Midterm Practice Exam (ungraded) · Weeks 1–7 (Objectives 1–4)

Course: Anatomy & Physiology I (BIOL 2301 + BIOL 2101) · Silver Oak University (fictional sample) · Prof. Navarro
What this is: a low-stakes rehearsal for the cumulative midterm. It mirrors the real exam's blueprint — same coverage, item-type mix, length, and concept-, scenario-, and quantitative-pocket difficulty — but is built from fresh item-bank variants and shares none of the live midterm's questions.
Settings: ungraded (0 points) · unlimited attempts · feedback shown after submission · opens before the exam window so you can prepare.

This is the human-readable practice exam with its vetted answer key and feedback (released after submission). The import-ready Classic QTI 1.2 is in O-practice-exam-week-08-qti.xml (generated by a validated Python script — parses with 20 items). The Canvas placement block is at the bottom.

Integrity note for students. Every item here is a fresh variant — a new scenario and wording — with a pre-vetted answer. None of these are the live midterm questions. Working them builds the skill the midterm tests, honestly. The paired live exam is L-midterm-week-08.md.

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Blueprint (mirrors the midterm)

Coverage is proportional to teaching time, matching the real exam: Obj 1 = 4 · Obj 2 = 7 · Obj 3 = 5 · Obj 4 = 4. (The actual midterm items are not listed here — only the shared structure.)

#	Type	Concept	Objective	Week
1	Multiple choice	A physiology question vs. an anatomy question	1	1
2	Multiple choice	The body's survival needs (the odd one out)	1	1
3	True / False	Negative vs. positive feedback misconception	1	1
4	Matching	Body planes & cavities → description	1	1
5	Multiple choice	pH: pH 3 vs pH 6 → 100× more H⁺ (quantitative)	2	2
6	Multiple choice	pH: which fluid is most acidic? (quantitative)	2	2
7	Matching	Biomolecule → monomer	2	2
8	Multiple choice	Selectively permeable membrane	2	3
9	True / False	Hypertonic solution misconception	2	3
10	Matching	Central dogma: transcription/translation/mRNA/codon (order) (sequence)	2	4
11	Multiple choice	ATP as the cell's energy currency	2	4
12	Multiple choice	Blood is a connective tissue	3	5
13	Matching	The three muscle types → feature	3	5
14	Multiple choice	The deepest epidermal layer (new cells)	3	6
15	Multiple choice	Melanin function (vs. keratin)	3	6
16	Multiple answer	Epithelial tissue — true features	3	5
17	Multiple choice	The osteoclast releases calcium	4	7
18	Multiple choice	Compact (osteon) vs. spongy (trabeculae) bone	4	7
19	Matching	Long-bone parts → description	4	7
20	Multiple choice	Bone remodeling responds to stress	4	7

Objective totals: Obj 1 = 4 (Q1–Q4) · Obj 2 = 7 (Q5–Q11) · Obj 3 = 5 (Q12–Q16) · Obj 4 = 4 (Q17–Q20) → 20 items (ungraded; mirrors the 100-point midterm's emphasis). Quantitative items: 2 (Q5, Q6 — the pH pocket). Sequence/ordering item: 1 (Q10 — the central dogma).

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Questions, key, and feedback (feedback releases after you submit)

Objective 1 — Body Organization, Terminology & Homeostasis (Week 1)

Q1 (MC). Which question is a question of PHYSIOLOGY rather than anatomy?
- A. What is the shape of the biceps brachii muscle and where does it attach?
- B. How does the biceps brachii generate force to flex the forearm? ✅
- C. How many bones make up the human hand?
- D. What color is freshly oxygenated blood?
Feedback: Physiology asks how something works (how the muscle generates force); the others describe structure — shape, attachment, number, color — which is anatomy. Structure vs. function.

