Homeostasis Flashcards
What is the definition of homeostasis
controlling the internal environment of the body at stable levels
What word is this the definition of: controlling the internal environment of the body at stable levels
homeostasis
What is negative feedback
a response to a stimulus that reduces the stimulus
what word is this the definition of: a response to a stimulus that reduces the stimulus
negative feedback
what are the two systems
Nervous system and Endocrine system
Is thermoregulation a nervous or chemical reaction?
nervous
is shivering a nervous or chemical reaction?
nervous
is diabetes a nervous or chemical reaction?
chemical
Is glucose a nervous or chemical reaction?
chemical
Is water a nervous or chemical reaction?
chemical
Which is not an example of homeostasis: heart rate, hydration, photosynthesis and blood flow
photosynthesis
What pathway is used when we respond to something in our environment?
nervous pathway
What is the stimulus for an eye?
light
What is the receptor for light
eye
what is the stimulus for ears
sound
what is the receptor for sound
ear
what is the stimulus for skin
pressure
what is the receptor for pressure
skin
what is the stimulus for the tongue
taste
what is the receptor for taste
tongue
what is the stimulus for the nose
smell
what is the receptor for smell
nose
What detects the stimulus
receptor
what is the next part used after a stimulus and receptor
sensory neurone
where does the sensory neurone enter
spinal nerve
what happens to the sensory neurone in the spinal nerve
it crosses a synapse to the relay neurone
what happens after crossing a synapse to the relay neaurone
it crosses a synapse to the motor neurone
where does the motor neurone leave
spinal nerve
what plate does the motor neurone move
motor end plate
What do dendrites look similar too
branches
does a neurone have a cytoplasm
yes
does a neurone have a nucleus
yes
does a neurone have chloroplasts
no
does a neurone have a cell membrane
yes
does a neurone have a cytoplasm, nucleus and cell membrane
yes
does a neurone have a nucleus, cytoplasm and chloroplasts
no
what structure has a myelin sheath
a neurone
what is a myelin sheath for
insulation
what does the myelin sheath contain within it
an axon
what is around the axon
myelin sheath
where is the nerve ending
the edge of the dendrites
What does a synapse convert an impulse into in order to travel across the gap
chemical
what is the chemical impulse converted into after crossing a synapse
electrical
why do synapses have mitochondria
synthesising proteins
where does the chemical impulse diffuse between (synapse)
neurones
what is an effector
an organ that does something in response to a stimulus
what word is this a definition of: an organ that does something in response to a stimulus
an effector
what are the two examples of an effector
muscles and glands
what are the things in neurones containing the chemicals for diffusion called
chemical transmitters
outline the key areas of a reflex arc
stimulus - receptor - sensory neurone - into spinal cord - relay neurone - motor neurone - out of spinal cord - motor end plate
state the role of the central nervous system
made up of the spinal chord and the brain
what word is this the definition of: made up of the spinal chord and the brain
central nervous system
state the role of a motor neurone
carries nerve impulses from the relay neurone to the effector organs
what word is this the definition of: carries nerve impulses from the relay neurone to the effector organs
motor neurone
state the role of a sensory neurone
carries nerve impulses from sense organs to the central nervous system
what word is the definition of: carries nerve impulses from sense organs to the central nervous system
sensory neurone
state the role of a receptor
cells are clustered together in sense organs such as eyes or skin
what word is the definition of: cells are clustered together in sense organs such as eyes or skin
receptor
state the role of stimulus
changes in the environment around you
what word is the definition for: changes in the environment around you
stimulus