Shortcut Methods

Shortcuts methods and tricks to solve numericals based on the topic “Structural Organization In Animals”:#

1. Calorific value of food: The calorific value of food can be calculated by using the formula:

Calorific value = Energy content of food (kJ/g) x Weight of food consumed (g)

2. Cardiac output: Cardiac output can be calculated by using the formula:

Cardiac output = Heart rate (beats/minute) x Stroke volume (mL/beat)

3. Time taken by a nerve impulse: The time taken by a nerve impulse to travel a certain distance can be calculated by using the formula:

Time taken = Distance (m) / Speed of nerve impulse (m/s)

4. Total magnifying power of a microscope: The total magnifying power of a microscope can be calculated by using the formula:

Total magnifying power = Magnification of objective lens x Magnification of eyepiece

5. Volume of a cell: The volume of a spherical cell can be calculated by using the formula:

Volume of the cell = 4/3 x (3.14) x (Radius of the cell)^3

6. Mass of a bone: The mass of a bone can be calculated by using the formula:

Mass of the bone = Density of bone (g/cm^3) x Volume of bone (cm^3)