Cell as basic unit of life lesson 1: lectures 1 and 2 Flashcards
What did zacharias janssen and hans lippershey discover ?
in 1585 janssen started producing the microscope
what did anton leeuwenhook discover?
1667 made his own small microscope and first saw and described living cells in saliva(oral bacteria) . he called them animacules .
what did robert hooke discover?
1665 he observed a slice of cork and discovered that it was made of small chambers which he dubbed “cells”
who put forward the cell theory?
schlieden(plant cell) and schwan (animal cell)
what was the original cell theory ?
- ) all living organisms are composed of cells
- )cell is fundemental unit of structure and function in living organism
all cells arise from pre-existing cells through the process of cell division (schwan believed this) (schliden believed that the cells were newly formed by crystallization )- this point wasn’t in the original cell theory
what did rudolf virchow discover?
he confirmed that all cells do infact come from preexisting cells .
modern cell theory .
.
what cell can be seen by the naked eye?
ovum (1mm)
what is the order of size in increasing order?:
bacterial , animal , plant
what cell is responsible for forming enamel?
ameloblasts (4 micrometer in diameter and 40 micrometer in length)
cells can change shape because of?
function
what does leukocyte mean?
white cells
what are examples of multi cellular organism?
plant , animal , fungi
what is candida albicans ?
fungi that is present in mouth but when it predominates the oral cavity white formations will start appearing on the tongue
what are specialized cells?
cells designed to carry out a specific job or function (ex: sperm , red blood cell)
