What is the correct order of events in muscle contraction?
BIOL 2301 Final Exam Review

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Biology
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University
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Hard
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1.
FLASHCARD QUESTION
Front
Back
1. Motor neuron AP 2. Neurotransmitter release 3. Muscle cell AP 4. Release of Ca from SR 5. ATP-driven power stroke 6. Sliding of myofilaments
2.
FLASHCARD QUESTION
Front
What is the pattern used in endochondral ossification for forming long bones?
Back
Hyaline cartilage
3.
FLASHCARD QUESTION
Front
What describes secondary active transport across a membrane?
Back
Glucose moving across the membrane against its concentration gradient using the movement of sodium ions moving along their gradient.
4.
FLASHCARD QUESTION
Front
What type of feedback mechanism is illustrated by low thyroid hormone levels stimulating the thyroid gland to secrete more hormone?
Back
Negative feedback
5.
FLASHCARD QUESTION
Front
Which of the following is NOT a function of the skin?
Back
Gives the body its overall shape, loss of this function can be seen with the drooping of skin with age.
6.
FLASHCARD QUESTION
Front
Define muscle cell action potential (AP).
Back
A rapid change in membrane potential that occurs when a muscle cell is stimulated, leading to muscle contraction.
7.
FLASHCARD QUESTION
Front
What is the role of calcium ions (Ca) in muscle contraction?
Back
Calcium ions are released from the sarcoplasmic reticulum and bind to troponin, allowing myosin to bind to actin and initiate contraction.
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