Big To Small Flashcards
Levels of organisation?
Organelles, cells, tissues, organs, organ systems, organism
Examples of each level of organisation?
- Nucleus, red blood cell, muscle tissue, heart, cardiovascular system
- Nucleus, neurons, nerves, brain, nervous system
What makes up tissues?
Cells with similar functions that are grouped together to form a tissue.
What makes up organs?
Several tissues that carry out the same function
What makes up organ systems?
Organs group with other organs to perform specific functions.
Equation for magnification?
Magnification = image size / actual size
Steps to calculate magnification? ( given the actual size)
1) measure image size with ruler in mm
2) convert mm to micrometers ( x 1000)
3) divide by actual size
Millimetres -> micrometers?
Micrometers -> millimetres?
X1000
/ 1000
Micrometers -> nanometres?
Nanometres -> micrometers?
X1000
/ 1000
Rules for biological drawings?
- only draw 2-3 cells
- title : biological drawing of …..
- magnification
- draw what you see
What do animal cells have?
Nucleus, cell membrane, mitochondria, cytoplasm
What do plant cells have?
Cytoplasm, nucleus, cell membrane, cell wall, mitochondria, vacuole, chloroplast
Function of nucleus
Largest organelle. Controls activities in the cell. Contains chromosomes which stay in the organelle.
Function of cell membrane
barrier between cytoplasm and outside of cells. Partially permeable - allows some molecule in but not others.
Function of mitochondria
Site or aerobic respiration, releases energy
Functions of chloroplast
Site of photosynthesis.
7 components of a balanced diet
Carbs, lipids, protiens, minerals, vitamins, fibre, water