Struggling On Flashcards
What are the small gaps in the myelin sheath called?
Nodes of ranvier
What does saltatory conduction refer to
The process where electrical signals jump between nodes of ranvier In myelinated axons, speeding up the transmission of nerve impulses.
What does estrogen do?
Boost breast development and uterine lining growth👏🏽
Which part of the neuron receives incoming signals
Dendrites
Which cell only contains one set of chromosome?
Haploid cells!
What does natural selection act on:
Phenotype which are the observable characteristics of an organism
Phenotype is when the genotype interacts with the environment
Who proposed the theory of the inheritance of acquired traits?
Jean Baptise Lamark
What does the cerebellum do?
Coordinates movement and balance.
What is the limbic system associated with?
Emotions, memory and motivation 🎶🎶🎶
What does the all or nothing principle mean?
An action potential either fires at full strength or none at all.
What term describes a trait that only appears if an individual has two copies of the allele?
Recessive
Which ions are found in greater concentration inside a neuron at rest?
At rest, neurons has a higher concentration of postassium ions INSIDE. They also have a higher concentration of sodium ions OUTSIDE.
What is the medulla involved in (hindbrain)
Involved in the control of the cardiovascular system, respiration, muscle tone and swallowing!
What is the basal ganglia responsible for?
Motor control
Emotions and behaviour
It is a group of subcortical nuclei
What is the motor cortex responsible for (forebrain)
Planning, controlling and voluntary movement
Where did the breakthrough of Darwin’s ideas come from?
Galápagos Islands, west of South America
