Calculus at Maryland comes in three basic flavors - the MATH140/141/241 series, designed for engineering and the physical sciences, MATH136, designed for the biological sciences, and MATH120/121, which is geared towards non-technical majors.
The MATH140 series of calculus courses are the most rigorous and abstract, and we only recommend taking them if required by your major. MATH120 is significantly easier, as it focuses on practical applications rather than the more theoretical aspects of calculus. MATH136 is somewhere in between, covering more concepts but shying away from rigorous proofs.
Bottom line - don't take MATH140 unless you really love math, or are required to take it by your major.