Q2 (MC). Which of the following is NOT one of the body's basic survival needs that must be held within a normal range?
- A. Nutrients
- B. Oxygen
- C. Water
- D. Constant exposure to bright sunlight ✅
Feedback: The body's survival needs include nutrients, oxygen, water, and normal temperature/pressure. Constant bright sunlight is not one — a little UV helps make vitamin D, but the body does not need constant sunlight to survive.

Q3 (True / False). Negative feedback amplifies a change and drives a variable further from its set point.
- True
- False ✅
Feedback: False. Negative feedback OPPOSES a change and returns the variable toward its set point (sweating cools you back down). It's positive feedback that amplifies a change.

Q4 (Matching). Match each anatomical term to its correct description.
| Term | Correct description |
|---|---|
| Sagittal plane | Divides the body into LEFT and RIGHT portions |
| Transverse plane | Divides the body into SUPERIOR and INFERIOR portions |
| Thoracic cavity | The space that houses the heart and lungs |
| Diaphragm | The muscle that separates the thoracic from the abdominopelvic cavity |
Feedback: The sagittal plane splits left/right; the transverse plane splits top/bottom (superior/inferior). The heart and lungs sit in the thoracic cavity, separated from the abdominopelvic cavity by the diaphragm. (The frontal plane — not listed — splits front/back.)

Objective 2 — The Chemistry of Life, the Cell, Transport & Metabolism (Weeks 2–4)

Q5 (MC). Each whole pH unit is a 10-fold change in H⁺ concentration. A solution at pH 3 has how many times more H⁺ than a solution at pH 6?
- A. 3 times more
- B. 30 times more
- C. 1000 times more ✅
- D. 10,000 times more
Feedback: From pH 6 to pH 3 is 3 pH units, and each unit is a 10× change, so 10 × 10 × 10 = 10³ = 1000× more H⁺ (more acidic). (Quantitative item — pre-verified: 10^(6−3) = 1000.) Count the units first, then raise 10 to that power; lower pH = more acidic.

Q6 (MC). Four body-related fluids are measured: gastric fluid pH 2, coffee pH 5, blood pH 7.4, and a cleaning solution pH 9. Remembering that lower pH means more H⁺, which is the MOST acidic?
- A. gastric fluid (pH 2) ✅
- B. coffee (pH 5)
- C. blood (pH 7.4)
- D. the cleaning solution (pH 9)
Feedback: Lower pH = more acidic, so the lowest reading is the most acidic — gastric fluid at pH 2. (Quantitative item — pre-verified: min{2, 5, 7.4, 9} = 2; the cleaning solution at pH 9 is the most basic, not acidic.)

Q7 (Matching). Match each biomolecule to its building block (monomer or basic unit).
| Biomolecule | Correct building block |
|---|---|
| Carbohydrate | Monosaccharide (simple sugar) |
| Protein | Amino acid |
| Nucleic acid (DNA/RNA) | Nucleotide |
| Lipid (fat) | Fatty acids and glycerol (no single repeating monomer) |
Feedback: Pair each macromolecule with its unit: carbohydrate → monosaccharide, protein → amino acid, nucleic acid → nucleotide. Lipids are built from fatty acids + glycerol and have no single repeating monomer (they aren't true polymers).

Q8 (MC). The plasma membrane is a phospholipid bilayer described as 'selectively permeable.' This means the membrane —
- A. lets every substance pass freely in both directions
- B. allows some substances to cross while controlling or blocking others ✅
- C. blocks all substances from ever crossing
- D. is made of a double layer of DNA
Feedback: Selectively permeable = the membrane lets some things cross while controlling or blocking others (that's how the cell keeps its inside different from the outside). (A and C are the all-or-nothing extremes; D confuses the bilayer with DNA.)

Q9 (True / False). When a red blood cell is placed in a hypertonic solution, water moves into the cell and it swells.
- True
- False ✅
Feedback: False. In a hypertonic solution (more solute outside), water moves OUT of the cell and it shrinks (crenates). Water enters and the cell swells in a hypotonic solution — the reverse. (Water always moves toward the side with more solute.)

