PNB 2274 EXAM I PRACTICE QUESTIONS &
ANSWERS
The elbow is _____ to the wrist
A. Lateral
B. Medial
C. Distal
D. Proximal - answers :d. Proximal
Your body temperature rises, this ______ is sensed by _____ and in response
information is carried by ________ to activate the secretion of sweat
A. Set point; receptors; the efferent pathway
B. Stimulus; receptors; the efferent pathway
C. Stimulus; the brain; the afferent pathway
D. Set point; receptors; effectors
E. Feedback; the brain; receptors - answers :b. Stimulus; receptors; the efferent
pathway
Adipose tissue is different than a tendon due to:
A. The unique combo of proteins present in the ecm
B. The degree of cellularity
C. Increased ground substance in the matrix
D. All of the above - answers :d. All of the above
The major categories of tissue are:
A. Nervous, musculoskeletal, epithelial, blood
B. Blood, bone, muscle, nervous
C. Muscle, nervous, connective, epithelial
D. Skin, neuromuscular, organ, collagen - answers :c. Muscle, nervous, connective,
epithelial
A tear in the blood vessel that exposures collagen to blood activates platelets to
become sticky and secrete chemical signals, which cause more platelets to become
sticky and secrete the same chemical signals. This is an example of _____ control
A. Closed loop, negative feedback
B. Closed loop, positive feedback
C. Feed-forward
D. Open-loop, positive feedback - answers :b. Closed loop, positive feedback
A cell is taken out of he body and placed into a test solution. The concentration of solute
x in the test solution is 100mm, and the concentration of solute x inside the cell is
,200mm. The cell membrane is permeable to water but not solute x. Which of the
following statements is/are true?
A. There is a net flux of water out of the cell
B. The test solution is hypertonic
C. There is a flux of water molecules into and out of the cell
D. All of the above - answers :c. There is a flux of water molecules into and out of the
cell
Which is not a connective tissue cell
A. Bone cells
B. Skeletal muscle
C. Cartilage cells
D. Fat cells
E. Blood cells - answers :b. Skeletal muscle
Which is not a feature of connective tissue?
A. Protein fibers in the matrix
B. Glycosaminoglycan molecules in the matrix
C. Cells
D. Apical surface - answers :d. Apical surface
The most abundant tissue within the body is:
A. Muscle
B. Connective tissue
C. Nervous tissue
D. Epithelial tissue - answers :b. Connective tissue
Which of the following situations best represents a homeostatic mechanism?
A. A person who becomes very nervous begins to sweat
B. After going outside on a hot day, the core body temp rises
C. After eating large batch of salt popcorn, levels of salt in the urine increase
D. As age increases, the amount of calcium in bones tend to decrease
E. All of the above - answers :c. After eating large batch of salt popcorn, levels of salt in
the urine increase
One of the contributing factor to the onset of cerebrovascular disease is a loss of
electrical and chemical communication between adjacent neurons and glial cells inside
the brain. One potential therapeutic approach might be to design a drug that increases
the expression of:
A. Desmosomes
, B. Tight junctions
C. Gap junctions.
D. Adherens junctions
E. Mechanically gated ion channels - answers :c. Gap junctions
______ control systems can cause "anticipatory" changes in the body before any
change in blood levels of a regulated variable
A. Closed or open loop; negative feedback
B. Closed loop, negative feedback
C. Open loop
D. Closed loop, positive feedback - answers :c. Open loop
Which of the following tissues are avascular?
