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1) an epiphyseal line is an example of a
a) gomphosis.
b) synchondrosis.
c) synostosis.
d) symphysis.
e) syndesmosis.
2) a primary spermatocyte matures into ________ spermatids having ________
chromosomes.
a) millions of; 46
b) four; 23
c) one; 46
d) millions of; 23
e) four; 46
3)
figure 20-1 the heart
identify the structure labeled "6"
a) cusp of tricuspid valve
b) pulmonary semilunar valve
c) aortic semilunar valve
d) bicuspid valve
e) ligamentum arteriosum
4) during the menses
a) progesterone levels are high.
b) a new uterine lining is formed.
c) secretory glands and blood vessels develop in the endometrium.
d) the old functional layer is sloughed off.
e) the corpus luteum is most active.
5) the first blood vessels to branch from the aorta are the ________ arteries.
a) pulmonary
b) coronary
c) circumflex
d) carotid
e) subclavian
6) in cardiac muscle
a) calcium ions are not released from the sarcoplasmic reticulum.
b) calcium ions do not bind to troponin molecules.
c) calcium ions play no role in the process of contraction.
d) about 20 percent of the calcium ion required for contraction comes from outside the
cell.
e) calcium ions play an important role in repolarizing the membrane after the
depolarization phase.
7) ganglionic neurons in the suprarenal gland
a) are located in the suprarenal cortex.
b) release acetylcholine into blood capillaries.
c) release epinephrine into blood capillaries.
d) have no known function.
e) are modified and can't release neurotransmitters.
8) a herniated intervertebral disc is caused by
a) loss of annulus fibrosis elasticity.
b) slippage of the fibrocartilage disc.
c) ossification of the vertebral disc.
d) protrusion of the nucleus pulposus.
e) transformation of fibrocartilage to hyaline cartilage.
9) "an increase in end-diastolic volume increases the stroke volume" is a way of stating
a) robin's law of the heart.
b) finch's law of the heart.
c) starling's law of the heart.
d) sparrow's law of the heart.
e) hawking's law of the heart.
10) which of these descriptions best matches the term gastrin?
a) where pancreatic juice and bile enter duodenum
b) carries absorbed sugars and amino acids
c) stimulates pancreas to secrete bicarbonate-rich fluid
d) causes gallbladder to contract
e) stimulates gastric secretion
11) the ________ of each spinal nerve innervates the skin and muscles of the back.
a) white ramus communicantes
b) gray ramus communicantes
c) dorsal ramus
d) ventral ramus
e) dermatome
12) boyle's law states that the pressure of a gas is:
a) inversely proportional to volume of its container.
b) always higher in the atmosphere than in the lungs.
c) directly proportional to temperature.
d) inversely proportional to temperature.
e) directly proportional to the volume of its container.
13) the control of calcitonin excretion is an example of direct ________ regulation.
a) endocrine
b) pancreatic
c) homeostatic
d) hepatic
e) vascular
14) put the following steps of bone repair in correct sequence:
1. cartilage in the external callus is replaced by bone.
2. a hematoma occurs.
3. an internal callus forms at the site of injury.
4. osteoclasts remodel the bone at the site of repair.
a) 1, 2, 3, 4
b) 2, 1, 3, 4
c) 3, 1, 4, 2
d) 4, 2, 3, 1
e) 2, 3, 1, 4
15) the pancreatic hormone that causes blood sugar to enter its target cells is
a) somatotropin.
b) cortisol.
c) insulin.
d) glucagon.
e) erythropoietin.
16) a neuron with nicotinic receptors is exposed to acetylcholine. this will lead to
a) activation of chemically-gated ion channels.
b) excitation of the neuron.
c) entry of sodium ions into the neuron.
d) depolarization of the neuron.
e) all of the answers are correct.
17) reflexes based on synapses formed during development are ________ reflexes.
a) visceral
b) innate
c) acquired
d) somatic
e) vegetative
18) which of the following factors would increase the amount of oxygen discharged by
hemoglobin to peripheral tissues?
a) decreased temperature
b) decreased ph
c) increased tissue po2
d) decreased amounts of dpg
e) all of the answers are correct.
