When you participate in explosive sports that require you to expel a lot of energy in short amounts of time, you are not getting enough oxygen in your system. These sports include sprinting, football, weightlifting, and many more. If you are participating in these sports, which of the following sources of ATP would you primarily be relying on? Please select all that apply.

Which of the following ions contributes to action potentials in skeletal muscles? Please select all that apply.

You are entering off-season training for hockey. During your off-season training, you are performing exercises for your quadri-ceps muscle that force the muscle to contract quickly, for a short period. This way of training will fatigue the muscle quickly but will give you the most power. What type of muscle fiber are you training your quadriceps muscle to be?

Which of the following wraps around a fascicle?

A calcium ion is inside the T-tubule. When the T-tubule is stimulated, where would the calcium ion go next?

Which of the following make up a thick filament?

Which of the following would you expect to happen if the motor end plate was desensitized? Please select all that apply.

Which of the following is not a muscle tissue type?

Which of the following do you expect to occur when smooth muscle tissues contract?

Define excitability:

Describe the microscopic features of smooth muscle tissues. Please select all that apply.

You are playing volleyball and you jump up as high as you can to make a block. In order to do so, your gastrocnemius has

to shorten so it can propel the load of your body upward against gravity. What kind of contractions does your gastrocnemius

undergo? Please select all that apply.

You are trying to lift a heavy box onto the top shelf of your closet. In order to do so, you contract your deltoid muscles. When you have your arms by your side, the deltoid muscles are the longest. When you have your arms straight over your head, the deltoid muscles are the shortest. Which position will generate the most force so you can lift the box onto the top shelf of your closet? Please select all that apply.

You are studying a myogram when you notice that there is no relaxation phase after the contraction phase. Which of the following are you observing?

Which of the following motor units are recruited first during a contraction?

Describe the appearance of a contracted muscle cell. Please select all that apply.

Which of the following microfilaments is responsible for pulling the other microfilament during a contraction?

Where can you find troponin?

The extracellular matrix has a net charge of 250 mV. The cytoplasm in the cell has a net charge of 170 mV. What is the membrane potential?

Describe the appearance of a cardiac muscle fiber. Please select all that apply.

Which of the following controls cardiac muscle contractions? Please select all that apply.

Identify the location where you would find smooth muscle fibers. Please select all that apply.

Which of the following properties is shared among all

muscle tissues?

Where would you expect to find smooth muscles?

Which of the following characteristics are found in the

cells of all muscle tissue types?

Define a fascicle.

Select the order of connective tissue layers from most

superficial to deep.

Which of the following organelles in a skeletal muscle

fiber stores calcium ions for use in skeletal muscle

contraction?

Define a sarcomere.

Which of the following regions shortens when a

sarcomere contracts? Please select all that apply.

What is the pathway of an electrical impulse to contract

muscle tissues?

The influx of

ion into the cell leads to an action

potential.

Which of the following is true of the sliding filament

model of skeletal muscle contraction? Select all that

apply

Predict what would happen due to decreased or damaged

acetylcholine receptors. Please select all that apply.

After a skeletal muscle fiber has finished contracting.

several mechanisms cause it to relax. Treatment for

a patient with myasthenia gravis involves increasing

muscle contraction and decreasing the normal relaxation

process, so that the patient has less muscle weakness.

Which of the following types of treatments could

potentially help the patient? Please select all that apply.

Athletes that require energy for a long period of time, like

soccer players or marathon runners, will require large

amounts of ATP. Which of the following systems would

they rely on the most?

When a person finishes an exercise session, the

breathing rate remains elevated for a few minutes. How

does this help the skeletal muscles recover from the

exercise and prepare for the next exercise session?

Explain how ATP deficiency can contribute to muscle

fatigue.

The gastrocnemius is a muscle in your calf. You use this

muscle to stand and walk. An average person stands

2-4 hours per day and takes 4,000 steps per day.

Describe the anatomical features would you expect to

find in this muscle fiber.