The Falcons signed Harrison to the active roster from their practice squad Tuesday, Tori McElhaney of the team's official site reports.
Dorlus (thumb) was a full participant in Tuesday's practice, Tori McElhaney of the Falcons' official site reports.
Muse (shoulder) was a full participant in Tuesday's practice, Tori McElhaney of the Falcons' official site reports.
Henderson is expected to step into a starting role at cornerback in Week 3, Tori McElhaney of the Falcons' official website reports.
Robinson (ankle) was a full participant in Tuesday's practice, Tori McElhaney of the Falcons' official site reports.
Tagovailoa (oblique) was a full participant in Tuesday's practice, Tori McElhaney of the team's official site reports.
The Falcons placed Terrell (groin) on injured reserve Tuesday, Tori McElhaney of the team's official site reports.
Branch caught both of his targets for 14 yards and returned one punt for seven yards in Sunday's 34-3 loss against the Panthers.
Hooper caught two of his four targets for 20 yards in Sunday's 34-3 loss to the Panthers.