Psychology Chapter 2 2
Terms
undefined, object
copy deck
- describe function of the endocrine system
- regulates and manages everything from physical growth to stree response
- Pituitary gland
- master gland; regulates other endocrine glands; releases horomones
- Thyroid Gland
- produces thyroxine; a disorder affects metabolism (weight gain)
- horomone
- stir up; excite
- Adrenal Glands accomplish...
- produces epinephrine
- two subsystems of nervous system
- PNS and CNS
- PNS
- carries messages to and from CNS
- CNS
- main processesing system of information
- parts of PNS
- somatic, autonomic
- parts of CNS
- brain and spinal cord
- afferent neurons
- sends messages to the brain
- efferent neurons
- messages from brain to spinal cord
- neuron
- single cell and the building block of the nervous system
- parts of a neuron
- soma, dendrites, axon
- function of dendrites
- receive signals and carry them to cell body, sends them to axon
- 3 characteristics of neurons
- dont grow back; damage is permanent; threshold of excitation
- threshold of excitation
- neurons fire when dendrites are stimulated; then depolarized; positively charged particles pushed outside neuron; neuron returns to its initial resting state
- action potential of neurons
- neuron is depolarized: neuron is stimulated or resting state is disturbed
- neurotransmitters
- chemical substance in axon
- types of neurotransmitters
- Acetycholine; Norepinephrine; Seratonin; Endorphins; Dopamine
- somatic nervous system
- respons to external senses (sight, taste, hearing..)
- autonomic nervous system
- controls vital and automatic activities (heart rate, blood pressure, internal organs)
- importance of somatic
- processes information; carries info from sense organs to the brain (what causes us to see an car coming and move)
- parasympathetic nervous system
- calms things down, moves heartbeat to normal after emergency
- 3 parts of the brain
- hindbrain, midbrain, forebrain
- hindbrain
- holds the cerebellum, medulla, the pons; interprets signals and cause the body to immediately act
- forebrain
- largest, most complicated part of the brain
- higher thinking process
- takes place in forebrain;
- thalamus
- sensory information
- hypothalamus
- motivation, emotion; regulates body temp
- RAS
- Reticulating Activating System
- Limbic System (parts)
- Thalamus; Hypothalamusl; Amygdala; Hippocampus
- Pancreas
- produces insulin and glucogen; controls sugar metabolism
- Thymus Gland
- behind breastbone; important to immune system
- Testes
- produce sperm and testosterone
- Ovaries
- produce estrogen and progesterone