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Physiology 2420
Question | Answer |
---|---|
What precursor molecule are eicosanoids synthesized from? | Arachnoid Acid |
What precursor molecule are steroid hormones synthesized from? | cholesterol |
Define temporal summation | the addition of graded potentials generated at a particular site that occurs when stimulated at a high frequency |
Name two characteristics of an electrical (as opposed to chemical) synapse. | bi-directional electrical occurs in smooth muscle |
Which enzyme breaks down acetylcholine into acetate and choline? | ACHE |
Name two characteristics of an EPSP. | -excitatory (brings closer to threshold) -caused by sodium influx |
What hormone is released from the thymus? | thymosin |
What is an autocrine? | a cell that secretes a messenger that will bind to itself |
Name a disadvantage to gap junctions and a disadvantage to chemical messengers? | gap junctions - cells must be connected chemical messengers - tales longer to travel |
Name one tropic hormone released by the anterior pituitary. | TSH, prolactin, ACTH, GH, LH, FSH (Fig. 6.5) |
What is a secondary endocrine gland? Also give an example. | Stomach - peptin Secondary requires a primary gland to activate |
What type of ion channel helps establish the resting membrane potential and allows potassium to flow through? | leak-channel |
What channels are the most abundant type of voltage-gated channel within the axon terminal and are responsible for the release of neurotransmitter? | calcium-gated channel |
Name one classification of lipophobic messengers in chapter five. | Amine Acid |
What is the site of communication between two neurons called? | synapse |
Name two ions that can contribute to an IPSP. | chloride, potassium |
What is an agonist? | messenger that produces a response in a cell |