Case 1a Flashcards
Function of mitochondria?
Contain DNA, Site of ATP synthesis (energy production)
Where is mitochondrial DNA inherited from?
Mother
Function of lysosomes?
Destroy unwanted proteins and chemicals, Contain enzymes to perform this function, Break down small food molecules
Function of peroxisome organelle?
Breakdown of long chain fatty acids, which are then further broken down in mitochondria, Detoxifies harmful substances like hydrogen peroxide
Function of smooth endoplasmic reticulum?
Site of lipid and steroid synthesis
Why are there lots of smooth endoplasmic reticulum’s in the cells of the ovaries and testes?
Steroid hormone production
Functions of plasma membranes?
Retains cytoplasm, maintains cellular homeostasis, selective permeability, interacts with other cells with receptors
What is function of Golgi apparatus?
Modifies proteins by attaching carbohydrates to them, Packages proteins and some lipids received from the endoplasmic reticulum into vesicles
What is the function of the rough endoplasmic reticulum?
Coated in ribosomes, Site of protein synthesis, folding, modification and transport
What is the function of the nucleus?
Contains chromosomes, containing DNA, Site of DNA replication, transcription and RNA processing
What does DNA stand for?
Deoxyribonucleic acid
What does RNA stand for?
Ribonucleic acid
Function of ribosomes?
Site of protein synthesis, Interpret mRNA and assemble amino acid chains
Where are ribosomes found in the cell?
Free floating in the cytoplasm or attached to the rough endoplasmic reticulum
What is cytosol?
The liquid component of cytoplasm
Label a mammalian cell?
Insert photo
What are the 3 main areas of the sperm?
Head, Mid/connecting piece, Flagellum (tail)
What is contained in the head of the sperm?
Acrosome - tip of sperm’s head, Most of the sperm’s head is the nucleus
What is contained in the mid piece of the sperm?
Lots of mitochondria (to provide energy - ATP for sperm movement)
What is the flagellum of the sperm?
‘Tail’ like structure for movement
Label a sperm cell?
Insert image here
What is Zona pellucida?
A layer surrounding ovum. It contains lots of glycoproteins
What is the function of zona pellucida?
Protects egg from damage, Only allows one sperm through to fertilise the egg, Contains proteins the sperm can identify so they attach to the egg
What is corona radiata?
Layer of cells surrounding zona pellucida of ovum