TESTBANK FOR HUMAN PHYSIOLOGY AN
INTERGRATED APPROACH 8TH EDITION BY
SILVERTHORN COVERING CHAPTER 1-26
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q7A 2027 |INSTANT DOWNLOAD PDF
1. Which statement best describes homeostasis?
A. Maintenance of a completely unchanging internal
environment
B. Maintenance of relatively stable internal conditions despite
external changes
C. Elimination of all variation in physiological processes
D. Prevention of communication between organ systems
Answer: B. Maintenance of relatively stable internal conditions
despite external changes
Rationale: Homeostasis maintains internal conditions within an
appropriate range rather than keeping them absolutely
constant.
2. Which level of organization consists of groups of similar
cells performing a common function?
A. Organ
B. Tissue
C. Organ system
D. Organism
,Answer: B. Tissue
Rationale: A tissue is a group of similar cells organized to
perform a particular function.
3. What is the primary function of a receptor in a homeostatic
control system?
A. Produce a response
B. Detect a change in a regulated variable
C. Store nutrients
D. Eliminate waste
Answer: B. Detect a change in a regulated variable
Rationale: Receptors monitor internal or external conditions
and provide information to the integrating center.
4. Which type of feedback generally stabilizes a physiological
variable?
A. Positive feedback
B. Negative feedback
C. Feedforward amplification
D. Positive inhibition
Answer: B. Negative feedback
Rationale: Negative feedback opposes the initial change and
helps maintain homeostasis.
5. Which organelle is primarily responsible for ATP
production?
A. Lysosome
B. Golgi apparatus
,C. Mitochondrion
D. Nucleus
Answer: C. Mitochondrion
Rationale: Mitochondria generate most cellular ATP through
oxidative metabolism.
6. The plasma membrane is primarily composed of:
A. DNA and RNA
B. Phospholipids and proteins
C. Glycogen and cholesterol only
D. Calcium and phosphate
Answer: B. Phospholipids and proteins
Rationale: The phospholipid bilayer with embedded proteins
forms the basic structure of the plasma membrane.
7. Movement of molecules from an area of higher
concentration to an area of lower concentration is called:
A. Active transport
B. Diffusion
C. Endocytosis
D. Exocytosis
Answer: B. Diffusion
Rationale: Diffusion is passive movement down a concentration
gradient.
8. Which process requires cellular energy in the form of ATP?
A. Simple diffusion
B. Osmosis
, C. Primary active transport
D. Filtration
Answer: C. Primary active transport
Rationale: Primary active transport directly uses ATP to move
substances against their gradients.
9. Osmosis refers specifically to the movement of:
A. Proteins
B. Solutes
C. Water
D. ATP
Answer: C. Water
Rationale: Osmosis is the net movement of water across a
selectively permeable membrane.
10. Which solution would cause a typical cell to lose water?
A. Hypotonic solution
B. Isotonic solution
C. Hypertonic solution
D. Pure water
Answer: C. Hypertonic solution
Rationale: A hypertonic extracellular solution has a higher
effective solute concentration and draws water out of the cell.
11. The resting membrane potential of a neuron is primarily
influenced by the movement of:
A. Potassium ions
B. Calcium ions only
INTERGRATED APPROACH 8TH EDITION BY
SILVERTHORN COVERING CHAPTER 1-26
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q7A 2027 |INSTANT DOWNLOAD PDF
1. Which statement best describes homeostasis?
A. Maintenance of a completely unchanging internal
environment
B. Maintenance of relatively stable internal conditions despite
external changes
C. Elimination of all variation in physiological processes
D. Prevention of communication between organ systems
Answer: B. Maintenance of relatively stable internal conditions
despite external changes
Rationale: Homeostasis maintains internal conditions within an
appropriate range rather than keeping them absolutely
constant.
2. Which level of organization consists of groups of similar
cells performing a common function?
A. Organ
B. Tissue
C. Organ system
D. Organism
,Answer: B. Tissue
Rationale: A tissue is a group of similar cells organized to
perform a particular function.
3. What is the primary function of a receptor in a homeostatic
control system?
A. Produce a response
B. Detect a change in a regulated variable
C. Store nutrients
D. Eliminate waste
Answer: B. Detect a change in a regulated variable
Rationale: Receptors monitor internal or external conditions
and provide information to the integrating center.
4. Which type of feedback generally stabilizes a physiological
variable?
A. Positive feedback
B. Negative feedback
C. Feedforward amplification
D. Positive inhibition
Answer: B. Negative feedback
Rationale: Negative feedback opposes the initial change and
helps maintain homeostasis.
5. Which organelle is primarily responsible for ATP
production?
A. Lysosome
B. Golgi apparatus
,C. Mitochondrion
D. Nucleus
Answer: C. Mitochondrion
Rationale: Mitochondria generate most cellular ATP through
oxidative metabolism.
6. The plasma membrane is primarily composed of:
A. DNA and RNA
B. Phospholipids and proteins
C. Glycogen and cholesterol only
D. Calcium and phosphate
Answer: B. Phospholipids and proteins
Rationale: The phospholipid bilayer with embedded proteins
forms the basic structure of the plasma membrane.
7. Movement of molecules from an area of higher
concentration to an area of lower concentration is called:
A. Active transport
B. Diffusion
C. Endocytosis
D. Exocytosis
Answer: B. Diffusion
Rationale: Diffusion is passive movement down a concentration
gradient.
8. Which process requires cellular energy in the form of ATP?
A. Simple diffusion
B. Osmosis
, C. Primary active transport
D. Filtration
Answer: C. Primary active transport
Rationale: Primary active transport directly uses ATP to move
substances against their gradients.
9. Osmosis refers specifically to the movement of:
A. Proteins
B. Solutes
C. Water
D. ATP
Answer: C. Water
Rationale: Osmosis is the net movement of water across a
selectively permeable membrane.
10. Which solution would cause a typical cell to lose water?
A. Hypotonic solution
B. Isotonic solution
C. Hypertonic solution
D. Pure water
Answer: C. Hypertonic solution
Rationale: A hypertonic extracellular solution has a higher
effective solute concentration and draws water out of the cell.
11. The resting membrane potential of a neuron is primarily
influenced by the movement of:
A. Potassium ions
B. Calcium ions only
