A & P Muscular System-Physiology

Striated involuntary muscle tissue is classified as ________ muscle.

• Skeletal

• Cardiac

• smooth

• Either smooth or skeletal

Muscle tissue has the ability to shorten when adequately stimulated, a characteristic known as ________.

• Contractibility

• Elasticity

• extensibility

• Irritability

Striated voluntary muscle is found where?

• Dense regular

• Cardiac

• smooth

• Skeletal

Smooth muscle cells are _____

• Involuntary

• Multinucleate

• branched

• Striated

A sarcomere is _______

• The nonfunctional unit of skeletal muscle

• The contractile unit between two Z discs

• the wavy lines on a muscle cell

• a compartment in a microfilament

10. Acetylcholine is:

• a neurotransmitter

• a hormone

• an enzyme

• a carbohydrate

The region where a motor neuron comes in close contact with a single muscle cell is called the _______________________________.

• neuromuscular junction

• axon terminal

• synaptic cleft

• motor end plate

A bundle of muscle fibers is called a _____________________.

• fascicle

• sarcomere

• myofibril

• tendon

Tags

NGSS.HS-LS1-2

Perimysium covers what part of the muscle?

• Muscle fascicle

• Muscle fiber

• Epimysium

• Tendon

Calcium ions are necessary for skeletal muscle contraction because:

• they bind to troponin, allowing actin and myosin interaction

• they provide energy for muscle contraction

• they break down acetylcholine in the synaptic cleft

• they inhibit the release of neurotransmitters