The myofibril is surrounded by a mesh looking storage tank of calcium called the

The overlapping and non-overlapping filaments in skeletal muscle give it this appearance?

One contractile unit of muscle

The muscle impulse travels across the muscle sarcolemma and down the

When the motor neuron sends an impulse down to the nerve terminal, this neurotransmitter is released.

This region consists of the nerve terminal, synaptic cleft and motor end plate.

What is the next step: When ACh crosses the synaptic cleft, it lands on an ACh receptor that opens Na channels and creates a

When the muscle impulse travels down the t-tubules these are released from the sarcoplasmic reticulum

When calcium enters the sarcoplasm, they land on the actin complex and cause these to be revealed

In order for the muscle to contract, the myosin head must be charged with this molecule

What is the crossbridge formation?

The first source of energy for muscle contraction is stored ATP, followed by ______________ and finally cellular respiration

This occurs with strenuous exercise that results in muscle fatigue

Oxygen debt results in the inability for sugar to enter the mitochondria, so instead, it stays in the cytoplasm and ferments into this

Lack of ATP and extracellular fluid imbalances lead to uncontrolled muscle fiber stimulation

The minimum strength of stimulus required to generate an impulse in a muscle fiber

This image is showing a

When a muscle fiber contracts, it does so completely and never partially, this is called

This image is demonstrating

A motor neuron and the muscle fibers it controls is called a

You can lift heavier items by activating more motor units. This is known as

When summation and recruitment work together, the result is increased strength

The continuous state of sustained contraction of a few motor units at at time within a muscle to maintain posture

This type of muscle cell is branched

This muscle cell has actin and myosin filaments randomly ordered so there are no striations

This muscle fiber is the only one that is voluntarily controlled

Smooth muscles are controlled by ACh, Norepinephrine and these

Why are cardiac muscle fibers self-exciting?

A muscle that is the prime mover

What is the correct relationship between origins and insertions of muscles?

Muscles have three nerves controlling them: Alpha nerves start muscle contraction, gamma nerves make it more accurate, and 1a nerves detect muscle

How many types of muscle fibers are in each skeletal muscle?

a continuous state of sustained contraction of a few motor units at a time within a muscle is called