A1.1 Inter system Communication
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what does the nervous system focus on
controlling and generating movement
what does the endocrine system focus on
helps control the body’s activities by releasing hormones
What do the endocrine and nervous system work together to do
maintaining homeostasis
Nervous system 3 main functions
Sensory function- detecting internal stimuli ex. increased blood acidity Integrative function - analyzing sensory info and making decisions as a response Motor Function - Take messeges around the body from the brain to the tissue/muscle
What are the three types of neurons
Sensory neurons - carry impulses from the receptor to the brain carries sensory info Interneurons - link afferent neurons to motor neurons Motor Neurons - carries impulses from the brain to the effector (muscle)
What is a reflex action
an automatic, rapid response to a stimulus that occurs without conscious thought, help protect the body from harm This quick reaction is controlled by the spinal cord or lower brain centers rather than going all the way to the upper brain so that makes the reaction faster.
Afferent Nerves
information is brought from the sensory receptors to the CNS
efferent Nerves
neurons carry information away from the CNS to the muscles and glands in order to initiate an action.
What does the central nervous system include
Brain and spinal cord
CNS
Central Nervous System
PNS
peripheral nervous system
Function of the CNS
It acts as the control center, processing and interpreting sensory information sent from the PNS and coordinating the body’s response.
Role of the CNS in communication
The CNS sends instructions to the PNS to initiate actions and manage bodily functions. It is also responsible for higher functions, like thinking, memory, and decision-making. It also plays a role in coordinating reflex responses to certain stimuli.
Components of the PNS
Divided into the somatic and autonomic nervous system
Function of the PNS
connects the CNS to the rest of the body, transmitting sensory information to the CNS and carrying out the CNS commands by activating muscles and glands
Somatic nervous system
Controls voluntary movements by activating skeletal muscles.
Autonomic nervous system
Manages involuntary functions, such as heart rate and digestion
Sub divisions of the Autonomic nervous system
divided into the sympathetic (fight or flight) and parasympathetic (rest and digest) systems.
The sympathetic nervous system
Fight or flight, speeds things up and prepares the body for action
The parasympathetic nervous system
rest and digest’ functions and is the body’s ‘housekeeping system’ (Slows things down)
brainstem
connects the brain and spinal cord and is responsible for sending messages between the two structures
Cerebellum
governs balance and coordinates skilled movements
Cerebral cortex
outermost layer and is the conscious brain, allowing athletes to think, be aware of sensory stimuli and control their movements
Whats a negative feedback loop
A negative feedback loop is basically a response from the body when conditions change from their ideal or set point and returns to this set point. Eg. you get cold and you start shivering to keep warm.