What's the difference between challenging and effort?

Challenging


Definition:

  • (p. pr. & vb. n.) of Challenge

Example Sentences:

  • (1) Bronchial challenge caused an immediate asthmatic response.
  • (2) When chimeric animals were subjected to a lethal challenge of endotoxin, their response was markedly altered by the transferred lymphoid cells.
  • (3) This frees the student to experience the excitement and challenge of learning and the joy of helping people.
  • (4) The degree of increase in Meth responsiveness elicited by the initial provocation is a major factor in determining the airway response to a subsequent HS challenge.
  • (5) Intranasal challenge of allergic subjects with the allergen to which they are sensitive rapidly produces sneezing, rhinorrhea, and airway obstruction.
  • (6) Matthias Müller, VW’s chief executive, said: “In light of the wide range of challenges we are currently facing, we are satisfied overall with the start we have made to what will undoubtedly be a demanding fiscal year 2016.
  • (7) In 1935, Einstein challenged the prevailing interpretation of quantum theory.
  • (8) A shrinking populace is perhaps a greater challenge than any problems with Russia.
  • (9) Intraperitoneal injection of indomethacin to pretreated animals resulted in increased levels of IL-1 and TNF and decreased levels of PGE2 following challenge with E. coli.
  • (10) Think of Nelson Mandela – there is a determination, an unwillingness to bend in the face of challenges, that earns you respect and makes people look to you for guidance.
  • (11) The children's pulse, pulse rate variability, and blood pressure were then measured at rest and during a challenging situation.
  • (12) At first it looked as though the winger might have shown too much of the ball to the defence, yet he managed to gain a crucial last touch to nudge it past Phil Jones and into the path of Jerome, who slipped Chris Smalling’s attempt at a covering tackle and held off Michael Carrick’s challenge to place a shot past an exposed De Gea.
  • (13) The results support the notion that mediator lymphocytes circulate in tumor immunized rats in a noncytotoxic state, specifically recognize tumor cells at a challenge site, and mediate induction of effector cells locally.
  • (14) The role of blood acetylcholinesterase in moderating the effects of organophosphate challenge in rats was tested.
  • (15) In the first trial to investigate the effect of tick control, significant improvements in liveweight gain (LWG) occurred only in periods of medium to high challenge with adult Amblyomma variegatum.
  • (16) The SNT and the I-ELISA indicated that the pigs responded to vaccination and challenge.
  • (17) When caffeine evokes a contraction, and only then, crayfish muscle fibers become refractory to a second challenge with caffeine for up to 20 min in the standard saline (5 mM K(o)).
  • (18) This observation seriously challenges the hypothesis that SCE cancellation results as a consequence of persistence of the lesions induced by these agents.
  • (19) Injection of about four ImD 50 of vaccine intracerebrally produced a local immunity, resulting in an immediate kill of challenge organisms given 14 days later.
  • (20) There was no correlation between anti-TNP-precipitating antibody titer after sensitization and the ability to respond to challenge by hapten-heterologous carrier.

Effort


Definition:

  • (n.) An exertion of strength or power, whether physical or mental, in performing an act or aiming at an object; more or less strenuous endeavor; struggle directed to the accomplishment of an object; as, an effort to scale a wall.
  • (n.) A force acting on a body in the direction of its motion.
  • (v. t.) To stimulate.

Example Sentences:

  • (1) An effective graft-surveillance protocol needs to be applicable to all patients; practical in terms of time, effort, and cost; reliable; and able to detect, grade, and assess progression of lesions.
  • (2) Recently, the validity of the American Thoracic Society (ATS) standards for selection of spirometric test results has been questioned based on the finding of inverse dependence of FEV1 on effort.
  • (3) Research efforts in the Swedish schools are of high quality and are remarkably prolific.
  • (4) Several efforts to extradite Polanski to California have failed.
  • (5) Another important factor, however, seems to be that patients, their families, doctors and employers estimate capacity of performance on account of the specific illness, thus calling for intensified efforts toward rehabilitation.
  • (6) King Salman of Saudi Arabia urged the redoubling of efforts to “eradicate this dangerous scourge and rid the world of its evils”.
  • (7) Their efforts will include blocking the NSA from undermining encryption and barring other law enforcement agencies from collecting US data in bulk.
  • (8) In light of these findings, the implications of the need to address appraisals and coping efforts in research and therapy with incest victims was emphasized.
  • (9) Mastitis in its complexity has managed to forestall all efforts of eradication in spite of years of research, antibiotics and practical control measures.
  • (10) Crown prince Sultan Bin Abdel Aziz said yesterday that the state had "spared no effort" to avoid such disasters but added that "it cannot stop what God has preordained.
  • (11) In our efforts to explore alternative treatment regimens for multidrug-resistant tumors we have examined the sensitivity of MDR tumor cell lines to lymphokine activated killer (LAK) cells.
  • (12) This will help nursing grow as a profession, particularly through entrepreneurial and intrapreneurial efforts.
  • (13) However, our theory differs in several important respects from the latter efforts.
  • (14) The results of our utilization review were conveyed to local hospitals and the blood supplier in an effort to preserved donor blood.
  • (15) In an effort to understand the regulation of the onset of testosterone formation in the human fetal testis we measured adenylate cyclase activity in response to hCG stimulation in homogenates of fetal testes obtained from first and second trimester human abortuses.
  • (16) In addition, special efforts are made to combine HIV-infected women to avoid pregnancy and childbearing, both for their own prognosis and the health of the infant.
  • (17) In an effort to identify the optimal dose and strain of measles vaccination for early immunization, Peruvian infants were randomly assigned to receive one of three measles vaccines in varying doses at 5 to 6 or 8 to 9 months of age.
  • (18) Abe’s longstanding efforts toward those goals, which include the successful passage of a state secrets act and efforts to expand the scope of Japan’s military activities have already damaged relations with China.
  • (19) Chadwick felt that Customs and Trading Standards needed to continue their war on illegal tobacco – if not, efforts to tackle smoking could be undermined.
  • (20) "We must be clear that there can be no letup in our efforts to seek ways to remove Bill Walker from parliament," Rennie said.