WCU PHYS 261 Midterm Exam |Most Testes Questions & Answers with Detailed Rationales | West Coast University Human Physiology Exam Prep | Complete PHYS 261 Study Guide | PDF

WCU PHYS 261 Midterm Exam |Most Testes Questions &
Answers with Detailed Rationales | West Coast University
Human Physiology Exam Prep | Complete PHYS 261 Study
Guide | PDF
INTRODUCTION
Prepare for the WCU PHYS 261 Midterm Exam with this comprehensive Human Physiology
practice exam designed to reinforce essential concepts, test clinical and physiological reasoning,
and support focused exam preparation. Each question includes the correct answer and a concise
rationale to help you understand the underlying physiological principles rather than simply
memorize answers.

This practice set covers major PHYS 261 concepts including cellular physiology, homeostasis,
membrane transport, nervous system function, muscle physiology, cardiovascular regulation,
respiratory physiology, renal function, endocrine regulation, and digestive and reproductive
physiology.

COVERAGE
This exam covers:

 Cellular Physiology: Cell structure and function, organelles, plasma membrane, cellular
metabolism, ATP, DNA, RNA, protein synthesis, and cell division.
 Homeostasis: Homeostatic regulation, negative and positive feedback, receptors, control
centers, effectors, and internal physiological balance.
 Membrane Transport: Diffusion, osmosis, facilitated diffusion, active transport,
endocytosis, exocytosis, membrane potentials, and electrolyte distribution.
 Nervous System Physiology: Neurons, action potentials, resting membrane potential,
depolarization, repolarization, synapses, neurotransmitters, CNS, PNS, autonomic
nervous system, and reflexes.
 Muscle Physiology: Skeletal, cardiac, and smooth muscle, sarcomeres, actin, myosin,
troponin, calcium, ATP, neuromuscular junctions, motor units, and muscle contraction.
 Cardiovascular Physiology: Cardiac chambers, valves, electrical conduction, ECG
waves, cardiac output, stroke volume, blood pressure, vascular resistance, circulation,
blood components, and hemostasis.
 Respiratory Physiology: Ventilation, diaphragm function, pressure-volume
relationships, pulmonary gas exchange, oxygen transport, carbon dioxide transport,
surfactant, alveoli, and respiratory regulation.
 Renal Physiology: Nephron structure, glomerular filtration, tubular reabsorption, tubular
secretion, urine formation, ADH, aldosterone, electrolyte regulation, and fluid balance.

,  Endocrine Physiology: Insulin, glucagon, thyroid hormones, cortisol, aldosterone,
growth hormone, ADH, oxytocin, prolactin, PTH, calcitonin, FSH, LH, estrogen,
progesterone, and testosterone.
 Digestive Physiology: Gastrointestinal function, digestion, absorption, gastric secretions,
pancreatic enzymes, bile, intestinal absorption, peristalsis, CCK, secretin, and metabolic
regulation.
 Reproductive Physiology: Gametogenesis, ovulation, fertilization, reproductive
hormones, spermatogenesis, ovarian function, menstrual-cycle regulation, and
pregnancy-related physiology.
 Integrated Physiology: Interactions among organ systems, physiological regulation,
feedback mechanisms, fluid and electrolyte balance, and maintenance of homeostasis.
 Exam-Style Review: 200 multiple-choice practice questions with answers and rationales
for comprehensive PHYS 261 midterm preparation.




Section 1: Foundations, Cells & Homeostasis

1. Which term describes the study of how the human body functions?
A. Anatomy
B. Physiology
C. Histology
D. Pathology

Answer: B. Physiology
Rationale: Physiology focuses on the functions and mechanisms of living
organisms.

2. Which sequence correctly represents increasing levels of biological
organization?
A. Cell → atom → tissue → organ
B. Tissue → cell → organ → organism
C. Atom → molecule → cell → tissue → organ
D. Molecule → organ → cell → tissue

,Answer: C. Atom → molecule → cell → tissue → organ
Rationale: Biological organization progresses from smaller chemical components
to increasingly complex structures.

3. What is the basic structural and functional unit of the human body?
A. Tissue
B. Cell
C. Organ
D. Organ system

Answer: B. Cell
Rationale: Cells are the smallest living units capable of performing essential life
functions.

4. Which characteristic allows the body to maintain relatively stable internal
conditions?
A. Metabolism
B. Differentiation
C. Homeostasis
D. Reproduction

Answer: C. Homeostasis
Rationale: Homeostasis maintains internal conditions within a relatively narrow
range.

5. Which component of a homeostatic control system detects a change in a
regulated variable?
A. Effector
B. Receptor

, C. Control center
D. Stimulus

Answer: B. Receptor
Rationale: Receptors detect changes and transmit information to the control
center.

6. In a typical negative-feedback loop, the response:
A. Amplifies the original disturbance
B. Prevents receptor activity
C. Reverses the initial change
D. Eliminates all physiological variation

Answer: C. Reverses the initial change
Rationale: Negative feedback reduces the deviation from the desired physiological
range.

7. Which is an example of positive feedback?
A. Blood glucose regulation
B. Body temperature regulation
C. Oxytocin-driven uterine contractions
D. Blood pressure regulation

Answer: C. Oxytocin-driven uterine contractions
Rationale: Oxytocin intensifies uterine contractions during labor, amplifying the
initial stimulus.

8. Which organelle is primarily responsible for ATP production?
A. Lysosome