Coach Lovie Smith declined to assign individual blame for the only interception Sunday or the failure to reach the end zone after having second-and-goal from the 1-yard line.
"Normally if there's a bad play, it's a combination of things," he said. "I'm sure Jay (Cutler) would like to have the ball back. Devin (Hester) would probably say he could run a little bit better route.
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"There are a lot of things that go into that. I just know that it was a play that really gave (Green Bay) momentum as much as anything."
The Packers turned their only take-away into 7 points just before halftime.
Late in the third quarter, with a chance to halve their 14-point deficit with a TD, the Bears settled for a field goal. Matt Forte was stuffed twice before Alshon Jeffery's apparent TD catch was wiped out by a pass interference call against him.
"Normally it's a combination of blocking a little bit better and of course running a little bit better," Smith said. "It's not an exact science a lot of times.
"I just know when you're in a situation, everybody that's involved in the play needs to do a better job."
Face of the franchise:
Sunday night on Fox-TV, injured linebacker Brian Urlacher responded to criticism of coach Lovie Smith and the team by saying: "Two of the people I don't care about: fans and media."
Smith was asked for his response.
"First off it would be hard for me to respond to those comments when I haven't heard the comments," he said. "I just know who Brian Urlacher is. I know that he loves being a Chicago Bear.
"He's helped us win a lot of football games around here. He's a leader. He's disappointed like we all are right now in a position we were in (Sunday), and he's going to come to work this week getting ready for Arizona."
Urlacher is expected to miss his third straight game this week with a hamstring injury.
In the final quarter of his nine seasons with the Bears, Lovie Smith's teams have a combined 15-19 record.
So he was asked if he reviewed those results for possible signs of wearing down late in the season.
"You can't," he said. "Because everything we do is to put the best team on the field that week.
"We have done anything imaginable to try to not have our guys wear down, from even last week adjusting our schedule and not practicing a day.
"No, I don't think any of those things happen. I think some years it's just that way."
After losing six straight and eight of nine to the Packers, Lovie Smith is at a loss for why his team doesn't match up better.
"We'll keep trying to figure that out," he said. "Right now, when you've lost as many as we have, I can't give you a good reason for it. (Sunday) was as close as … we've made progress. We were in the game early on.
"We just couldn't finish the job. That's why it's important for us right now to just keep working to possibly have another opportunity to solve that."
Frustrated wide receiver Brandon Marshall said everyone should be held accountable for the recent 1-5 slump, even if it means jobs.
"I would like to think that all throughout the season we've stressed being accountable with every position," coach Lovie Smith said. "With all of us, coaches, players and all of us. I don't think anything has changed from that."
Offensive tackle Cory Brandon was promoted from the practice squad to the 53-man roster, and defensive tackle Matt Toeaina (knee) was placed on injured reserve.
The 6-foot-7, 324-pound Brandon entered the NFL as an undrafted free agent with the Tampa Bay Bucs in 2011. Toeaina played in three games with two starts.
Asked if he had considered any coaching changes on his staff, Lovie Smith said: "Our same coaching staff that we had (Sunday) will be in their same jobs this week."