Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Apologia Human Body
Module 5
| Question | Answer |
|---|---|
| How can you tell if a sample of muscle tissue is the complete muscle or part of the muscle? | If there is a wrapping around all if the fascicles, it is the epimysium, meaning it is complete. |
| ATP molecules are bond to the myosin heads in a sarcomere and are breaking down. This is the ___________ stroke. | return |
| If the Ca2+ concentration in the sarcoplasmic reticulum suddenly increased dramatically, the muscle is ____________________ its contraction. | finishing |
| When the sarcoplasmic reticulum releases Ca2+ ions in response to the action potential, the ions move through the membrane of the sarcoplasmic reticulum via ____________________. | diffusion |
| when the sarcoplasmic reticulum releases Ca2+ ions in response the the action potential, the ions move through the membrane os the sarcoplasmic reticulum and this is _______________ transport. | passive |
| If someone is working out and gets so fatigued that they run out of energy and their muscle fibers can no longer produce ATP, what will happen in his sarcomeres? | Muscle cramp/stiffness |
| Two muscle fibers lie side by side and contract and relax differently, so they are a part of ___________________ motor units | different |
| A muscle contracts, but only a small percentage of its motor units have been recruited. What kind of stimulus is being applied? | Submaximal stimulus |
| The cells in a person's leg muscles all have a large amount of lactic acid in them. There is a ___________ amount of creatine phosphate in those cells. | small |
| The cells in a person's leg muscles all have a large amount of lactic acid in them. This person is resting, and is most likely breathing __________________. | heavily |
| Major characteristics of muscle tissue | contractility, excitability, extensibility, elasticity |
| Types of muscle tissue | skeletal, smooth, cardiac |
| Skeletal muscle cells have _____________ nuclei. | many |
| Skeletal muscle cells are at the _________ of the cell. | edge |
| When a muscle fiber contracts, the distance between the Z discs, the length of the H zone, and the length of the I band | decreases |
| When a muscle fiber contracts, the length of the A band, the myosin myofilament, and the actin myofilament ____________________ . | stays the same |
| The concentration of calcium ions in the sarcoplasmic reticulum is decreasing, so the muscle fiber is ____________ contracting. | starting |
| The myosin heads of a sarcomere have just received a boost of energy, meaning the ___________________ is about the happen. | return stroke |
| A myosin head has ADP attached to it but not an individual phosphate, so the __________________ is about to happen next. | power stroke |
| All of the cells in the same motor unit will ___________ identically at the same time. | contract |
| The function of ___________________ is to inactivate the ACh after it has interacted with the postsynaptic membrane. | acetylcholinesterase |
| ATP provides the ________________________ with energy for the active transport of calcium ions into itself, which is critical for muscle relaxation | sarcoplasmic reticulum |
| ATP attaches to the myosin heads, making them release the active sites and giving them ____________ for the return stroke. | energy |
| A muscle is stiff and can neither contract or relax. The _______________ must be gripping the active sites and not letting go, due to a lack of ATP in the sarcomre. | myosin heads |
| When a motor neuron is recruited, it is responding to a stimulus by sending __________________ down its axon. This stimulates contraction of the muscle fiber in its control. | action potentials |
| When a muscle cell relaxes, the myosin heads let go of the active sites, making it very easy for the muscle to stretch out, but that does not ___________________ happen. | automatically |
| All of the motor units in a muscle have been recruited. If more stimulus is applied, this is called ______________. | supramaximal stimulus |
| A muscle is expending energy faster than it can be replaced by aerobic respiration. There is also no creatine phosphate left. the only option for energy left is _____________________________. | anaerobic respiration |
| Anaerobic respiration leads to a build up of this. | Lactic acid |
| When breathing hard after exercising, this fuels aerobic respiration and provides energy for the muscle fiber to convert lactic acid to _________________. | glucose |
| Aerobic respiration after exercise provides energy for the muscle fiber to remake _____________________ for an energy reserve. | creatine phosphate |
| Sarcomere | The repeating unit of a myofibril |
| Synapse | The interface between a nerve cell and another cell |
| Neurotransmitter | A chemical released by a neuron. This chemical travels across the synaptic cleft, allowing the neuron to communicate with another cell. |
| Motor unit | One motor neuron and all the muscle fibers it innervates |
| All-or-none law of skeletal muscle contraction | An individual muscle fiber contracts with equal force in response to each action potential |
| Muscle tone | The state of partial contraction in a muscle, even when the muscle is not being used |
Created by:
q
Popular Anatomy sets