Straighterline Anatomy & Physiology with correct answers and explanation

Straighterline Anatomy Final,
Straighterline Anatomy & Physiology
with correct answers and explanation
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 - correct answers-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 - correct answers-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 - correct answers-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. - correct answers-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 - correct answers-.
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 - correct answers-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 - correct answers-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 - correct answers-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 - correct answers-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. - correct answers-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 - correct answers-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
d. unmyelinated, post-ganglionic axons - correct answers-d. unmyelinated, post-
ganglionic axons

Which class of chemical messengers is secreted by neurons into synaptic clefts to
activate an adjacent cell?

Select one:
a. autocrine
b. endocrine
c. neurotransmitter
d. paracrine - correct answers-c. neurotransmitter Neurotransmitters are secreted into a
synaptic cleft by presynaptic nerve terminals.

The targeted response of the hormone lipotropin is an increase in which of the
following?

Select one:
a. the breakdown of fat in adipose tissues
b. the breakdown of lipids and release of fatty acids from cells This is caused by release
of growth hormone.
c. the production of milk in lactating women
d. the secretion of thyroid hormone - correct answers-a. the breakdown of fat in adipose
tissues

, What causes the breakdown of lipids and release of fatty acids from cells? - correct
answers-The release of growth hormones.

There are more microbial cells than human cells in your body and the health of this
microbiota clearly influences human well-being. How many microbes are there?.

Select one:
a. For every cell in your body, there are ten microbial cells.
b. For every cell in your body, there are one hundred microbial cells.
c. For every cell in your body, there are one thousand microbial cells.
d. For every cell in your body, there are ten thousand microbial cells - correct answers-
a. For every cell in your body, there are ten microbial cells.

The study of the body's organization by areas is

Select one:
a. systemic anatomy.
b. regional anatomy.
c. molecular biology.
d. microbiology.
e. surface anatomy. - correct answers-b. regional anatomy.

The popliteal region is the

Select one:
a. calf.
b. armpit.
c. hollow behind the knee.
d. neck.
e. thigh. - correct answers-c. hollow behind the knee.

Deep means

Select one:
a. toward the middle or midline of the body.
b. away from the surface.
c. closer to the head.
d. closer than another structure to the point of attachment to the trunk.
e. toward the back of the body. - correct answers-b. away from the surface.

The gluteal region is commonly known as the

Select one:
a. groin.
b. buttock.