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