Bio Test 4 Flashcards
What are the functions performed by the three types of neurons?
Sensory neurons takes in information from sensory receptors to the CNS,inter neurons occur within the CNS and motor neurons takes information from the CNS to The effectors.
What is an action potential and what are it’s two parts ?
An action potential is a rapid change in polarity as the nerve impulse occurs. It’s two parts are depolarization and repolarization.
Explain the transmission of a nerve signal across a synapse
Transmission of a nerve impulse from one neuron to another takes place at a synapse when a neurotransmitter molecule is released from an axon pulls into a synaptic cleft.
Name the three major parts of the brain
Cerebrum , cerebellum, Brainstem
What are associations areas and what roles do they play?
Association areas where integration occurs,are located in all the lobes, necessary to higher mental function.
Describe the various types of memory
Short term memory- maxes out,dependent upon,very quick
Long term memory- includes semantic memory and episode memory
Skill memory- performing motor activities such as instruments.
Distinguish between somantic and autonomic nervous system.
The nerves in the somatic system serves the skin, skeletal muscle and tendons. It’s a voluntary system. The autonomic nervous system regulates the activity of cardiac and smooth muscles and glands. It handles involuntary movements.
Distinguish between exteroreceptors and interoreceptors.
Exteroreceptors detect stimuli from outside the body while interoreceptors detect internal stimuli
What are three abnormalities from misshapen eyes?
Nearsighted,farsighted, astigmatism
Which structures are involved in equilibrium?
The semicircular canals and the hair embedded cells in them
What type of cell division produce gametes and why it is important
Meiosis produces gametes, it is important because it produces half of the chromosomes.
