WCU PHYS 261 Week 6 Muscles
questions with complete solutions
What are skeletal muscles? - correct answer ✔✔ Striated muscles that control voluntary body
movement that respond to somatic motor neurons
What are cardiac muscles? - correct answer ✔✔ Striated muscles that move blood through the
circulatory system under involuntary control
What does cardiac muscle respond to? - correct answer ✔✔ Autonomic innervation
Spontaneous contraction
Modulated by endocrine
What are smooth muscles? - correct answer ✔✔ Primary involuntary muscle of internal organs
and tubes that influence movement of material in and out of the body
What does smooth muscle respond to? - correct answer ✔✔ Autonomic innervation
Spontaneous contraction
Modulated by endocrine
Where is muscle usually attached to? - correct answer ✔✔ Bones by tendons
What is origin? - correct answer ✔✔ Closest to the trunk or to a more stationary bone
What is insertion? - correct answer ✔✔ Distal or more mobile attachment
, What is flexion? - correct answer ✔✔ Brings bones together
What is extension? - correct answer ✔✔ Moves bones away
What do flexor-extensor pairs form? - correct answer ✔✔ Antagonistic muscle groups
What is the sarcolemma? - correct answer ✔✔ Cell membrane
What is the sarcoplasm? - correct answer ✔✔ Cytoplasm
What is the sarcoplasmic reticulum? - correct answer ✔✔ Endoplasmic reticulum
What is terminal cisternae? - correct answer ✔✔ Enlarged ends of longitudinal tubes that
concentrates and sequesters calcium
What are sarcomere? - correct answer ✔✔ Contractile components of a muscle cell
What are t-tubules? - correct answer ✔✔ Tunnel-like structures that run deep into the cell that
allow action potentials to penetrate nearer to internal structures
What is a triad? - correct answer ✔✔ T-tubule plus 2 terminal cisternae
What are glycogen granules? - correct answer ✔✔ little lumps of glycogen
What does the mitochondria do for muscles? - correct answer ✔✔ supplies energy, and gives
fuel to sustain endurance
questions with complete solutions
What are skeletal muscles? - correct answer ✔✔ Striated muscles that control voluntary body
movement that respond to somatic motor neurons
What are cardiac muscles? - correct answer ✔✔ Striated muscles that move blood through the
circulatory system under involuntary control
What does cardiac muscle respond to? - correct answer ✔✔ Autonomic innervation
Spontaneous contraction
Modulated by endocrine
What are smooth muscles? - correct answer ✔✔ Primary involuntary muscle of internal organs
and tubes that influence movement of material in and out of the body
What does smooth muscle respond to? - correct answer ✔✔ Autonomic innervation
Spontaneous contraction
Modulated by endocrine
Where is muscle usually attached to? - correct answer ✔✔ Bones by tendons
What is origin? - correct answer ✔✔ Closest to the trunk or to a more stationary bone
What is insertion? - correct answer ✔✔ Distal or more mobile attachment
, What is flexion? - correct answer ✔✔ Brings bones together
What is extension? - correct answer ✔✔ Moves bones away
What do flexor-extensor pairs form? - correct answer ✔✔ Antagonistic muscle groups
What is the sarcolemma? - correct answer ✔✔ Cell membrane
What is the sarcoplasm? - correct answer ✔✔ Cytoplasm
What is the sarcoplasmic reticulum? - correct answer ✔✔ Endoplasmic reticulum
What is terminal cisternae? - correct answer ✔✔ Enlarged ends of longitudinal tubes that
concentrates and sequesters calcium
What are sarcomere? - correct answer ✔✔ Contractile components of a muscle cell
What are t-tubules? - correct answer ✔✔ Tunnel-like structures that run deep into the cell that
allow action potentials to penetrate nearer to internal structures
What is a triad? - correct answer ✔✔ T-tubule plus 2 terminal cisternae
What are glycogen granules? - correct answer ✔✔ little lumps of glycogen
What does the mitochondria do for muscles? - correct answer ✔✔ supplies energy, and gives
fuel to sustain endurance