Q10 (Matching). Match each step of protein synthesis to its correct description and location.
| Term | Correct description / location |
|---|---|
| Transcription | Copying DNA into messenger RNA in the nucleus |
| Translation | Reading mRNA to assemble a protein at the ribosome |
| mRNA | The molecule that carries the DNA message out to the ribosome |
| Codon | Three mRNA bases that specify one amino acid |
Feedback: The central dogma runs DNA → (transcription, nucleus) → mRNA → (translation, ribosome) → protein. mRNA carries the message out; a codon is 3 mRNA bases = 1 amino acid. Don't swap transcription (DNA→mRNA) and translation (mRNA→protein).

Q11 (MC). Which statement best describes ATP?
- A. It is the molecule that stores the cell's long-term genetic information
- B. It is the cell's immediate energy currency, releasing energy when its third phosphate bond breaks to form ADP + Pi ✅
- C. It is the final electron acceptor at the end of respiration
- D. It is a structural protein that supports the cell
Feedback: ATP is the cell's immediate energy currency — it releases energy when its third phosphate bond breaks (→ ADP + Pi). (DNA stores information — A; oxygen is the final electron acceptor — C; ATP is a nucleotide, not a structural protein — D.)

Objective 3 — Tissues & the Integumentary System (Weeks 5–6)

Q12 (MC). Blood is best classified as which of the four primary tissue types?
- A. epithelial tissue
- B. muscle tissue
- C. a fluid connective tissue ✅
- D. nervous tissue
Feedback: Blood is a connective tissue — specifically a fluid connective tissue, with cells (red and white) suspended in a matrix (plasma). (It's a classic surprise: even though it doesn't "connect" things the way a tendon does, its cells-in-a-matrix structure makes it connective.)

Q13 (Matching). Match each of the three muscle types to its identifying feature.
| Muscle type | Correct identifying feature |
|---|---|
| Skeletal muscle | Striated, voluntary, multinucleate fibers attached to bone |
| Cardiac muscle | Striated, involuntary, joined by intercalated discs (in the heart) |
| Smooth muscle | Non-striated, involuntary, in the walls of hollow organs |
Feedback: Skeletal = striated, voluntary, attached to bone; cardiac = striated, involuntary, with intercalated discs (only in the heart); smooth = non-striated, involuntary, in hollow-organ walls. The intercalated discs are the giveaway for cardiac muscle.

Q14 (MC). Which layer of the epidermis is the DEEPEST, containing the dividing stem cells that constantly produce new keratinocytes?
- A. stratum corneum
- B. stratum granulosum
- C. stratum basale ✅
- D. stratum lucidum
Feedback: The stratum basale is the deepest epidermal layer, where stem cells divide to make new keratinocytes that are pushed upward. (The stratum corneum is the most superficial — the dead, keratinized surface; lucidum appears only in thick skin.)

Q15 (MC). What is the main role of MELANIN, the pigment made by melanocytes in the epidermis?
- A. It gives skin its toughness and water resistance the way keratin does
- B. It absorbs ultraviolet (UV) light, giving skin color and protecting deeper cells from UV damage ✅
- C. It carries oxygen to the cells of the epidermis
- D. It produces the oily sebum that waterproofs the skin
Feedback: Melanin absorbs UV light, giving skin its color and shielding deeper cells from UV damage. (A describes keratin — the toughness protein; the epidermis is avascular so nothing "carries oxygen" to it — C; sebum comes from sebaceous glands — D.)

Q16 (Multiple answer — select all that apply). Which of the following statements about EPITHELIAL tissue are true? Select all that apply.
- A. Its cells are tightly packed together, with very little extracellular matrix ✅
- B. It is avascular (has no blood vessels of its own) and rests on a basement membrane ✅
- C. It covers body surfaces and lines cavities, and carries out protection, absorption, and secretion ✅
- D. It is made mostly of a fluid matrix carrying red and white blood cells
- E. Its main job is to contract and move bones
Feedback: Epithelial tissue is packed cells with little matrix (A), avascular and on a basement membrane (B), and it covers/lines surfaces for protection, absorption, and secretion (C). D describes connective tissue (blood); E describes muscle — neither is epithelial.

