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Blood and the Lymphatic/Immune System — HS Anatomy & Physiology practice questions

12 multiple-choice questions and 12 flashcards on Blood and the Lymphatic/Immune System, about 8% of the HS Anatomy & Physiology bank. Every one carries a written rationale.

Written and maintained by the CoStudy team · last updated 2026-10-02 · how we write and review questions

What this chapter covers

Blood and the Lymphatic/Immune System is one of 13 chapters in CoStudy's HS Anatomy & Physiology bank, and it holds 12 of the bank's 150 multiple-choice questions — roughly 8% of the total. That proportion is not arbitrary: chapters follow the certifying body's published exam outline, and the number of questions in each is set by that domain's published weight, so the share of your practice time this chapter takes matches the share of the real exam it accounts for.

Studying by chapter is worth doing once you have a diagnostic score. A single overall percentage tells you whether you are close; it does not tell you which domain is dragging. Working a weak chapter in isolation, and re-testing it in isolation, is the fastest way to move a score that has stalled — and it is why the mock exams in CoStudy report by domain rather than as one number.

Free Blood and the Lymphatic/Immune System practice questions

3 questions drawn from this chapter, with the full rationale shown — the controlling principle behind the right answer, and why each wrong option tempts and fails.

Red blood cells carry oxygen using:

  1. plasma proteins
  2. antibodies
  3. platelets
  4. hemoglobin

Answer: D — hemoglobin

D) Correct — Each hemoglobin molecule contains iron that binds O₂. A) Albumin and others carry many substances, but not most O₂. B) Are immune proteins. C) Help blood clot.

HIV weakens the immune system mainly by destroying:

  1. red blood cells
  2. helper T cells
  3. platelets
  4. neutrophils

Answer: B — helper T cells

B) Correct — Without helper T cells, B cells and cytotoxic T cells are poorly activated. A) HIV does not target red blood cells. C) Clotting cells are not HIV's main target. D) HIV targets cells with CD4 receptors.

Which blood type is called the universal recipient?

  1. AB⁺
  2. O⁻
  3. A⁺
  4. B⁻

Answer: A — AB⁺

A) Correct — It has no anti-A, anti-B, or anti-Rh antibodies to attack donor cells. B) Is the universal donor. C) Has anti-B antibodies. D) Has anti-A antibodies.

Blood and the Lymphatic/Immune System flashcards

3 cards from the 12 in this chapter.

Innate vs adaptive immunity?

Innate: nonspecific, immediate (skin, neutrophils). Adaptive: specific, slower, has memory (T + B cells).

Spleen function?

Filters blood, recycles old RBCs, fights infection, stores blood.

Blood components?

Plasma (55%), red blood cells (oxygen), white blood cells (immune), platelets (clotting).

Practise the full chapter

These are a sample. The full Blood and the Lymphatic/Immune System chapter runs 24 items with per-chapter progress tracking, on the web and in the iOS app.

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