1) a receptor protein in the plasma membrane will not bind to just any chemical in the
extracellular fluid, but only to certain ones. this property is called _________.
a. selectivity
b. specificity
c. efficacy
d. saturation
e. fidelity
2) where is the vasomotor center located?
a. hypothalamus
b. medulla oblongata
c. spinal cord
d. cerebellum
e. cerebral cortex
3) which muscle is innervated by the tibial nerve?
a. extensor digitorum longus
b. tibialis anterior
c. semimembranosus
d. fibularis longus
e. vastus lateralis
4) what event causes rhodopsin to gofrom violet to clear in color?
a. cis-retinal straightens to become trans-retinal
b. cis-retinal bends to become trans-retinal
c. trans-retinal straightens to become cis-retinal
d. trans-retinal bends to become cis-retinal
5) which one of the following best describes the order of a visceral reflex?
a. sensory receptor -> interneuron -> afferent nerve fiber -> efferent nerve fiber ->
gland
b. sensory receptor -> efferent nerve fiber -> interneuron -> afferent nerve fiber ->
gland
c. sensory receptor -> afferent nerve fiber -> interneuron -> efferent nerve fiber ->
gland
d. sensory receptor -> efferent nerve fiber -> afferent nerve fiber -> interneuron ->
gland
e. sensory receptor -> interneuron -> efferent nerve fiber -> afferent nerve fiber ->
gland
6) in humans, normal chewing involves ___________ and __________of the mandible.
a. protraction; retraction
b. opposition; reposition
c. elevation; pronation
d. elevation; depression
e. supination; depression
7) during coagulation, which of the following is found in the extrinsic mechanism only?
a. calcium
b. prothrombin activator
c. prothrombin
d. thromboplastin
e. thrombin
8) germ cells have __________ unpaired chromosomes and are thus called __________
cells.
a. 23; somatic
b. 23; haploid
c. 23; diploid
d. 46; somatic
e. 46; diploid
9) of the following components of bile, only __________ has/have a digestive function.
a. bile salts
b. bilirubin
c. cholesterol
d. phospholipids
e. neutral fats
10) what is the normal ph of tissue fluid?
a. 6.95-7.05
b. 7.05-7.15
c. 7.15-7.25
d. 7.25-7.35
e. 7.35-7.45
11) the oil of your scalp is secreted by __________ glands associated with the hair
follicles.
a. merocrine sweat
b. apocrine sweat
c. sebaceous
d. ceruminous
e. eccrine sweat
12) the flexor (withdrawal) reflex employs a ___________, which maintains a sustained
contraction.
a. parallel after-discharge circuit
b. diverging circuit
c. converging circuit
d. closed circuit
e. reverberating circuit