1) the plasma membrane is permeable to _________, but impermeable to ___________.
a. nutrients; wastes
b. proteins; nutrients
c. phosphates; wastes
d. nutrients; proteins
e. wastes; nutrients
2) which of the following fractures would be the least likely to cause a spinal cord
injury?
a. a fracture of vertebra c2
b. a fracture of vertebra c6
c. a fracture of vertebra t5
d. a fracture of vertebra t12
e. a fracture of vertebra l4
3) which of the following is not a feature that almost all connective tissues have in
common?
a. most cells are not in direct contact with each other.
b. ground substance is so scarce that it is not visible with a light microscope.
c. cells usually occupy less space than the extracellular material.
d. protein fibers are usually present in the ground substance.
4) from superficial to deep, the meninges occur in which order?
a. dura mater, pia mater, arachnoid
b. dura mater, arachnoid, pia mater
c. pia mater, dura mater, arachnoid
d. pia mater, arachnoid, dura mater
e. arachnoid, pia mater, dura mater
5) the process of engagingmore motor units to increase the strength of a muscle
contraction is called __________.
a. wave summation
b. recruitment
c. temporal summation
d. incomplete tetanus
e. complete tetanus
6) which of the following enzymes in an rbc breaks h2co3 down to water and carbon
dioxide?
a. hemoglobinase
b. carboxyhemoglobinase
c. carbonic anhydrase
d. bisphosphoglycerase
e. carbaminoreductase
7) the average person has approximately __________ nephrons per kidney.
a. 1.2 million
b. 2.4 million
c. 3.6 million
d. 4.8 million
e. 5.6 million
8) which of the following describes the duplicity theory of vision?
a. a single type of receptor system cannot produce both high sensitivity and high
resolution.
b. cones and rods are responsible for both photopic (day) vision as well as trichromatic
(color) vision.
c. cones are responsible for both photopic (day) vision as well as trichromatic (color)
vision.
d. light adaptation and dark adaptation are adjustments in vision to changing light
intensities.
e. there are short-wavelength cones and long-wavelength cones.
9) the proximal radioulnar joint is a __________ joint.
a. ball-and-socket
b. saddle
c. hinge
d. pivot
e. condylar
10) which of the following is not a function of the muscular system?
a. stability
b. heat production
c. control of openings
d. secretion
e. breathing
11) when a woman is giving birth, the head of the baby pushes against her cervix and
stimulates therelease of the hormone oxytocin. oxytocin travels in the blood and
stimulates the uterus to contract. labor contractions become more and more intense until
the baby is expelled. this is an example of __________.
a. negative feedback
b. positive feedback
c. dynamic equilibrium
d. integration control
e. set point adjustment
12) a normal hematocrit is __________ of the total blood volume.
a. less than 1%
b. 47% to 63%
c. 25% to 37%
d. 42% to 45%
e. 37% to 52%
13) as you are lifting a box, someone places extra weight on top of it. for your muscle
to continue contracting and lifting the box, the muscle must __________.
a. recruit more muscle fibers
b. lower its threshold
c. reduce its wave summation
d. shift from isometric to isotonic contraction
e. shift from slow-twitch to fast-twitch mode
14) which of the following contains overlapping thick and thin filaments?
a. a band
b. h band
c. i band
d. m line
e. z discs