Questions & Expertly Verified
Quiz_________________?
A motor signal is a signal that is sent from a muscle to the central nervous system. -
Answer✅
false, that is sensory input
Quiz_________________?
A person sustained a back injury to the muscle group closest to the spine. What muscle
group was injured? -
Answer✅
Spinalis
Quiz_________________?
Acetylcholine is what type of substance? -
Answer✅
neurotransmitter
Quiz_________________?
1
, cardiac and smooth muscle tissue are both under involuntary control -
Answer✅
true
Quiz_________________?
Contraction of (muscle) results in hip flexion -
Answer✅
iliacus
Quiz_________________?
Describe how acetylcholine, sodium ions and calcium ions work together to enable a muscle
contraction. -
Answer✅
Acetylcholine is released from a motor nerve at the neuromuscular junction. Once there, it
binds with receptors on the muscle fiber that cause sodium ions to be released inside the
cell. This causes an action potential which reaches the sarcoplasmic recticulum. The sodium
ions cause calcium ions to be released from to sarcoplasmic recticulum. The calcium ions
cause the muscle contraction. The myosin heads grab the actin and pull them along causing a
contraction.
Quiz_________________?
During a muscle contraction which protein myofilament contains cross-bridges? -
Answer✅
myosin
Quiz_________________?
2
Quiz_________________?
A motor signal is a signal that is sent from a muscle to the central nervous system. -
Answer✅
false, that is sensory input
Quiz_________________?
A person sustained a back injury to the muscle group closest to the spine. What muscle
group was injured? -
Answer✅
Spinalis
Quiz_________________?
Acetylcholine is what type of substance? -
Answer✅
neurotransmitter
Quiz_________________?
1
, cardiac and smooth muscle tissue are both under involuntary control -
Answer✅
true
Quiz_________________?
Contraction of (muscle) results in hip flexion -
Answer✅
iliacus
Quiz_________________?
Describe how acetylcholine, sodium ions and calcium ions work together to enable a muscle
contraction. -
Answer✅
Acetylcholine is released from a motor nerve at the neuromuscular junction. Once there, it
binds with receptors on the muscle fiber that cause sodium ions to be released inside the
cell. This causes an action potential which reaches the sarcoplasmic recticulum. The sodium
ions cause calcium ions to be released from to sarcoplasmic recticulum. The calcium ions
cause the muscle contraction. The myosin heads grab the actin and pull them along causing a
contraction.
Quiz_________________?
During a muscle contraction which protein myofilament contains cross-bridges? -
Answer✅
myosin
Quiz_________________?
2
