Presentation on theme: "1. Contrast the functions of B cells and T cells. 2. What are memory cells? 3. How do vaccines work? 4. How does HIV affect the immune system?"— Presentation transcript:
1. Contrast the functions of B cells and T cells. 2. What are memory cells? 3. How do vaccines work? 4. How does HIV affect the immune system?
1. Draw and label the parts of a neuron. 2. Describe saltatory conduction. 3. Explain how a nerve impulse is transmitted across a neuron.
1. What happens at the synapse? 2. Choose 1 neurotransmitter. Describe its action. 3. What is the role of the following structures in the human brain? a) Brainstem b) Cerebellum c) Cerebrum d) Corpus callosum
The anatomy of a neuron. The mechanisms of impulse transmission in a neuron. The process that leads to release of neurotransmitters, and what happens at the synapse. How the vertebrate brain integrates information, which leads to an appropriate response. Different regions of the brain have different functions.
Central nervous system (CNS) = brain + spinal cord Peripheral nervous system (PNS) = nerves throughout body Sensory receptors: collect info Sensory neurons: body CNS Motor neurons: CNS body (muscles, glands) Interneurons: connect sensory & motor neurons Nerves = bundles of neurons Contains motor neurons +/or sensory neurons
Chemicals released from vesicles by exocytosis into synaptic cleft Diffuse across synapse Bind to receptors on neurons, muscle cells, or gland cells Broken down by enzymes or taken back up into surrounding cells Types of neurotransmitters: Excitatory: speed up impulses by causing depolarization of postsynaptic membrane Inhibitory: slow impulses by causing hyperpolarization of postsynaptic membrane
Mouse Party Neural Data Matrix: Drug: Neurotransmitter(s) Involved Action of Drug: Summary Illustration
Simple, automatic response to a stimulus Conscious thought not required Reflex arc: 1. Stimulus detected by receptor 2. Sensory neuron 3. Interneuron (spinal cord or brain stem) 4. Motor neuron 5. Response by effector organ (muscles, glands)