Associate vs. Bachelor’s (BSRC): Prerequisite Differences- how the prerequisite load differs between an associate and a bachelor’s path into respiratory therapy — including the physics most associate programs skip.
If you’re deciding between an associate and a bachelor’s path into respiratory therapy, the prerequisites are one of the first practical differences you’ll run into. Both routes require a solid science foundation, but the bachelor’s path generally asks for more of it — more total credits, more general education, and often science courses, like physics, that associate programs don’t require. Knowing that difference up front helps you plan the right set of courses and avoid surprises.
This guide compares the prerequisite load for each path, explains the physics-and-statistics gap that catches bachelor’s applicants off guard, and shows how to complete whichever set you need. You can compare accredited programs at both levels through the Commission on Accreditation for Respiratory Care (CoARC).
Short answer: Both paths share a core science foundation — anatomy and physiology, microbiology, chemistry, and math. But entry-level bachelor’s (BSRC) programs typically require a heavier prerequisite load, often 54–60 college credits, and more frequently include physics and statistics that associate programs may not. If you’re aiming for a bachelor’s, plan for that larger course volume from the start.
Before comparing prerequisites, it helps to know there are two different bachelor’s structures in respiratory care, because they have very different entry requirements:
This guide focuses on the choice most people entering the field actually face: an entry-level associate degree versus an entry-level bachelor’s. If you’re already a licensed RT, the degree-advancement route is a different conversation.
Here’s how the typical prerequisite load compares between the two entry paths. Exact requirements vary by program, so treat this as the general pattern, not a universal rule.
| Prerequisite | Associate (entry) | Bachelor’s / BSRC (entry) |
|---|---|---|
| Anatomy & Physiology I & II | Required | Required |
| Microbiology | Usually required | Required |
| Chemistry | Often required (sometimes one semester) | Commonly required (often general chemistry) |
| College math / statistics | Required (often algebra) | Required (statistics common) |
| Physics | Often not required | More often required or recommended |
| English / communication | Usually required | Required (often two courses) |
| Social sciences / general education | Some | More extensive |
| Typical total prerequisite credits | Fewer | Often 54–60 |
The pattern is clear: the science core is shared, but the bachelor’s path layers on more — more general education, more frequently statistics over basic algebra, and the science course that most distinguishes the two paths: physics.
Whichever path you choose, the same science prerequisites form the foundation — and they’re the highest-stakes courses for admission either way:
Because this core is shared, the prerequisites you complete generally apply whether you ultimately pursue an associate or a bachelor’s — which is good news if you’re not yet certain which path you’ll take.
If there’s one prerequisite that separates the two paths, it’s physics. Associate programs frequently don’t require it; entry-level bachelor’s programs more often do, either as a requirement or a strong recommendation. For applicants who assumed respiratory therapy was “all biology,” the physics requirement can be an unwelcome surprise late in the planning process.
Why physics shows up more on the bachelor’s side:
The practical takeaway: if you’re aiming for a bachelor’s, check early whether physics is on the list. Discovering a physics requirement at the last minute can cost you an entire application cycle — the same trap that catches applicants who leave any prerequisite too late.
Prerequisites are one factor; your goals and timeline matter too. A quick way to think about it:
Whichever you choose, the science core is the same starting point, and admission at both levels is competitive — so strong prerequisite grades matter. For more on that, see what GPA you need for respiratory therapy school and how competitive RT admission is.
Because the science core is shared and bachelor’s programs simply add to it, the most efficient approach is to complete your prerequisites online and self-paced, on one accredited transcript, and scale the set to your chosen path. The RT Science Prerequisite Bundle lets you complete anatomy and physiology, microbiology, chemistry, math or statistics, and medical terminology through a regionally accredited university partner — taking the lighter set for an associate path or the fuller set for a bachelor’s.
If some of your prerequisites are older, check the recency rules before you apply — many programs require recent science coursework. And if your science grades need strengthening for a competitive bachelor’s application, our guide to improving your science GPA walks through the retake strategy.
Do bachelor’s RT programs require more prerequisites than associate programs?
Generally yes. Entry-level bachelor’s (BSRC) programs typically require a heavier prerequisite load — often 54–60 credits — with more general education and more frequently physics and statistics than associate programs.
Do I need physics for respiratory therapy?
It depends on the path. Associate programs often don’t require physics, while entry-level bachelor’s programs more frequently require or recommend it. Check your target program early, since physics is a common late surprise.
Are the science prerequisites the same for both?
The core is shared: anatomy and physiology, microbiology, chemistry, and math are required at both levels. Bachelor’s programs add to that core rather than replacing it, so prerequisites you complete generally apply to either path.
Is an associate or bachelor’s better for respiratory therapy?
An associate is faster and lighter on prerequisites; a bachelor’s opens more advancement, leadership, and specialized roles and is increasingly the standard. Your goals, timeline, and budget should guide the choice.
What’s the difference between an entry-level BSRC and an RRT-to-BSRC?
Entry-level BSRC programs are for people not yet in the field and involve the full prerequisite slate. RRT-to-BSRC (degree-advancement) programs are for already-credentialed RTs and focus on leadership and research, not entry prerequisites.
Can I complete bachelor’s prerequisites online?
Yes. The science and foundation prerequisites — including the extra courses bachelor’s programs require — can be completed online and self-paced through a regionally accredited institution. Confirm acceptance, including any lab, with your program.
Both the associate and bachelor’s paths into respiratory therapy share a science core — anatomy and physiology, microbiology, chemistry, and math — but the entry-level bachelor’s route carries a heavier prerequisite load, often 54–60 credits, with more general education and, frequently, physics and statistics that associate programs skip. Plan for that difference early so a late-discovered requirement doesn’t cost you a cycle. After you complete a program at either level, the National Board for Respiratory Care (NBRC) administers the credentialing exams that lead to licensure. (For the bigger picture on the field, the American Association for Respiratory Care (AARC) is the profession’s main organization.)
Ready to complete your prerequisites? Build the right set for your path with the RT Science Prerequisite Bundle — online, self-paced, regionally accredited courses on one official transcript. Confirm your target program’s exact prerequisite list, including whether physics is required, with its admissions office before enrolling.
Plan the right prerequisite set for your path:
Prerequisite lists, credit totals, whether physics is required, and degree-pathway structures vary widely by institution and change over time. This guide is general information only. Always confirm the specific prerequisites directly with the respiratory therapy programs you intend to apply to.
