Central nervous system Brain Spinal cord Peripheral Nervous
Central nervous system Brain Spinal cord Peripheral Nervous system – messages via spinal and cranial nerves Motor nerves Sensory nerves - from CNS to effectors carry sensory info to brain and spinal cord somatic sensory nerves - FROM skin, muslces, joints, special senses visceral sensory nerves - FROM body organs Autonomic motor nerves (controls body function) To smooth muscle, cardiac muscle, organs, glands involuntary Somatic motor nerves (controls movement) TO skin, skeletal muscles, tendons voluntary Sympathetic division "Fight or flight" Parasympathetic division "rest and digest" "normal state"
Resting Potential
A c t i o n P o t e n t i a l
Action Potential
Propagation of Action Potential
lateral ventricle third ventricle pineal gland Cerebrum skull meninges corpus callosum Diencephalon thalamus (surrounds the third ventricle) hypothalamus pituitary gland Brain stem midbrain pons medulla oblongata Cerebellum fourth ventricle spinal cord b. Cerebral hemispheres
Somatic Nervous system
Autonomic Nervous system
Somatic Motor Pathway Autonomic motor pathways Sympathetic motor pathway Parasympathetic motor involuntary # of neurons/message 1 2 (preganglionic shorter than post) 2 (preganglionic longer than post) Loctn of motor fiber Most cranial nerves and all spinal nerves Thoracic-lumbar spinal Cranial and sacral nerves spinal nerves Neurotransmitter acetylcholine Norepinephrine (NE) Acetylcholine (Ach) effectors Skeletal muscle, skin, tendons Smooth & cardiac muscle, glands, & organs Control Vol/invol
The 46 chromosomes of a male
OOGENESIS
3 kinds of RNA help with information transfer for protein synthesis
The Genetic Code anticodon - t. RNA Translated Codon - m. RNA Transcribed Triplet - DNA
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