Edexcel IAL Muscle Tissue Quiz

Which molecule provides the immediate source of energy for muscle contraction?

• ATP

• Glucose

• Glycogen

• Creatine phosphate

Which type of muscle contraction occurs when the muscle lengthens under tension?

• Isometric

• Isotonic

• Eccentric

• Concentric

Which protein forms thin filaments in a sarcomere?

• Actin

• Myosin

• Troponin

• Tropomyosin

Which type of muscle contraction occurs when the muscle generates tension but does not change in length?

• Isometric

• Isotonic

• Eccentric

• Concentric

Which type of muscle tissue is striated and under voluntary control?

• Skeletal muscle

• Cardiac muscle

• Smooth muscle

• Involuntary muscle

What is the term for the functional connection between a motor neuron and a muscle fiber?

• Synapse

• Myofibril

• Sarcomere

• Neuromuscular junction

Which molecule is responsible for breaking down acetylcholine at the neuromuscular junction?

• Acetylcholinesterase

• Creatine kinase

• Lactic acid

• Myoglobin

What is the functional unit of a skeletal muscle called?

• Sarcomere

• Myofibril

• Actin

• Myosin

What is the primary function of creatine phosphate in muscle cells?

• Store excess glucose

• Store excess ATP

• Regulate calcium levels

• Provide a phosphate group for ATP synthesis

What is the primary function of muscle tissue?

• Secretion

• Contraction

• Absorption

• Protection