Objective 4 — Bone Tissue & the Skeletal System (Week 7)

Q17 (MC). Blood calcium has dropped too low. Which bone cell breaks down bone matrix to release calcium back into the blood?
- A. the osteoblast
- B. the osteocyte
- C. the osteoclast ✅
- D. the chondrocyte
Feedback: The osteoclast Chews — it resorbs bone matrix and releases calcium into the blood. (The osteoBlast Builds; the osteocyte maintains; the chondrocyte is a cartilage cell, not a bone cell.) Blast Builds, Clast Chews.

Q18 (MC). How do compact bone and spongy (cancellous) bone differ in microscopic structure?
- A. compact bone is built from osteons; spongy bone is an open lattice of trabeculae ✅
- B. spongy bone is built from osteons; compact bone is built from trabeculae
- C. both are built only from osteons
- D. neither contains any living cells
Feedback: Compact bone = osteons (dense rings around a central canal); spongy bone = trabeculae (an open lattice with marrow in the gaps). (B reverses them — the classic swap; both do contain living cells — D is false.)

Q19 (Matching). Match each part of a long bone (such as the femur) to its description.
| Long-bone part | Correct description |
|---|---|
| Diaphysis | The elongated, tube-shaped shaft |
| Epiphysis | A rounded end of the bone, where it meets a joint |
| Periosteum | Tough membrane covering the outer bone surface |
| Medullary cavity | Hollow center of the shaft that holds marrow |
Feedback: The diaphysis is the shaft; the epiphysis is each end; the periosteum wraps the outside; the medullary cavity is the hollow center holding marrow. The diaphysis-vs-epiphysis pair is the one to keep straight.

Q20 (MC). Astronauts in microgravity and patients on long bed rest lose bone mass, while weight-bearing exercise builds it. This is BEST explained by which idea?
- A. bone is inert mineral that cannot change after childhood
- B. bone is living tissue that is continually remodeled in response to the mechanical stress placed on it ✅
- C. bone can only be built, never broken down, in adults
- D. the amount of bone in the body is fixed at birth
Feedback: Bone is living, remodeling tissue that adapts to mechanical stress (Wolff's law): remove the load (microgravity, bed rest) and bone is lost; add load (weight-bearing exercise) and bone is built. (A, C, and D all treat bone as static — it isn't.)

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Answer key (quick reference)

Q	Answer	Q	Answer
1	B (how it works = physiology)	11	B (ATP = immediate energy currency)
2	D (constant sunlight is not a survival need)	12	C (blood = fluid connective tissue)
3	False (negative feedback opposes the change)	13	Skeletal→striated/voluntary / Cardiac→intercalated discs / Smooth→non-striated
4	Sagittal→left/right / Transverse→sup/inf / Thoracic→heart & lungs / Diaphragm→divides thoracic & abdominopelvic	14	C (stratum basale, deepest)
5	C (1000× — a 3-unit gap, 10³)	15	B (melanin absorbs UV / pigment)
6	A (gastric fluid, pH 2 — most acidic)	16	A, B, C (epithelial: packed, avascular, covers/lines)
7	Carb→monosaccharide / Protein→amino acid / Nucleic acid→nucleotide / Lipid→fatty acids+glycerol	17	C (osteoclast releases calcium)
8	B (some cross, others controlled/blocked)	18	A (compact = osteons; spongy = trabeculae)
9	False (in hypertonic, water leaves; cell shrinks)	19	Diaphysis→shaft / Epiphysis→end / Periosteum→outer membrane / Medullary→marrow cavity
10	Transcription→DNA→mRNA (nucleus) / Translation→mRNA→protein (ribosome) / mRNA→carries message / Codon→3 bases=1 amino acid	20	B (bone remodels in response to stress)

