Homeostasis and Senses Flashcards
Module 3
What are the lobe of the brain
Frontal, parietal, temporal and occipital
What is the frontal lobe responsible for
decision making and planning
the ability to perform complex tasks is due to what brain lobe
parietal lobe
processing sounds is a function of what lobe
temporal lobe
the occipital lobe is responsible for
processing visual info
Why is white matter white
myelinated glial cells on axons
What matter is mostly made of packed neuron cell bodies and dendrites
gray matter
What is homeostasis
internal functions that keep our bodies stable
what is a neuron
basic function of nervous system. they have electrical properties and are used for communication
animals sensory detectors can detect which of the following
chemical
physical
electromagnetic
all of the above
what purpose do interconnected cells have
they come together to make networks which then can be used by the animal to detect environmental responses
explain neuron organziation
dendrites -> soma/cell body -> nucleus -> axon hillock -> axon (where action potential occurs) -> axon terminal -> presynaptic cell -> synaptic cleft -> post synaptic cell
T/F the inside of a cell at rest is +ve in relation to the outside
F. there is an overall negative charge with a negative resting membrane potential (negative voltage)
Where can you find interneurons
spinal cord (grey matter)
What neuron would be located in a muscle
motor
what neurons would be located in the dorsal root ganglia
sensory
Name the three types of neurons
sensory, motor and interneuron
describe an action potential
1.) resting potential (-70)
2.) summed input/stimulus depolarizes cell membrane in the axon hillock
3.) excitation threshold is reached
4.)
voltage-gated Na+ channels open. Spike in membrane potential (K+ channels opens slower) (+50/+40)
5.) Na+ channels close, K+ channels continue to stay open
6.) hyperpolarization (influx of K+)
5.) adjustment to reach cell equilibrium
What are astrocytes
specialized glial cells in blood-brain barrier
What is a glial cell
A non-electrical cell used as insulation and support to neurons
A neuron moving towards the brain is a
afferent neuron, travelling via CNS
efferent neurons go
to effector organs
What two things integrate and process info in local regions
interneurons and ganglia (in local regions = CNS)
What is the purpose of the autonomic nervous system
broken into sympathetic, parasympathetic and enteric nervous system. regulates digestive system (enteric system) and smooth muscles, cardiac muscles, exocrine glands and some endocrine glands (sympathetic and parasympathetic systems)
Parasympathetic nervous system is known for it’s regulation of
rest + digest
This nervous system is responsible for your flight/fight
sympathetic system
An organism that adjusts to the environment to maintain body temperature is known as
Poikilotherms
An organism that produces their own heat is known as
Endotherm
An ectotherm regulates body temperature by
heat from environment
This organism has a relatively constant body temperature no matter the environment
Homeotherm
What are the three receptors found in animals
chemo, mechano and photo
The section of the brain responsible for perception, memory and learning is the
cerebral cortex
the section of the brain responsible for transmitting sensory info is the
thalamus
the hypothalamus is responsible for
autonomic and enteric system
the hindbrain is made up of
medulla, pons and cerebellum
