1. Kinesin is a retrograde MAP: a. true b. false 2. Cilia are motile cytoplasmic
ID: 89598 • Letter: 1
Question
1. Kinesin is a retrograde MAP:
a.
true
b.
false
2. Cilia are motile cytoplasmic projections supported by:
a.
microfilaments
c.
actin filaments
b.
intermediate filaments
d.
microtubules
3. Which of the following is incorrect regarding body cavities and membranes:
a.
there are three serous membrane-bound cavities in the thoracic cavity
c.
the peritoneal cavity contains the abdominal cavity and the pelvic cavity
b.
the parietal pericardial membrane is in physical contact with mediastinum
d.
mesenteries are a double layer of visceral peritoneum
4. Which of the following is true of parturition (child labor):
a.
oxytocin is the feed-forward information
c.
the afferent information is carried via blood vessels
b.
the receptors in the cervix are mechanically-gated ion channels
d.
oxytocin stimulates the cervix to contract
5. Which of the following elements makes up the greatest percentage of the human body by weight:
a.
carbon
c.
hydrogen
b.
oxygen
d.
nitrogen
6. The Na+ / K+ ATPase:
a.
pumps three sodium ions intracellularly for every two potassium ions it pumps extracellularly
c.
pumps three sodium ions extracellularly for every two potassium ions it pumps intracellularly
b.
pumps three potassium ions intracellularly for every two sodium ions it pumps extracellularly
d.
pumps three potassium ions extracellularly for every two sodium ions it pumps intracellularly
7. The majority of total body water is found in the:
a.
heart and vasculature
c.
kidneys and bladder
b.
interstitial compartment
d.
intracellular compartment
8. In deoxyribonucleic acid, adenine and guanine are bonded together via a(n):
a.
phosphodiester bond
c.
hydrogen bond
b.
glycosidic bond
d.
peptide bond
9. All of the following are true of a cell that is hypotonic to its solution EXCEPT:
a.
the intracellular fluid has less dissolved solutes than the extracellular fluid
c.
the extracellular fluid has a lower osmotic potential
b.
specific molecules will leave the cell via aquaporins
d.
the cell will crenate
10. Secondary-active transport:
a.
is the mechanism by which glucose is absorbed in most body cells (except the intestine)
c.
uses a potential energy of sodium ions that exists extracellularly
b.
directly uses the energy of ATP to translocate Na+ and glucose
d.
is an antiport mechanism
11. Vasodilating in response to a marked increase in ambient temperature is an example of:
a.
negative feedback
c.
positive feedback
b.
feed-forward
d.
bird-feed
12. The majority of the R-groups of a peripheral membrane protein are:
a.
polar
c.
isotonic
b.
hydrophobic
d.
amphipathic
a.
true
b.
false
Explanation / Answer
Answer 1. True
Because kinesin protein is the motor protein found in eukaryotes. It moves with the help of microtubule filaments.
Answer 2. Microtubule
Cilia are small finger like projections supported by microtubule.
Answer 3. Option (B)
The parietal pericardial membrane is in physical contact with mediastinum.
Answer 4. Option (B)
The receptors in the cervix are mechanically-gated ion channels
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