [24] [24] [6] 5) None of these

Study the following information carefully and answer the given questions based on it. In a certain code, letters of English alphabet are coded on the basis of the structure of the word. Numeric codes denoted for the letters of the word are in the same order as the letters of the word. Study the code represented for a particular structure of the word. Find out the logic and Answer the questions that follow in two sets (I and II): Find out the code of the given word in capital letters TEN 1) [24] [36] [24] 2) [30] [24] [30] 3) [12] [36] [12] 4) [6] [36] [6] 5) None of these

Read the following statements about the internal structure of the human heart. I. Humans have a an auto - excitable , chambered , muscular and myogenic heat. II. The heart is mesodermal in origin and is present symmetrically between two lungs in the thoracic cavity. III. The opening between the right atrium and left ventricle is guarded by a tricuspid valve. IV. Only th sino - atrial node of the heart has hte ability to generate action potentials without any external stimuli. How many statement/s is/ are incorrect from the above ?

An atom is assumed to tbe spherical in shape and thus, the size of atom is generally given in terms of radius of the sphere and is called atomic radius. It is usually defined as the distance between the centre of the nucleus and outermost shell where electron are present. The exact measure of atomic radius is not easy due to following reasons: (i) The atom does not have well defined boundary. the probability of finding the electron is never zero even at large distance from the nucleus. (ii) It is not possible to get an isolated atom. the electron density around an atom is affected by the presence of neighbouring atoms, i.e., the size of the atom changes in going from one set of environement to another. (iii) the size of an atom is very small, of the order of about 1.2 Å,i.e., 1.2xx10^(-10)m . An estimate of the size of the atom can, however, be made by knowing the distance betweent he atoms in the combined state. the distance between the atoms, i.e., bond length are generally measured by the application of techniques such as X-ray differaction, electron diffraction, infrared spectroscopy, nuclear magnetic resonance spectroscopy, etc. However, bond lengths change with different type of bonding. Three types of radius are commonly used, i.e., (a) Covalent radius " " (b) crystals radius " " (c) Vander waal's radius The correct order of effective nuclear charge Z_(eff) is

An atom is assumed to tbe spherical in shape and thus, the size of atom is generally given in terms of radius of the sphere and is called atomic radius. It is usually defined as the distance between the centre of the nucleus and outermost shell where electron are present. The exact measure of atomic radius is not easy due to following reasons: (i) The atom does not have well defined boundary. the probability of finding the electron is never zero even at large distance from the nucleus. (ii) It is not possible to get an isolated atom. the electron density around an atom is affected by the presence of neighbouring atoms, i.e., the size of the atom changes in going from one set of environement to another. (iii) the size of an atom is very small, of the order of about 1.2 Å,i.e., 1.2xx10^(-10)m . An estimate of the size of the atom can, however, be made by knowing the distance betweent he atoms in the combined state. the distance between the atoms, i.e., bond length are generally measured by the application of techniques such as X-ray differaction, electron diffraction, infrared spectroscopy, nuclear magnetic resonance spectroscopy, etc. However, bond lengths change with different type of bonding. Three types of radius are commonly used, i.e., (a) Covalent radius " " (b) crystals radius " " (c) Vander waal's radius Choose incorrect option regarding atomic radius