Potpourri
Approximately 30 kg.
What is the mass of water in an individual that weighs 50 kg?
Sympathetic
What nervous system gets activated when you are running from an alligator?
Myosin, actin, tropomyosin, and troponin.
What are 4 proteins that make up the sarcomere in skeletal muscle cells?
What is the liver?
Adds complementary nucleotides to a replicating DNA strand.
What is DNA polymerase?
Contains an anticodon
What is a transfer RNA (tRNA)?
What is resting membrane potential?
Dense bodies
What are the alpha-actinin complexes scattered throughout smooth muscles that allow them to contract in various directions?
Main site of ATP production in the cell?
What is the mitochondria?
What segments are removed from pre-mRNA and not used in the mature mRNA that is translated into protein?
Stops DNA from supercoiling during replication.
What is topoisomerase?
Potassium
What ion's concentration is higher inside the cell than outside at a cell's resting potential?
These two muscles use tropomyosin and troponin to contract.
What are cardiac and skeletal muscle?
Small protein complexes that coat the rough endoplasmic reticulum.
What are ribosomes?
Because different combinations of exons can be used to form the mature mRNA.
Why can multiple different proteins be produced from a single pre-mRNA?
What is tumor necrosis factor-alpha?
Sodium channels close quickly and voltage-gated potassium channels open
What event occurs as the action potential of a myocyte reaches its peak?
These cells generate the heartbeat but don't contract themselves.
What are cells of the sinoatrial node?
The T3 and T4 hormones produced by the thyroid perform this function to the hypothalamus and pituitary glands?
What is negative feedback inhibition?
The process by which conditions in the body are regulated to maintain a stable environment.
What is homeostasis?
Extracellular
What is the main source of calcium for smooth muscles during contraction?
-55 mV
At what voltage during a neuron's action potential do voltage-gated sodium channels open?
Allows the cardiac muscles to be contracted for longer to ensure the chambers are adequately emptied.
What is the purpose of the plateau phase of the myocyte action potential?
Hey look! I can see cytokines and neutrophils.
What is the immune system?
Guides the small ribosomal subunit to the mRNA.
What is elongation initiation factor?