A. Cartilage
B. Bone
C. Both
D. Neither - answers :a. Cartilage
The bacteria responsible for food poisoning secrete a toxin that breaks down
intercellular junction between cells in your digestive system, allowing them to enter your
tissues and make you sick. This toxin should allow the bacteria to enter
A. Transcelluarly
B. Paracellularly
C. Both of the above
D. None of the above - answers :b. Paracellularly
Epithelial cells that are optimized for diffusion are most likely
A. Simple columnar
B. Simple squamous
C. Transitional epithelum
D. Stratified epithelium
E. Pseudostratified epithelium - answers :b. Simple squamous
Which of the following is an example of a structure/function relationship
A. The random coil conformation of the protein elastin give elastic fibers the property of
extensibility
B. Dense regular connective tissue forming ligaments has tensile strength due to the
cross-linked, triple helix structure of collagen
C. Mineralized matrix in bone gives it the ability to resist compressive forces
D. All of the above - answers :d. All of the above
ANSWERS
The elbow is _____ to the wrist
A. Lateral
B. Medial
C. Distal
D. Proximal - answers :d. Proximal
Your body temperature rises, this ______ is sensed by _____ and in response
information is carried by ________ to activate the secretion of sweat
A. Set point; receptors; the efferent pathway
B. Stimulus; receptors; the efferent pathway
C. Stimulus; the brain; the afferent pathway
D. Set point; receptors; effectors
E. Feedback; the brain; receptors - answers :b. Stimulus; receptors; the efferent
pathway
Adipose tissue is different than a tendon due to:
A. The unique combo of proteins present in the ecm
B. The degree of cellularity
C. Increased ground substance in the matrix
D. All of the above - answers :d. All of the above
The major categories of tissue are:
A. Nervous, musculoskeletal, epithelial, blood
B. Blood, bone, muscle, nervous
C. Muscle, nervous, connective, epithelial
D. Skin, neuromuscular, organ, collagen - answers :c. Muscle, nervous, connective,
epithelial
A tear in the blood vessel that exposures collagen to blood activates platelets to
become sticky and secrete chemical signals, which cause more platelets to become
sticky and secrete the same chemical signals. This is an example of _____ control
A. Closed loop, negative feedback
B. Closed loop, positive feedback
C. Feed-forward
D. Open-loop, positive feedback - answers :b. Closed loop, positive feedback
A cell is taken out of he body and placed into a test solution. The concentration of solute
x in the test solution is 100mm, and the concentration of solute x inside the cell is
,200mm. The cell membrane is permeable to water but not solute x. Which of the
following statements is/are true?
A. There is a net flux of water out of the cell
B. The test solution is hypertonic
C. There is a flux of water molecules into and out of the cell
D. All of the above - answers :c. There is a flux of water molecules into and out of the
cell
Which is not a connective tissue cell
A. Bone cells
B. Skeletal muscle
C. Cartilage cells
D. Fat cells
E. Blood cells - answers :b. Skeletal muscle
Which is not a feature of connective tissue?
A. Protein fibers in the matrix
B. Glycosaminoglycan molecules in the matrix
C. Cells
D. Apical surface - answers :d. Apical surface
The most abundant tissue within the body is:
A. Muscle
B. Connective tissue
C. Nervous tissue
D. Epithelial tissue - answers :b. Connective tissue
Which of the following situations best represents a homeostatic mechanism?
A. A person who becomes very nervous begins to sweat
B. After going outside on a hot day, the core body temp rises
C. After eating large batch of salt popcorn, levels of salt in the urine increase
D. As age increases, the amount of calcium in bones tend to decrease
E. All of the above - answers :c. After eating large batch of salt popcorn, levels of salt in
the urine increase
One of the contributing factor to the onset of cerebrovascular disease is a loss of
electrical and chemical communication between adjacent neurons and glial cells inside
the brain. One potential therapeutic approach might be to design a drug that increases
the expression of:
A. Desmosomes
, B. Tight junctions
C. Gap junctions.
D. Adherens junctions
E. Mechanically gated ion channels - answers :c. Gap junctions
______ control systems can cause "anticipatory" changes in the body before any
change in blood levels of a regulated variable
A. Closed or open loop; negative feedback
B. Closed loop, negative feedback
C. Open loop
D. Closed loop, positive feedback - answers :c. Open loop
Which of the following tissues are avascular?
A. Cartilage
B. Bone
C. Both
D. Neither - answers :a. Cartilage
The bacteria responsible for food poisoning secrete a toxin that breaks down
intercellular junction between cells in your digestive system, allowing them to enter your
tissues and make you sick. This toxin should allow the bacteria to enter
A. Transcelluarly
B. Paracellularly
C. Both of the above
D. None of the above - answers :b. Paracellularly
Epithelial cells that are optimized for diffusion are most likely
A. Simple columnar
B. Simple squamous
C. Transitional epithelum
D. Stratified epithelium
E. Pseudostratified epithelium - answers :b. Simple squamous
Which of the following is an example of a structure/function relationship
A. The random coil conformation of the protein elastin give elastic fibers the property of
extensibility
B. Dense regular connective tissue forming ligaments has tensile strength due to the
cross-linked, triple helix structure of collagen
C. Mineralized matrix in bone gives it the ability to resist compressive forces
D. All of the above - answers :d. All of the above
