Biology Flashcards
Electrocardiogram (ECG)
Detects and provides a picture of the electrical signal of the heart
Ventricles
Pump blood to the body and lungs
Systole
Muscle Contraction
Diastole
When muscle relaxes
Electroencephalogram (EEG)
Test that looks at the activity of the brain
Dendrite
Receives impulses from another neurone
Axon
Impulse travels down the he myelin sheath
Myelin Sheath
A fatty cover that increases the speed of transition
Action Potential
A signal/impulse that passes down a neurone
Diffusion
Transfer of atoms from high to low energy
Depolarisation
An electrical change within a neurone from a negative charge to a positive charge
Demyelination
Myelin Sheath breaks down leading to smaller impulses and motor neurone disease
Sarcolema
Cell membrane of a striated cell
Striation
Stripy bonding appliance
Myosin
Thick fimame
Myofibril
Basic rod shaped organelle of a muscle cell
Artery
Blood vessel that carries blood away from the heart
Prokaryote
No nucleus, no organelles, always has a cell wall
Eukaryote
Has ribosomes, has a membrane, has a nucleus
Ribosomes
they are not surrounded by a membrane, protein synthesis occurs at the ribosomes
Plasmid
Small loops of DNA, Plasmids carry genes that may benefit the survival of the organism
Nucleoid
Where genetic information can be found, and it controls cellular activity
Gram positive
Purple stain
Gram Negative
Pink stain, thinner cell walls and plasma membrane
Examples of Gram Negative
Typhoid, Meningitis
Examples of gram positive
Pneumonia, Sore throat