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Quality gate (H5 — self-checked)

• Mirror check: 20 items, coverage Obj 1 = 4 · Obj 2 = 7 · Obj 3 = 5 · Obj 4 = 4 — matches the midterm blueprint's emphasis and item-type mix (12 multiple-choice + 5 matching + 1 multiple-answer + 2 true/false).
• Single-answer integrity: every multiple-choice and true/false item (Q1–Q3, Q5, Q6, Q8, Q9, Q11, Q12, Q14, Q15, Q17, Q18, Q20) has exactly one correct option; the five matching items (Q4, Q7, Q10, Q13, Q19) pair one-to-one; the one multiple-answer item (Q16) keys A, B, C (and requires D and E to be left unselected).
• Anatomy-accuracy gate: PASS. Every anatomical fact and structure→function pairing was verified against the Weeks 1–7 course definitions: anatomy vs. physiology; survival needs; negative vs. positive feedback; the planes/cavities and the diaphragm; the bond/monomer pairings; the selectively permeable bilayer; tonicity (hypertonic → water out); the central dogma (transcription/translation/mRNA/codon); ATP as energy currency; blood as a connective tissue; the three muscle types; the deepest epidermal layer; melanin vs. keratin; the true features of epithelial tissue; the osteoclast releasing calcium; compact (osteons) vs. spongy (trabeculae); the long-bone parts; and remodeling in response to stress.
• Quantitative gate: PASS. Both quantitative items were re-derived in a Python check (/tmp/ap_w08_verify.py): Q5 10^(6−3) = 1000× (keyed answer C); Q6 the most acidic of {2, 5, 7.4, 9} is pH 2 (lowest pH). Numbers are the pre-verified pH values from the course's Week-2 quantitative pocket.
• Factual accuracy: real named structures and processes (the directional planes, the central dogma, the osteon, Wolff's-law remodeling) referenced factually; nothing falls outside the Weeks 1–7 course definitions.
• QTI parse confirmation: O-practice-exam-week-08-qti.xml parses as imsqti_xmlv1p2 with 20 items (generator reported VALID); every single-answer respcondition sets SCORE = 100 on exactly one option. (In Canvas the placement makes it ungraded with feedback on; the engine still scores attempts so students see what they missed.)
• Integrity vs. the live exam: 0 items are shared with L-midterm-week-08.md — verified by full stem comparison. Where a concept slot overlaps the midterm, this form uses a different scenario — e.g., the midterm's pH item asks "how many times more acidic is pH 4 vs pH 7" (1000×) while here Q5 asks "pH 3 vs pH 6" (1000×) and Q6 asks "which of four fluids is most acidic" (pH 2); the midterm orders the respiration stages while here Q10 orders the central dogma; the midterm orders the epidermal layers while here Q14 asks for the single deepest layer; the midterm's bone-cell item is a matching of all three cells while here Q17 isolates the osteoclast.

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Item-bank & coverage note

All 20 items are fresh variants assembled from the Week 1–7 item banks, preferring items not used on the live midterm and authoring fresh scenarios where a concept overlaps. Tagged course=BIOL2301 · form=practice-midterm · weeks=1–7 · objectives=1–4 and deposited back into the banks for future per-term ($39) regenerations. Each term's update regenerates fresh practice variants alongside the midterm and continues to share none of the live items.

Canvas placement block

canvas_object             = Quizzes::Quiz
title                     = "Midterm Practice Exam (ungraded)"
assignment_group          = "Practice exercises"
points_possible           = 0
grading_type              = not_graded
allowed_attempts          = unlimited
show_feedback             = true        # released after submission
available_from_offset_days = -3        # opens 3 days before the exam window
due_offset_days           = 6         # on or before the exam due date
published                 = true
shuffle_answers           = true
provenance                = "~ Prof. Navarro's edition · Fall 2026 · built with thecoursemaker.com"