Portage A&P1 Module 6 Exam Questions
and Answers | Latest Version | 2025/2026
| Correct & Verified
What type of muscle contraction is controlled by pacemaker cells?
✔✔ Cardiac muscle contraction
What type of muscle tissue is attached to bones and allows voluntary movement?
✔✔ Skeletal muscle
What is the connective tissue that surrounds a single muscle fiber called?
✔✔ Endomysium
What is the bundle of muscle fibers wrapped together called?
✔✔ Fascicle
What is the name of the tough connective tissue that connects muscle to bone?
✔✔ Tendon
1
,What is the basic functional unit of a muscle fiber?
✔✔ Sarcomere
What two proteins slide past each other during muscle contraction?
✔✔ Actin and myosin
What ion is necessary to initiate muscle contraction?
✔✔ Calcium
What molecule provides immediate energy for muscle contraction?
✔✔ ATP
What is released by the sarcoplasmic reticulum to trigger muscle contraction?
✔✔ Calcium ions
What is the name of the neurotransmitter that stimulates skeletal muscle contraction?
✔✔ Acetylcholine
2
, What structure carries the action potential deep into the muscle fiber?
✔✔ T-tubule
What enzyme breaks down acetylcholine at the neuromuscular junction?
✔✔ Acetylcholinesterase
What type of respiration produces the most ATP in muscle cells?
✔✔ Aerobic respiration
What condition results from a lack of ATP in muscle fibers after death?
✔✔ Rigor mortis
What is the name of the junction where a motor neuron meets a muscle fiber?
✔✔ Neuromuscular junction
What part of the muscle fiber stores calcium?
✔✔ Sarcoplasmic reticulum
3
and Answers | Latest Version | 2025/2026
| Correct & Verified
What type of muscle contraction is controlled by pacemaker cells?
✔✔ Cardiac muscle contraction
What type of muscle tissue is attached to bones and allows voluntary movement?
✔✔ Skeletal muscle
What is the connective tissue that surrounds a single muscle fiber called?
✔✔ Endomysium
What is the bundle of muscle fibers wrapped together called?
✔✔ Fascicle
What is the name of the tough connective tissue that connects muscle to bone?
✔✔ Tendon
1
,What is the basic functional unit of a muscle fiber?
✔✔ Sarcomere
What two proteins slide past each other during muscle contraction?
✔✔ Actin and myosin
What ion is necessary to initiate muscle contraction?
✔✔ Calcium
What molecule provides immediate energy for muscle contraction?
✔✔ ATP
What is released by the sarcoplasmic reticulum to trigger muscle contraction?
✔✔ Calcium ions
What is the name of the neurotransmitter that stimulates skeletal muscle contraction?
✔✔ Acetylcholine
2
, What structure carries the action potential deep into the muscle fiber?
✔✔ T-tubule
What enzyme breaks down acetylcholine at the neuromuscular junction?
✔✔ Acetylcholinesterase
What type of respiration produces the most ATP in muscle cells?
✔✔ Aerobic respiration
What condition results from a lack of ATP in muscle fibers after death?
✔✔ Rigor mortis
What is the name of the junction where a motor neuron meets a muscle fiber?
✔✔ Neuromuscular junction
What part of the muscle fiber stores calcium?
✔✔ Sarcoplasmic reticulum
3
