A.   TRUE

B.   FALSE

A.   Ca+2 binds to troponin which in turn causes movement of tropomyosin

B.   actin slides past myosin and the sarcomere shortens

C.   ATP breaks down causing the myosin head to swivel

D.   myosin head attaches to G-actin

E.   movement of tropomyosin "unblocks" the active sites on the G-actin

A.   TRUE

B.   FALSE

A.   lowest ability to resist fatigue and slow contraction velocity

B.   main source of ATP is from anaerobic respiration and lowest ability to resist fatigue

C.   high concentrations of myoglobin and slow contraction velocity

D.   main source of ATP is from anaerobic respiratioc and largest fiber diameter

A.   FALSE

B.   TRUE

A.   they attach to receptors on the outside of the cell membrane

B.   G-protein on the inner surface of the cell membrane is activated, they attach to receptors on the outside of the cell membrane, secondary messengers within the cell are produced or activated and secondary messenger activates or deactivates specific enzymes or open ion channels

C.   secondary messenger activates or deactivates specific enzymes or open ion channels

D.   secondary messengers within the cell are produced or activated

E.   G-protein on the inner surface of the cell membrane is activated

A.   FALSE

B.   TRUE

A.   increases water reabsorption by the kidney, increases blood volume, decreases urine volume and increases the blood pressure

B.   decreases urine volume and increases the blood pressure

C.   increases water reabsorption by the kidneys

D.   decreases urine volume

A.   FALSE

B.   TRUE

A.   stimulates the uptake of glucose into the cell, stimulates glucose catabolism and stimulates glycogenesis in skeletal muscles and liver

B.   stimulates amino acid absorption and protein synthesis, stimulates glucose catabolism and stimulates lipogenesis in adipose tissues

C.   stimulates amino acid absorption and protein synthesis, stimulates the uptake of glucose into the cell and stimulates lipogenesis in adipose tissues

A.   stimulates cellular respiration in almost all cells

B.   inhibits glycogenolysis, fat and protein catabolism

C.   promotes normal development and function of the nervous, muscular and skeletal systems

D.   increases heat production

E.   increases the use of oxygen