Muscle Review 1

The contracting unit of a muscle cell is called ______?

• Sarcoplasm

• Sarcolemma

• Sarcomere

• Myofibril

The thick myofilament of a sarcomere is called_______?

• Actin

• Myosin

• Myofibril

• Myofilament

The sarcoplasmic reticulum releases this ion, ______, which binds to troponin causing it to move so that myosin binding sites can be exposed.

• Creatine

• Iron

• ATP

• Calcium

What is the connective tissue that surrounds / ensheathes the entire muscle?

• Epimysium

• Endomysium

• Perimysium

• Fascicle

A muscle cell is called ____?

• Sarcomere

• Muscle Fiber

• Fascicle

• Actin

This neurotransmitter must be released by an axon to innervate your muscle cells.

• Synaptic Cleft

• Axon terminals

• Synaptic Vesicles

• Acetylcholine

The nerve releases a chemical called a

• neurotransmitter

• neuron

• myofibril

• cell

Smooth muscle is voluntary

• true

• false

Smooth muscle is located where?

• heart

• bones

• toes

• internal organs

Where is cardiac muscle located?

• lungs

• heart

• liver

• stomach