are the major ones. III. Central Nervous System: and Spinal Cord A. The Spinal Cord 1. The has two main functions. spinal cord a. It is the center for many reflex actions. b. It provides the means of communication between the brain and the spinal nerves. 2. The spinal cord is composed of and gray matter. B. The Brain 1. The cerebrum, also called the telencephalon, is the largest part of the brain in humans. 2. The cerebral cortex contains motor, sensory, and association areas. The human hand takes up a large proportion of the primary motor area. Sensory information from the skin and skeletal muscles arrives at a primary somatosensory area. The in the occipital lobes. primary visual area The in the temporal lobe receives information from our primary auditory area ears. 3. Basal Nuclei 1) Aside from the tracts, there are masses of gray matter located deep within the white matter. 2) These basal nuclei integrate motor commands; malfunctions cause Huntingdon and Parkinson disease. 4. The Diencephalon: contains the and hypothalamus thalamus. 5. The Brain Stem contains the medulla oblongata, pons, and midbrain. It contains vital centers for regulating heartbeat, breathing, and vasoconstriction. IV. Peripheral Nervous System A. Somatic System B. The Reflex Arc C. Autonomic System Critical Thinking What keeps a nerve impulse from flowing in a neuron and across a Question 1. “backward” synapse? Question 2. How can a person be declared dead” when he/she is still breathing? “brain Question 3. Why is it difficult to diagnose the cause of an inability to speak?
are the major ones. III. Central Nervous System: and Spinal Cord A. The Spinal Cord 1. The spinal cord has two main functions. a. It is the center for many reflex actions. b. It provides the means of communication between the brain and the spinal nerves. 2. The spinal cord is composed of and gray matter. B. The Brain 1. The cerebrum, also called the telencephalon, is the largest part of the brain in humans. 2. The cerebral cortex contains motor, sensory, and association areas. The human hand takes up a large proportion of the primary motor area. Sensory information from the skin and skeletal muscles arrives at a primary somatosensory area. The primary visual area in the occipital lobes. The primary auditory area in the temporal lobe receives information from our ears. 3. Basal Nuclei 1) Aside from the tracts, there are masses of gray matter located deep within the white matter. 2) These basal nuclei integrate motor commands; malfunctions cause Huntingdon and Parkinson disease. 4. The Diencephalon: contains the hypothalamus and thalamus. 5. The Brain Stem contains the medulla oblongata, pons, and midbrain. It contains vital centers for regulating heartbeat, breathing, and vasoconstriction. IV. Peripheral Nervous System A. Somatic System B. The Reflex Arc C. Autonomic System Critical Thinking Question 1. What keeps a nerve impulse from flowing “backward” in a neuron and across a synapse? Question 2. How can a person be declared “brain dead” when he/she is still breathing? Question 3. Why is it difficult to diagnose the cause of an inability to speak?
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