cells Flashcards
What do Eukaryotes have that prokaryotes don’t?
Eukaryotes have membrane-bound organelles and a Nucleus.
They both carry DNA however.
State the 3 domains and whether they’re eukaryotes or prokaryotes.
Bacteria (prokaryote)
Archea (Prokaryote)
Eukarya (Eukaryote)
what is directional terminology?
used to describe the anatomical structures or parts in relation to each other.
State all of the directional terms
Cranial & Caudal
Ventral & Dorsal
Medial & Lateral
Caudal & Rostral
Proximal & Distal
Palmar & Plantar
Superficial & Deep
External & Internal
Dorsal Recumbency & ventral Recumbency
Left Lateral recumbency & Right lateral recumbency
What are vertebrates?
species within the animal kingdom that have back bones
e.g. dog, cat, horse, human
what are invertebrates?
species within the animal kingdom that do not have a back bone.
e.g. insects, ants
State the 8 classes of taxonomy in order.
- Kingdom
- phylum
- class
- Order
- Family
- Genus
- Species
- Common name
State the 3 groups of systems that make up the basic plan of the body.
Skeletal systems - framework and transport
coorodinating systems - control mechanisms
Visceral systems - functioning systems
Define:
1. Cell Membrane
2. Cytosplasm
3. Nucleus
- covers the surface of the cell and is responsible for separating the cell from its environment and controls the passage of substances in and out of the cell.
- The fluid that fills the interior of the cell.
- The ‘information centre’ of the cell. It contains the chromosomes (bearers of DNA)
Define:
1. Mitochondria
2. Ribosomes
3. Golgi apparatus
- Responsible for cellular respiration and are the sight where energy is extracted from food substances and stored in a form the cell can use.
- Float free within the cell and are the sight for protein synthesis.
- Stack of flattened sacs within the cytoplasm. It’s function includes the modification of some of the proteins produced by the cell.
Define:
1. Endoplasmic reticulum (ER)
2. Rough ER
3. smooth ER
- produce the proteins for the rest of the cell to function
- has numerous ribosomes attached to its surface. Rough ER transports the proteins that have been synthesised by ribosomes.
- does not have ribosomes on its surface; its functions include the synthesis and transport of lipids and steroids.
Define:
1. Lyosomes
2. Centrosomes
- Function is to digest materials taken in by the cell during the process of phagocytosis or endocytosis.
- contains a pair of rod-like structures called centrioles, they are involved in cell division.
Somatic cell
All cells of the body except those involved in reproduction.
Somatic cells divide by mitosis and contain the diploid number of chromosomes.
Germ Cells
These are within the Ova (within the ovaries) and the spermatozoa (within the testes).
germ cells are divided by meiosis and contain the haploid number of chromosomes
Mitosis
Through the process of mitosis, the tissues of the body grow and are able to repair themselves when damaged, in which somatic cells of the body make identical copies of themselves.