Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
22 Cards in this Set
- Front
- Back
|
What is a cell?
|
the most basic unit of life, made up of microscopic units of tissue
|
|
|
What is 4 things is a cell responsible for?
|
nutrient absorption, excretion of waste, respiration, reproduction
|
|
|
What are the components of a cell?
|
cell membrane, nucleus, organelles
|
|
|
What is a cell membrane and what does it do?
|
a membrane covering the surface of a cell, it keeps the cell separate from the rest of the body
|
|
|
a cell membrane is also known as
|
a plasma membrane
|
|
|
a cell membrane is selectively permeable. What does this mean?
|
It selectively allows things to travel into through its pores by simple diffusion, facilitated diffusion and active transport mechanisms.
|
|
|
In what ways do items travels through the cell membrane?
|
simple diffusion, facilitated diffusion and active transport mechanisms
|
|
|
What is the nucleus?
|
the brain of the cell, all its information will pass on to offspring
|
|
|
Where is the nucleus located?
|
in the cytoplasm
|
|
|
What does the nuclei contain?
|
chromosomes and nucleoli
|
|
|
What do nucleoli produce?
|
ribosomes
|
|
|
What do the organelles contain?
|
Mitochondria, Ribosomes, Endoplasmic Reticulum, Golgi Apparatus, Lysosomes, Centrosome/centrioles
|
|
|
What is Mitochondria?
|
Cellular respiration; Energy removed from food and stored as ATP; Smooth outer surface, folded inner membrane; Increases surface area where ATP produced; Active components of cell; Found in large numbers in cytoplasm
|
|
|
What are Ribosomes?
|
Free floating in cytoplasm; Responsible for protein synthesis
|
|
|
What is Endoplasmic Reticulum?
|
Network of cavities and tubes lined with membranes; Inside cytoplasm; Two types (rough and smooth); RER has several ribosomes attached (bumpy look); RER transports protein; SER has smooth appearance; SER synthesizes/transports lipids and steroids
|
|
|
What is the Golgi Apparatus?
|
Stack of flattened sacks in cytoplasm; Modifies proteins by adding carbohydrates; Helps with production of lysosomes
|
|
|
What are Lysosomes?
|
Sacks in cytoplasm with digestive enzymes; Digest any foreign material in cell; Destroys old organelles
|
|
|
What are Centrosome/centrioles?
|
Used in cell division
|
|
|
What is Mitosis?
|
Somatic cells only; Cell replicates by dividing in two identical halves; Involves four active stages and one resting stage; During resting stage (interphase) cell replicates DNA for next division
|
|
|
What are the 4 stages of Mitosis
|
Prophase, Metaphase, Anaphase, Telophase
|
|
|
What is Meiosis?
|
Germ cells only; Ova/sperm have half the required chromosomes; Must occur before fertilization; Involves eight stages
|
|
|
What are the 8 stages of Meiosis?
|
Prophase, Metaphase I, Anaphase I, Telophase I, Prophase II, Metaphase II, Anaphase II, Telophase II,
|
