Nervous And Endocrine System Flashcards
Role of spinal cord
Controls reflex actions and passes messages from the PNS to the brain
Role of the brain
Controls decision making and complex thought
What is the CNS divided into
The brain and spinal cord
What is the role of the peripheral nervous system
Sends sensory information from the world to the CNS and back
What is the peripheral nervous system divided into
The somatic nervous system and the autonomic nervous system
Role of the somatic nervous system
Receives information from sensory receptors and controls voluntary muscle movement by sending info to muscles
Role of the autonomic nervous system
Controls vital automatic functions such as heart rate and breathing
Located in brain stem
What is autonomic nervous system split into
The sympathetic nervous system and the parasympathetic nervous system
Role of the sympathetic nervous system
Initiates the fight or flight response which provides energy for vital functions
Role of the parasympathetic nervous system
Initiates the rest and digest response which conserves energy for vital functions so increases digestion and decreases heart rate and breathing
Roles of the endocrine system
-regulates cell/organ activity and controls vital physiological processes in the body
-releases hormones from glands into the bloodstream which then bind with specific receptors to regulate the activity of cells in the body
What can an imbalance in hormones cause
May lead to dysfunction eg PCOS or hyperthyroidism
Steps of the fight or flight response
-hypothalamus detects a threat in the environment
-this activates the sympathetic nervous system initiating the fight or flight response
-hormone adrenaline is released from the adrenal glands into the bloodstream
-this then causes physiolological changes to happen in the body
-once the threat has passed the parasympathetic nervous system is activated initiating rest and digest and homeostasis occurs
Role of the nervous system
Collect, process and respond to info in environ, and coordinate the working of dif organs and cells in the body
Examples of glands and the hormones they release
Adrenal glands release adrenaline, thyroid thyroxine which increases hr, pineal gland melatonin produced when it’s dark causing drowsiness, testes testosterone and ovaries oestrogen
