Muscle and Nerve Quiz Review

This is a neurotransmitter used to create a muscle impulse

• Acetylcholine
• Calcium Ions (Ca²⁺)
• Sodium Ions (Na⁺)
• Protein Channels

The organelle that contains actin and myosin.

• Tendon
• myofilament
• myofibril
• Fiber

Contractile unit of a muscle.

• sarcomere
• motor unit
• fascicle
• myofibril

What two chemicals are necessary for muscle contraction to occur?

• Niacin and Potassium
• Calcium and ATP
• Sodium and Potassium
• Ach and Potassium

Calcium:

• causes ATP binding to actin
• increases the action potential along the sarcolemma
• binds to proteins on myosin
• triggers the binding of myosin to actin

The energy needed to perform a muscle contraction comes directly from

• ATP
• Oxygen
• Glucose
• Calcium

Cellular respiration that occurs without oxygen present is called

• aerobic
• anaerobic
• isotonic
• isometric

Anaerobic respiration results in "oxygen debt" in the form of ________.

• ATP
• lactic acid
• pyruvic acid
• creatine

Isometric contractions result in muscle contraction with movement of the body/bone

• True
• False

Which of the following is a primary function of the nervous system?

• communication and command system of the body

• Senses changes in and around the body

• Responds to changes with some form of muscle contraction or gland secretion. ​

• All of these