1) the presence of a recessive gene can be detected (seen) only if the individual is
a) homozygous recessive.
b) heterozygous dominant.
c) heterozygous recessive.
d) homozygous dominant.
e) epistatic recessive.
2) cells that engulf bacteria or cell debris within loose connective tissue are
a) fibroblasts.
b) macrophages.
c) adipocytes.
d) mast cells.
e) melanocytes.
3) most of the middle layer in the heart wall is composed of
a) cardiac muscle cells.
b) chondrocytes.
c) epitheliocytes.
d) fibrocytes.
e) smooth muscle cells.
4) the following is a list of the steps that occur in the production of an auditory
sensation.
1. the pressure wave distorts the basilar membrane on its way to the round window.
2. movement of the tympanic membrane causes displacement of the malleus.
3. displacement of the stereocilia stimulates sensory neurons of the cochlear nerve.
4. movement of the malleus causes movement of the incus and stapes.
5. distortion of the basilar membrane forces the hair cells of the organ of corti toward or
away from the tectorial membrane.
6. movement of the oval window establishes pressure waves in the perilymph of the
vestibular duct.
the proper sequence for these steps is
a) 2, 4, 1, 6, 5, 3.
b) 2, 4, 6, 3, 5, 1.
c) 2, 1, 4, 6, 5, 3.
d) 2, 4, 6, 1, 5, 3.
e) 2, 5, 4, 6, 1, 3.
5) a postsynaptic neuron will have an excitatory postsynaptic potential (epsp) when
a) chemically-regulated potassium channels are open and potassium is diffusing out of
the cell.
b) more calcium ions than usual diffuse into the neuron.
c) chemically-regulated sodium channels are open and sodium is diffusing into the cell.
d) the neuron is hyperpolarized.
e) more potassium ions than usual diffuse out of the neuron.
6) which of the following statements about simple epithelia is false?
a) they afford little mechanical protection.
b) they are characteristic of regions where secretion or absorption occurs.
c) they line internal compartments and passageways.
d) they cover surfaces subjected to mechanical or chemical stress.
e) they are avascular.
7) a chemical that minimizes changes in the ph of a body fluid by releasing or binding
hydrogen ion is called a(n)
a) electrolyte.
b) acid.
c) alkali.
d) compensation.
e) buffer.
8) the ________ of the radius helps stabilize the wrist joint.
a) olecranon process
b) coronoid process
c) styloid process
d) radial tuberosity
e) capitulum
9) the common iliac artery is an example of which type of artery?
a) arteriolar
b) elastic
c) connective
d) muscular
e) vascular
10) a) what are the similarities between facilitated diffusion and active transport? b)
what are the differences?
11) which of these is true about the atrial reflex?
a) also called bainbridge reflex
b) triggered by atrial mechanoreceptors
c) triggered by increasing venous return
d) depends on sympathetic innervation
e) all of the answers are correct.
12) when the epiphyseal plate is replaced by bone,
a) puberty begins.
b) interstitial bone growth begins.
c) appositional bone growth begins.
d) long bones have reached their adult length.
e) the bone becomes more brittle.
13) the process of glycogen formation is known as ________.
14) genes that appear on the x chromosome are said to be ________.
15) a fracture of the bone across its long axis is called a(n) ________ fracture.
16) the potential difference across the cell membrane is known as the ________.
17) why is regional infection or inflammation of the skin usually very painful?
18) the ________ allow for a wide range of head movements.
19) in bone, the calcium phosphate forms crystals of ________.
20) the amount of blood remaining in the ventricle when the semilunar valve closes is
the ________.