Sarcomeres
What two fibers make up a sarcomere?
Actin and mysoin
Insects have what type of skeleton?
Exoskeleton
Where are the heads involved in muscle contraction found?
On myosin
Name one adaption of marine mammals to living in water.
Blowholes for breathing, low SA:V ratio, streamline bodies, limbs evolved to flippers, more blood, high myoglobin concentration, large lungs
What is the membrane surrounding the muscle fiber?
Sarcolemma
I band
What connects muscle to bone?
Tendons
What is the name of the President's retreat in the Appalachian Mountains?
Camp David
What does myosin form when it binds to actin?
A cross bridge
What is the movement of an organisms whole body to forage, escape predators, etc?
Locomotion
What is the anchor point on either side of a sarcomere?
Z disc
What number is indicated by the Roman numeral D?
500
What are the 2 inhibitory molecules on actin?
Troponin and tropomyosin
Who is the red haired female character in the "Scooby-Doo" cartoon franchise?
Daphne
Which American financier was convicted of running the largest Ponzi scheme in U.S. history?
Bernie Madoff
Facebook was originally developed as a social tool for students at which university?
Harvard
What two parts of the joint capsule help bones slide past each other smoothly?
Cartilage and synovial fluid
What is the large protein that gives elasticity to sarcomere and prevents excessive stretching?
Titin
What is the role of ATP in contraction? (2 things)
Breaks the actin-myosin bond and swivels the myosin head
What neurotransmitter is involved in muscle contraction?
Acetylcholine
Which region contains both thick and thin filaments?
A band
What 3 bones are joined at the elbow joint?
Ulna, radius, humerus
What is the role of calcium in muscle contraction?
Bind to troponin to expose binding sites for myosin
What 2 regions of a sarcomere shorten during contraction?
I band, H zone
What is the inhibitor that covers actin binding sites?
Tropomyosin