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13 Cards in this Set
- Front
- Back
- 3rd side (hint)
True/False: Alpha cells of the pancreas secrete insulin when blood glucose levels are high
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false
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A person has a tumor in the anterior pituitary causing a decrease in ACTH secretion. Which of the following correctly describes changes in the plasma levels of hormones?
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increased CRH, decreased ACTH, and decreased cortisol
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The receptors for water-soluble hormones are located primarily _____.
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on the surface of the target cell
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What events could be a result of damage to they hypophyseal portal system?
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decreased secretion of TSH
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Cyclic-AMP functions as a second messenger to:
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activate protein kinase A
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The striations in skeletal muscle correspond with actual molecule structures. Which of the following is the I band?
a. A band where only actin molecules are found b. A band where only myosin molecules are found c. An attachment point for actin molecules d. A band with thick filaments but no thin filaments e. An attachment point for myosin molecules |
a. A band where only actin molecules are found
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FSH in males stimulates:
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production of sperm
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Increases in the amount of cytoplasmic calcium required to initiate a muscle contraction are mediated by the coupling between a ____ on the T tubule and a _____ on the membrane of the sarcoplasmic reticulum.
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DHP receptor : calcium pump
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True/False: Sarcomeres shorten when thin filaments contract, causing the entire muscle to contract.
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false
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True/False: Each motor neuron supplies just one muscle fiber.
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false
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What would be the consequence of defective ADH receptors?
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dehydration
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True/False: Hyposecretion of TSH would result in an increase in body temperature, heart rate and respiratory rate.
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false
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Describe the physiological effects that calcitonin and PTH have on blood calcium levels (include the name of the organ that secretes each hormone). Is this a type of hormonal, humoral or neural stimuli?
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humoral stimuli
Calcitonin Organ secreted from: parafollicular cells thyroid gland Affect on blood calcium levels: increased blood calcium triggers calcitonin to secrete causing a decrease of blood calcium levels |
PTH
Organ secreted from: parathyroid gland Affect on blood calcium levels: decreased blood calcium levels stimulates release of PTH to increase blood calcium levels |