THESE ARE SHORT ANSWER QUESTIONS AND NOT AN ESSAY QUESTION 1: For each of the following types of receptors provide a brief description of the stimulus it responds to (in your own words) and identify if it is found in general senses, special senses, or both. Chemoreceptors Nociceptors Mechanoreceptors Thermoreceptors and Photoreceptors

QUESTION 2:

Finish the following statements in the description of synaptic transmission.

Interneuronal communication occurs via _______________ messengers that are released from the presynaptic neuron. These are called _____________ and they act by binding to receptors on the postsynaptic neuron. This binding opens ____________ channels, which can either hyperpolarize or depolarize the postsynaptic neuron membrane. This action is kept relatively short by either the decomposition or the ______________ of neurotransmitters from the synaptic cleft. QUESTION 3:

Identify whether the following events would be classified as excitatory or inhibitory to a neuron.

A. Potassium ions diffusing out of the cell_______

B. Hyperpolarization of the cell membrane within the trigger zone________ –

C. Sodium ions diffusing into the cell_________

D. Depolarization of the cell membrane within the trigger zone______.

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