Apologia Anatomy and Physiology mod 5 the muscular system | Baamboozle - Baamboozle

What kind of energy source do muscles take advantage of that requires oxygen and what kinds do not?

aerobic respiration is very efficient and requires oxygen, using creatine phosphate does not use oxygen, and anaerobic respiration does not require oxygen.

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Where is the first place muscles find energy when aerobic respiration can't keep up with demand?

Creatine phosphate, Creatine phosphate+ADP=creatine phosphate+ATP Only enough energy for 10-15 seconds of contraction

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What causes an oxygen debt?

This occurs when muscles are don't receive enough O2 for anerobic respiration to supply the energy needs. it relies on creatine phosphate and anerobic respirati

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What happens between the power stroke and the return stroke?

ATP binds to the myosin heads causing them to release the active sights on the actin. (setting the stage for a sequel)

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What does acetylcholinesterase do for the muscle?

Breaks down the neurotransmitter acetylcholine, preventing action potentials from reaching muscle. allowing the muscle to relax

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What is a motor unit?

motor unit: One motor neuron and all the muscle fibers it innervates.

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Explain step E

Return stroke:ATP breaks down to ADP and P which stays bound to myosin heads.Energy released, myosin heads powered up like a set mouse trap

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What does it mean when a motor neuron is recruited?

motor neuron is recruited: it is responding to a stimulus by sending action potentials down its axon.

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What gives us muscle tone?

Partial contraction of a muscle -When only some of the motor units are recruited

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Identify structures of the neuromuscular junction a, b, c, d and e

A presynaptic terminal, B mitochondria, C synaptic vesicle, D synaptic cleft, E postsynaptic membrane

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The sarcoplasmic reticulum uses active transport to put calcium back onto the organelles. Is this the beginning or end of the contraction?

End

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identify the parts of the sarcomere.

a: actin myofilament, b: myosin myofilament, c: H zone, d: A band, e: I band, f: z disk

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calcium ions are being actively transported into the sarcoplasmic reticulum. Is it the beginning or the ending of a contraction?

ending, it is resetting the calcium. (Active transport requires energy)

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