Question
Human Physiology wiz needed
59. The hormone estradiol does all of the following. a) stimulates bone and muscle growth b) maintains female secondary sex characteristics c) stimulates the symptoms of menopause d) maintains functional accessory reproductive glands and organs e) initiates repair and growth of the endometriunm except PART 2 MULTIPLE CHOICE (2 points each) 60) complete tetanus A) involves some relaxation between twitches B) involves development of maximum tension. C) occurs at a lower frequency of stimulation than unfused tetanus. D) occur when there is more time between twitch contractions 61) A motor unit consists of A) one neuron and all the skeletal muscle fibers it controls. B) one skeletal muscle fiber and all the neurons that control that fiber. C) one skeletal muscle fiber and the neuron that controls that fiber. D) one axon terminal branch and the myofibrils it controls. 62. Most of the time, the parallel thick and thin filaments of the myofibrils are connected by A) tropomyosin molecules B) crossbridges C) nebulin molecules D) sarcomeres E) calcium ions that span the space between myosin and actin molecules. 63) The tension generated in a skeletal muscle fiber is directly proportional to the number A) thick and thin filaments present. B) nebulin and titin molecules present C) crossbridges formed. D) number of z disks. E) active sarcomeres. 64. Each myosin head has a binding site for A) calcium only. B) actin only. C) ATP only. D) calcium and ATP E) actin and ATP
Explanation / Answer
59) option c stimulates the symptoms of menopause. 60)complete tetanus:involves development of maximum tension(option b). 61)option a, one neuron and all of the skeletal muscle fibers ir control. 62)option c, nebulin molecules. 63)option c, number of crossbridges formed. 64)option e, actin and ATP.
