Anatomy & Physiology Straighterline
What is the smallest level of organization in the body that contains the body's genetic information?
a. chemical
b. cellular
c. tissue
d. organism ANS: cellular The cellular level includes the nucleus, an organelle that contains the body's
genetic information.
Which is an example of a normally occurring positive-feedback mechanism?
Select one:
a. elevated blood pressure during exercise
b. increase in heart rate after blood loss
c. decrease in blood pressure after blood loss
d. stretching of the uterus near the end of pregnancy ANS: d. stretching of the uterus near the end of
pregnancy
Which of the following processes generates the most ATP within a human cell?
Select one:
a. glycolysis
b. lactic acid fermentation
c. oxidative phosphorylation
d. citric acid cycle ANS: c. oxidative phosphorylation
,During DNA replication, how does each template strand eventually become two identical DNA
molecules?
Select one:
a. The two strands form continuously, catalyzed by DNA polymerase.
b. The two strands form continuously, catalyzed by DNA ligase.
c. One strand forms continuously, the other forms in short segments spliced by DNA polymerase.
d. One strand forms continuously, the other forms in short segments spliced by DNA ligase. ANS: d. One
strand forms continuously, the other forms in short segments spliced by DNA ligase. There is a leading
strand and a lagging strand; they don't both form continuously.
Which is the most superficial layer of skin that is composed primarily of living cells?
Select one:
a. stratum corneum
b. stratum lucidum
c. stratum basale spinosum.
d. stratum spinosum ANS: .
d. stratum spinosum (stratum basale layer is below the stratum spinosum)
Which of the following is the definition of a third degree burn?
Select one:
a. a burn that covers at least 25% of the skin
b. a burn that has destroyed the dermis and epidermis
c. a burn that can only be caused by fire
,d. a burn that does not leave scars ANS: a burn that has destroyed the dermis and epidermis. How much
skin the burn covers does not definite which degree of burn it is.
Which of the following types of openings in the skeletal system does a "sinus" describe?
Select one:
a. cavity
b. cleft
c. hole
d. tunnel ANS: a. cavity: a sinus is an air space within bone.
Which of the following components of the bone matrix, when removed, allows the bone to be easily
shattered?
Select one:
a. cartilage
b. collagen
c. hydroxyapatite
d. mineral ANS: b. Collagen is a component of the bone matrix that gives it flexible strength so it is less
brittle.
Which of the following is the most widely distributed type of muscle in the body?
Select one:
a. cardiac
b. postural
c. skeletal
, d. smooth ANS: d. smooth
Which sentence best describes the sliding filament model of muscle contraction?
Select one:
a. Actin and myosin filaments remain stationary.
b. Actin and myosin myofilaments shorten.
c. Sarcomeres and myofibrils contract.
d. Sarcomeres and myofibrils lengthen. ANS: c. Sarcomeres and myofibrils contract. The shortening of
sarcomeres is responsible for contraction, and thus myofibrils (sarcomeres joined end to end) also
shorten
A doctor performing an autopsy on a patient concludes that part of the brain was likely damaged by
trauma due to a large population of which type of cell?
Select one:
a. Schwann cells
b. microglia
c. oligodendrocytes
d. ependymal cells ANS: b. microglia
What type of axons is found in a gray ramus comunicans?
Select one:
a. myelinated, pre-ganglionic axons
b. myelinated, post-ganglionic axons
c. unmyelinated, pre-ganglionic axons
What is the smallest level of organization in the body that contains the body's genetic information?
a. chemical
b. cellular
c. tissue
d. organism ANS: cellular The cellular level includes the nucleus, an organelle that contains the body's
genetic information.
Which is an example of a normally occurring positive-feedback mechanism?
Select one:
a. elevated blood pressure during exercise
b. increase in heart rate after blood loss
c. decrease in blood pressure after blood loss
d. stretching of the uterus near the end of pregnancy ANS: d. stretching of the uterus near the end of
pregnancy
Which of the following processes generates the most ATP within a human cell?
Select one:
a. glycolysis
b. lactic acid fermentation
c. oxidative phosphorylation
d. citric acid cycle ANS: c. oxidative phosphorylation
,During DNA replication, how does each template strand eventually become two identical DNA
molecules?
Select one:
a. The two strands form continuously, catalyzed by DNA polymerase.
b. The two strands form continuously, catalyzed by DNA ligase.
c. One strand forms continuously, the other forms in short segments spliced by DNA polymerase.
d. One strand forms continuously, the other forms in short segments spliced by DNA ligase. ANS: d. One
strand forms continuously, the other forms in short segments spliced by DNA ligase. There is a leading
strand and a lagging strand; they don't both form continuously.
Which is the most superficial layer of skin that is composed primarily of living cells?
Select one:
a. stratum corneum
b. stratum lucidum
c. stratum basale spinosum.
d. stratum spinosum ANS: .
d. stratum spinosum (stratum basale layer is below the stratum spinosum)
Which of the following is the definition of a third degree burn?
Select one:
a. a burn that covers at least 25% of the skin
b. a burn that has destroyed the dermis and epidermis
c. a burn that can only be caused by fire
,d. a burn that does not leave scars ANS: a burn that has destroyed the dermis and epidermis. How much
skin the burn covers does not definite which degree of burn it is.
Which of the following types of openings in the skeletal system does a "sinus" describe?
Select one:
a. cavity
b. cleft
c. hole
d. tunnel ANS: a. cavity: a sinus is an air space within bone.
Which of the following components of the bone matrix, when removed, allows the bone to be easily
shattered?
Select one:
a. cartilage
b. collagen
c. hydroxyapatite
d. mineral ANS: b. Collagen is a component of the bone matrix that gives it flexible strength so it is less
brittle.
Which of the following is the most widely distributed type of muscle in the body?
Select one:
a. cardiac
b. postural
c. skeletal
, d. smooth ANS: d. smooth
Which sentence best describes the sliding filament model of muscle contraction?
Select one:
a. Actin and myosin filaments remain stationary.
b. Actin and myosin myofilaments shorten.
c. Sarcomeres and myofibrils contract.
d. Sarcomeres and myofibrils lengthen. ANS: c. Sarcomeres and myofibrils contract. The shortening of
sarcomeres is responsible for contraction, and thus myofibrils (sarcomeres joined end to end) also
shorten
A doctor performing an autopsy on a patient concludes that part of the brain was likely damaged by
trauma due to a large population of which type of cell?
Select one:
a. Schwann cells
b. microglia
c. oligodendrocytes
d. ependymal cells ANS: b. microglia
What type of axons is found in a gray ramus comunicans?
Select one:
a. myelinated, pre-ganglionic axons
b. myelinated, post-ganglionic axons
c. unmyelinated, pre-ganglionic axons
