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| The sarcoplasmic reticulum stores ions that are necessary for skeletal muscle contractions. Which of the following ions does it store? |
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Definition
| Which functions in the attachment of muscle to bone? |
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| The electrical impulse transmitted by a neuron is caused by the movement of _____. |
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| Why does a person continue to breathe heavily after prolonged activity? |
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| If the muscles are not used they will atrophy |
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Definition
| Someone who has broken an arm and has had a cast on it for months will notice a distinct shrinking of the arm once the cast is removed. Why does this happen? |
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| This type of hormone characteristically requires a second messenger. |
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| Cancer cells often fail to respond to certain hormones because they lack these cell membrane features important in binding with that specific hormone. |
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| drophilic compounds cannot cross the plasma membrane |
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Definition
| Hormones that are hydrophilic in nature interact with receptors at the cell surface. The reason for this is_______. |
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| Which of the following carry impulses toward the nerve cell body? |
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| Choose the term that describes muscles that oppose one another. |
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| are able to recognize the hormones using receptor proteins |
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Definition
| Hormones have direct effects on cells that _____. |
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| What are specialized membrane proteins that actively transport sodium and potassium ions across the plasma membrane? |
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| The receptor for a steroid hormone can be found ________. |
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| One class of hormones are the lipid-insoluble or protein-based hormones made up of __________ sub-units. |
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| ATP is used as an energy source for nearly all cellular metabolic processes. Which of the following macromolecules, if available, is used preferentially for ATP synthesis? |
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