1) active sites on the actin become available for binding after
a) actin binds to troponin.
b) troponin binds to tropomyosin.
c) calcium binds to troponin.
d) calcium binds to tropomyosin.
e) myosin binds to troponin.
2) changes in blood osmotic pressure would most affect the secretion of
a) acth.
b) adh.
c) oxytocin.
d) tsh.
e) lh.
3) the citric acid cycle
a) begins with the formation of a molecule of citric acid.
b) directly produces most of the atp from the catabolism of glucose.
c) consumes two moles of carbon dioxide.
d) contains enzymes called cytochromes.
e) forms acetyl-coa from glucose-6-phosphate.
4)
figure 24-1 the stomach (dissected)
what is the function of the structure labeled “6”?
a) strains materials entering the stomach
b) regulates gastric emptying
c) mixes stomach juice into food
d) controls contraction of stomach muscles
e) prevents food from entering the esophagus
5)
figure 10-1 skeletal muscle fiber
where are the myosin molecules located?
a) 4
b) 5
c) 6
d) 7
e) 8
6) muscles with fibers that run perpendicular to the long axis of the body are called
a) lateralis.
b) transversus.
c) rectus.
d) oblique.
e) medialis.
7) based on the motor homunculus, which of the following body regions has the largest
motor units?
a) tongue
b) face
c) hands
d) back
e) larynx
8)
figure 8-4 bones of the ankle and foot
identify the bone labeled “1”
a) talus
b) calcaneus
c) cuneiform v
d) cuboid
e) metatarsal
9) each of the following statements concerning sebaceous glands and sebum is true,
except one. identify the exception.
a) most sebaceous glands are coiled tubular glands.
b) most sebaceous glands open into hair follicles.
c) sebum functions to lubricate the hair and skin.
d) sebum can function as an antibiotic.
e) acne involves inflammation of sebaceous glands.
10) inadequate iodine in the diet may lead to
a) hypothyroidism.
b) cretinism.
c) myxedema.
d) high blood levels of tsh.
e) all of the answers are correct.
11) the region known as the primitive streak is the site of
a) migration of mesodermal cells to form the endoderm.
b) endoderm formation.
c) ectoderm formation.
d) migration of ectodermal cells to form the mesoderm.
e) amnion formation.
12)
figure 24-2 the wall of the small intestine
the structure labeled “5”
a) contributes to the mesentery of the small intestine.
b) has a simple squamous epithelium.
c) is part of the visceral peritoneum.
d) is called the serosa.
e) all of the answers are correct.