Human Nervous System Flashcards
What is homeostasis?
The maintenance of a constant internal environment
What does homeostasis regulate?
Body temp
Water levels
Blood glucose concentration
What are the 2 types of effectors and what are there responses?
Muscle contracts
Glands release hormones
How does a reflex action occur?
Stimulus detected by receptors
Impulses travel along sensory neurons
Chemical transmission across synapse thrigu a relay erode
Ipulses travel to motor neurons through motor neurons to effector
Effectors contract or release hormones
What is the role of relay neurons?
Connect motor and sensory neurons together
How does caffeine affect reaction time?
Caffeine reduces reaction time
State 2 control variables?
Arm position
Keep same hand
Suggest how a student confirm the reproducibility of the investigation.
Compare with another group
Look for similar results and patterns
Describe how information travels across the gap.
Diffuses as a chemical messenger or neurotransmitter
What is the role of sensory neurone?
Carry impulses from receptors to cns
What is the role of motor neurons?
Carry impulses from cns to effector
What are the steps to measure reaction time.
Person 1 places non dominant arm on table and hands on the edge
Person 2 holds ruler between person 1 hands at 0cm
Drop ruler and person 1 catch ruler as quick as possible
Measure point at which person 1 caught ruler
To improve repeat and calculate mean
