Portage Learning: A&P 1 Module 5
Questions and Answers | Latest Version
| 2025/2026 | Correct & Verified
What type of muscle tissue is striated and voluntary?
✔✔ Skeletal muscle
What type of muscle tissue is involuntary and found in the walls of hollow organs?
✔✔ Smooth muscle
What type of muscle tissue is striated and involuntary?
✔✔ Cardiac muscle
What connective tissue layer surrounds a single muscle fiber?
✔✔ Endomysium
What connective tissue surrounds a fascicle of muscle fibers?
✔✔ Perimysium
1
,What is the outermost connective tissue layer around a whole muscle?
✔✔ Epimysium
What structure connects muscle to bone?
✔✔ Tendon
What structure connects bone to bone?
✔✔ Ligament
What is the contractile unit of a muscle fiber?
✔✔ Sarcomere
What protein forms the thick filaments in muscle?
✔✔ Myosin
What protein forms the thin filaments in muscle?
✔✔ Actin
2
,What mineral is essential for muscle contraction?
✔✔ Calcium
What organelle stores calcium in muscle cells?
✔✔ Sarcoplasmic reticulum
What molecule provides immediate energy for muscle contraction?
✔✔ ATP
What molecule stores oxygen in muscle tissue?
✔✔ Myoglobin
What is the name of the neurotransmitter that stimulates muscle contraction?
✔✔ Acetylcholine
What enzyme breaks down acetylcholine in the synaptic cleft?
✔✔ Acetylcholinesterase
3
, What is the gap between a neuron and muscle fiber called?
✔✔ Synaptic cleft
What structure on the muscle fiber receives the nerve signal?
✔✔ Motor end plate
What type of neuron stimulates muscle contraction?
✔✔ Motor neuron
What is a single neuron and all the muscle fibers it controls called?
✔✔ Motor unit
What is the response of a single muscle fiber to a single stimulus?
✔✔ Muscle twitch
What phase of a muscle twitch involves no visible contraction yet?
✔✔ Latent period
4
Questions and Answers | Latest Version
| 2025/2026 | Correct & Verified
What type of muscle tissue is striated and voluntary?
✔✔ Skeletal muscle
What type of muscle tissue is involuntary and found in the walls of hollow organs?
✔✔ Smooth muscle
What type of muscle tissue is striated and involuntary?
✔✔ Cardiac muscle
What connective tissue layer surrounds a single muscle fiber?
✔✔ Endomysium
What connective tissue surrounds a fascicle of muscle fibers?
✔✔ Perimysium
1
,What is the outermost connective tissue layer around a whole muscle?
✔✔ Epimysium
What structure connects muscle to bone?
✔✔ Tendon
What structure connects bone to bone?
✔✔ Ligament
What is the contractile unit of a muscle fiber?
✔✔ Sarcomere
What protein forms the thick filaments in muscle?
✔✔ Myosin
What protein forms the thin filaments in muscle?
✔✔ Actin
2
,What mineral is essential for muscle contraction?
✔✔ Calcium
What organelle stores calcium in muscle cells?
✔✔ Sarcoplasmic reticulum
What molecule provides immediate energy for muscle contraction?
✔✔ ATP
What molecule stores oxygen in muscle tissue?
✔✔ Myoglobin
What is the name of the neurotransmitter that stimulates muscle contraction?
✔✔ Acetylcholine
What enzyme breaks down acetylcholine in the synaptic cleft?
✔✔ Acetylcholinesterase
3
, What is the gap between a neuron and muscle fiber called?
✔✔ Synaptic cleft
What structure on the muscle fiber receives the nerve signal?
✔✔ Motor end plate
What type of neuron stimulates muscle contraction?
✔✔ Motor neuron
What is a single neuron and all the muscle fibers it controls called?
✔✔ Motor unit
What is the response of a single muscle fiber to a single stimulus?
✔✔ Muscle twitch
What phase of a muscle twitch involves no visible contraction yet?
✔✔ Latent period
4
