Human Physiology and Muscular Function Quiz

Skeletal system provides structural support and protection.

Heart and blood vessels circulate substances throughout the body.

Insulin lowers blood glucose levels.

Lymphatic system helps in immunity and fluid balance.

Respiratory system facilitates gas exchange.

Ureter is a tube connecting kidney to bladder, not part of nephron.

Parathyroid hormone increases blood calcium levels.

Liver produces bile for digestion.

Synapse facilitates communication between neurons.

Oxytocin is produced by the posterior pituitary gland.

Triceps brachii extends the forearm.

Acetylcholine initiates muscle contraction.

Skeletal muscles are controlled consciously.

Sarcomere is the basic unit of muscle contraction.

Sarcoplasmic reticulum regulates calcium levels during muscle contraction.

Deltoid abducts the shoulder.

Smooth muscle regulates blood vessel diameter.

Creatine phosphate replenishes ATP for muscle energy.

Cardiac muscle contracts rhythmically without conscious control.

Troponin and tropomyosin regulate muscle contraction by blocking myosin binding sites.

Accumulation of lactic acid causes muscle fatigue.

Slow-twitch fibers are not designed for rapid force generation.

Elasticity is the property of muscles to return to initial length.

Integumentary system is not involved in blood cell production.

Endocrine system regulates hormones, not voluntary movements.