Memmeler’s Structure and Function of Human Body
Memmeler’s Structure and Function of
Human Body Practice Exam 2026 Edition
100 Advanced Questions with Answers and
Detailed Rationales
Questions 1–25
Question 1
A patient has damage to the plasma membrane causing increased permeability to sodium ions.
Which immediate cellular response is most likely?
A. Hyperpolarization of the membrane
B. Increased ATP synthesis
C. Water enters the cell causing swelling
D. DNA replication accelerates
Answer: C
Rationale:
Excess sodium enters the cell, increasing intracellular osmolarity. Water follows by osmosis,
producing cellular swelling. Persistent swelling may eventually cause cell lysis.
Question 2
Which organelle is primarily responsible for detoxifying drugs in liver cells?
A. Golgi apparatus
B. Rough endoplasmic reticulum
C. Smooth endoplasmic reticulum
D. Lysosome
Answer: C
Rationale:
The smooth ER contains enzymes involved in lipid synthesis and detoxification of medications
and toxins, especially abundant in hepatocytes.
, Memmeler’s Structure and Function of Human Body
Question 3
A patient develops profound muscle weakness after ATP production falls dramatically. Which
cellular process is impaired first?
A. Passive diffusion
B. Osmosis
C. Sodium-potassium pump activity
D. Facilitated diffusion
Answer: C
Rationale:
The Na⁺/K⁺ ATPase requires ATP. Failure causes loss of membrane potential, sodium
accumulation, and eventual cell swelling.
Question 4
Which connective tissue contains abundant elastic fibers allowing repeated stretching?
A. Dense regular connective tissue
B. Elastic connective tissue
C. Hyaline cartilage
D. Fibrocartilage
Answer: B
Rationale:
Elastic connective tissue is found in structures such as large arteries and certain ligaments where
repeated stretching is necessary.
Question 5
Which epithelial tissue is specialized for diffusion in the lungs?
A. Stratified squamous
B. Simple cuboidal
C. Simple squamous
D. Transitional
Answer: C
, Memmeler’s Structure and Function of Human Body
Rationale:
The thin single-cell layer minimizes diffusion distance for oxygen and carbon dioxide exchange.
Question 6
A patient has low blood calcium. Which endocrine gland responds directly?
A. Thyroid
B. Pituitary
C. Parathyroid
D. Adrenal cortex
Answer: C
Rationale:
The parathyroid glands release parathyroid hormone (PTH), increasing blood calcium by acting
on bone, kidneys, and intestines.
Question 7
Which bone cell actively resorbs bone tissue?
A. Osteocyte
B. Osteoblast
C. Osteoclast
D. Chondrocyte
Answer: C
Rationale:
Osteoclasts dissolve mineralized bone matrix during remodeling and calcium regulation.
Question 8
During skeletal muscle contraction, calcium binds directly to:
A. Myosin
B. Troponin
C. Actin
D. ATP
, Memmeler’s Structure and Function of Human Body
Answer: B
Rationale:
Calcium binds troponin, shifting tropomyosin away from actin's binding sites and allowing
cross-bridge formation.
Question 9
A patient has destruction of Schwann cells. Which process is primarily impaired?
A. Neurotransmitter synthesis
B. Myelin formation in the PNS
C. CSF production
D. Synaptic transmission
Answer: B
Rationale:
Schwann cells form myelin around peripheral nerves, greatly increasing conduction velocity.
Question 10
Which part of the neuron receives incoming signals?
A. Axon
B. Myelin sheath
C. Dendrites
D. Axon terminal
Answer: C
Rationale:
Dendrites receive impulses from other neurons and transmit them toward the cell body.
Question 11
Which phase of mitosis separates sister chromatids?
A. Prophase
B. Metaphase
Memmeler’s Structure and Function of
Human Body Practice Exam 2026 Edition
100 Advanced Questions with Answers and
Detailed Rationales
Questions 1–25
Question 1
A patient has damage to the plasma membrane causing increased permeability to sodium ions.
Which immediate cellular response is most likely?
A. Hyperpolarization of the membrane
B. Increased ATP synthesis
C. Water enters the cell causing swelling
D. DNA replication accelerates
Answer: C
Rationale:
Excess sodium enters the cell, increasing intracellular osmolarity. Water follows by osmosis,
producing cellular swelling. Persistent swelling may eventually cause cell lysis.
Question 2
Which organelle is primarily responsible for detoxifying drugs in liver cells?
A. Golgi apparatus
B. Rough endoplasmic reticulum
C. Smooth endoplasmic reticulum
D. Lysosome
Answer: C
Rationale:
The smooth ER contains enzymes involved in lipid synthesis and detoxification of medications
and toxins, especially abundant in hepatocytes.
, Memmeler’s Structure and Function of Human Body
Question 3
A patient develops profound muscle weakness after ATP production falls dramatically. Which
cellular process is impaired first?
A. Passive diffusion
B. Osmosis
C. Sodium-potassium pump activity
D. Facilitated diffusion
Answer: C
Rationale:
The Na⁺/K⁺ ATPase requires ATP. Failure causes loss of membrane potential, sodium
accumulation, and eventual cell swelling.
Question 4
Which connective tissue contains abundant elastic fibers allowing repeated stretching?
A. Dense regular connective tissue
B. Elastic connective tissue
C. Hyaline cartilage
D. Fibrocartilage
Answer: B
Rationale:
Elastic connective tissue is found in structures such as large arteries and certain ligaments where
repeated stretching is necessary.
Question 5
Which epithelial tissue is specialized for diffusion in the lungs?
A. Stratified squamous
B. Simple cuboidal
C. Simple squamous
D. Transitional
Answer: C
, Memmeler’s Structure and Function of Human Body
Rationale:
The thin single-cell layer minimizes diffusion distance for oxygen and carbon dioxide exchange.
Question 6
A patient has low blood calcium. Which endocrine gland responds directly?
A. Thyroid
B. Pituitary
C. Parathyroid
D. Adrenal cortex
Answer: C
Rationale:
The parathyroid glands release parathyroid hormone (PTH), increasing blood calcium by acting
on bone, kidneys, and intestines.
Question 7
Which bone cell actively resorbs bone tissue?
A. Osteocyte
B. Osteoblast
C. Osteoclast
D. Chondrocyte
Answer: C
Rationale:
Osteoclasts dissolve mineralized bone matrix during remodeling and calcium regulation.
Question 8
During skeletal muscle contraction, calcium binds directly to:
A. Myosin
B. Troponin
C. Actin
D. ATP
, Memmeler’s Structure and Function of Human Body
Answer: B
Rationale:
Calcium binds troponin, shifting tropomyosin away from actin's binding sites and allowing
cross-bridge formation.
Question 9
A patient has destruction of Schwann cells. Which process is primarily impaired?
A. Neurotransmitter synthesis
B. Myelin formation in the PNS
C. CSF production
D. Synaptic transmission
Answer: B
Rationale:
Schwann cells form myelin around peripheral nerves, greatly increasing conduction velocity.
Question 10
Which part of the neuron receives incoming signals?
A. Axon
B. Myelin sheath
C. Dendrites
D. Axon terminal
Answer: C
Rationale:
Dendrites receive impulses from other neurons and transmit them toward the cell body.
Question 11
Which phase of mitosis separates sister chromatids?
A. Prophase
B. Metaphase
