Exam 2 Flashcards
_______ cells come in a variety of different sizes and shapes, and all have specific functions.
Human
Human cells come in a variety of sizes and shapes, and all have specific ________
Functions
Cells are the smallest unit of ____ and can perform many functions to maintain homeostasis.
Life
Cells are the smallest unit of life and can perform many functions to maintain ____________
Homeostasis
Who was the first person to discover cells using a microscope?
Robert Hooke
Robert hook proposed ________, which has three parts.
Cell theory
How many parts does cells theory have?
Three
What are the three parts to cell theory?
- All living things are made of cells
- The cell performs all functions necessary for life.
- All cells come from preexisting cells.
Humans are _______, meaning they have a membrane-bound nucleus.
Eukaryotic
Most cells have ___ nucleus
One
The nucleus is the _______ center of the cell
Control
The _______ holds the genetic material of the cell (DNA)
Nucleus
The nucleus is surrounded by a nuclear _________ with pores
Membrane
Inside the nucleus is a nucleolus where _______ is made
rRNA
Inside the nucleus is a ________ where rRNA is made.
Nucleolus
The _____________ is connected to the nuclear membrane
Rough ER
The _____ ER is studded with ribosomes
Rough
Which ER is studded with ribosomes?
Rough
Which ER is responsible for the synthesis and modification of proteins that are for export?
Rough
Which ER lacks ribosomes?
Smooth
Which ER is responsible for making phospholipids for the cell membrane or steroid lipids for hormones?
Smooth
In some cells (muscle), the _______ ER can store calcium
Smooth
What is smooth endoplasmic reticulum responsible for?
Making phospholipids for the cell membrane or steroid lipids for hormones
Smooth ER lacks _______
Ribosomes