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- What is the differencebetween spatial summationand temporal summation ofmuscle fibers? What is tetany?5. Identify the structures in this diagram of a muscle fiber Describe the function of each structure. 8) 4 9) Modifed by C Seiwert from original by Shaleta madepn Original uploadr was.ermyempat enwkipediaruti werk Abduramanii2 tulk) - Skeital muscda.ont. Pubfic Damain httn/commans.wikimedortwhdechaPeurid-10M Number Name Function 1 3. 4 6. 7 8 00 000 00 2.What is theneurotransmitter of theneuromuscular junction? Howdoes the nervous systemtrigger muscle contraction?
- 27. Which of the following seutences is NOI curreet? I Myotibroblast is a connective tissse cell that contuns propemes of sanooth muscle celle III Ounonin is the eall mevement of salts fomaegian af higher cancentration to a repion of lauer couccutrutsen darongh a pertially permcalble ueubnae IV. chrcuos uf circalating RBCa nE cuained in the sucleus v. Catctiol (acuve form of vataman D) elevates blood Ca" by actung ca atestne, kadaeys and stiulate osteoblant setivityWatch this short video (http://openstaxcollege.org/l/facialnerve) to see an examination of the facial nerve using some simple tests. The facial nerve controls the muscles of facial expression. Severe deficits will be obvious in watching someone use those muscles for normal control. One side of the face might not move like the other side. But directed tests, especially for contraction against resistance, require a formal testing of the muscles. The muscles of the upper and lower face need to be tested. The strength test in this video involves the patient squeezing her eyes shut and the examiner trying to pry her eyes open. Why does the examiner ask her to try a second time?Poorly conditioned, middle-aged peoplemay suffer a rupture of the calcaneal tendonwhen the foot is suddenly dorsiflexed, asin hitting the ground when jumping downfrom a height. Explain each of the followingsigns of a ruptured calcaneal tendon: (a)a prominent lump typically appears in thecalf; (b) the foot can be dorsiflexed fartherthan usual; and (c) the patient cannot plantarflex the foot very effectively
- The disease poliomyelitis (po′le-o-mi′˘e-li′tis) destroys motor neurons, causingloss of muscle function and even flaccid paralysis. Some patients recoverbecause axon branches form from the remaining motor neurons. Thesebranches innervate the paralyzed muscle fibers to produce motor unitswith many more muscle fibers than usual. How does this reinnervation ofmuscle fibers affect the degree of muscle control in a person who hasrecovered from poliomyelitis?NAME THE CHEMICAL TRANSMISSION AND THE NERVOUS SYSTEMBETWEEN A MOTOR NEURONE AND A SKELETAL MUSCLE. ANDEXPLAIN THE STEPS OF THIS CHEMICAL TRANSMISSION ONSKELETAL MUSCLES.Luke Marks is a 40-year-old male who was brought into ED by ambulance after he cameoff his motorcycle at 40km/hr after hitting a pothole in the road. The incident was calledin by a bystander, an off-duty lifeguard, who helped to stabilise his c-spine by supportinghis head (in a badly scratched helmet) and spoke to him until paramedics arrived.Handover from paramedics included: GCS 15, PERRLA, nil evidence of head injury despitea head strike, but Luke was unable to move his arms and legs and stated he had nilsensation in his legs and the sensation in his hands felt strange. The paramedics safelyremoved his helmet and safely secured a hard collar around his neck before transportinghim to hospital. Luke reported pain of 8/10 in his cervical spine but nowhere else. His vitalsigns were as follows: RR 22, SpO2 98% RA, HR 59bpm, BP 125/63 mmHg, Temp 35.7degrees.Paramedics administered 8mg IV ondansetron, 5mg s/c morphine and 250ml of NaCl(0.99%) en route.Luke has no significant medical…
- Which hormone causescontraction of smooth musclesurrounding milk glands of themammary gland (or of themyometrium for that matter)?Table1.Contractionofsmoothmusclebythreeagonists Contractileresponse(mm) Loglagonist] (M) -10 -9 -8.5 -8 -7.5 -7 -6.5 -6 -5.5 -5 -4.5 -4 agonist-1 0.2 1.8 4 9.8 14.8 18 19.6 19.4 20 20 20 20 agonist-2 0.2 1 2.6 4 7.6 8.8 9.6 9.8 10 10 agonist-3 0.2 2 5.2 10 14.8 18 19.6 20 a) Experiments were performed on the contraction of smooth muscleusingincreasingconcentrationsofthreeagonistsandtherespo nsesare given in Table 1. The maximum response of the system was 20mm contraction. Calculate the % maximum response of the systemforeachconcentrationofagonistandplotgraphsshowingthede pendence of the response on log [agonist]. Compare the threeagonists in terms of their maximal effect and their potency usingpharmacologicalterms. EIN 5of his parent's house over the weekend. On Monday, he arrived at the clinic ainful back spasms. He reports having picked up a heavy box of books by h his legs straight. up has Pete probably strained? uscles at risk when one lifts objects improperly? t 1) the type of muscle fibers and their characteristics, and 2) the type of lever her it is operating at mechanical advantage or disadvantage.