When calcium ion binds to troponin,
A) tropomyosin rolls away from the active site.
B) active sites on the myosin are exposed.
C) actin heads will bind to myosin.
D) muscle relaxation occurs.
E) myosin shortens.
The cardioacceleratory center activates sympathetic neurons and the cardioinhibitory
center controls parasympathetic neurons.
A) The first part of the statement is true but the second part is false.
B) The first part of the statement is false but the second part is true.
C) Both parts of the statement are true.
D) Both parts of the statement are false.
E) The first part is always true, but the second part is sometimes true.
Jane has Type A blood; therefore, she
A) has antibodies to B agglutinogens.
B) can give blood to other people with Type A blood only.
C) can receive blood from other people with Type A blood only.
D) makes anti-A without ever having been exposed to Type A blood.
E) has B antigen on her RBCs.
The outward projections from the central gray matter of the spinal cord, seen easily in
microscopic spinal cord cross sections, are called
A) wings.
B) horns.
C) pyramids.
D) fibers.
E) tracts.
When the arm is straight, which structure accepts the olecranon?
Figure 8-2 The Humerus
A) 1
B) 3
C) 4
D) 8
E) 9
________ form elaborate capillary networks within tissues that allow for very slow
blood flow.
A) Varicosities
B) Sinusoids
C) Foramina
D) Portal systems
E) Perfusion centers
Identify the structure labeled “3.”
Figure 8-3 The Femur
A) greater trochanter
B) lesser trochanter
C) head
D) lateral epicondyle
E) lateral condyle
________ is the percentage of individuals with a particular genotype that actually show
the “expected” phenotype.
A) Blending
B) Penetrance
C) Codominance
D) Genome imprinting
E) Pangenesis
When light encounters a medium of different density, it is
A) refracted.
B) diffracted.
C) reflected.
D) angled.
E) absorbed.
Color blindness is a(n)
A) hereditary disease involving a lack of certain cones.
B) nutritional disease related to a deficiency of vitamin A.
C) progressive deterioration of the ganglion cells of the retina.
D) inflammatory reaction causing damage to the photoreceptors.
E) infection of the retina, resulting in destruction of the cones.
The blood vessel that supplies blood to the liver, stomach, and spleen is the
A) celiac artery.
B) inferior mesenteric vein.
C) hepatic portal vein.
D) gastric vein.
E) superior mesenteric artery.
Autonomic disorders would not cause
A) excessive perspiration.
B) appetite.
C) sexual arousal.
D) problems in maintenance of blood pressure.
E) problems related to skeletal muscle function.
The ________ is a layer of smooth muscle in the skin of the scrotal sac.
A) rete testis
B) dartos
C) bulbourethral
D) cremaster
E) prepuce
The ________ receives blood from the adrenal gland.
A) inferior vena cava
B) renal vein
C) adrenal vein
D) perirenal vein
E) hepatic portal vein
Figure 23-2 Mechanics of Ventilation
What is the relationship between the pressures at label “8”?
A) P outside = P inside
B) P outside > P inside
C) P outside < P inside
D) P outside + P inside
E) P outside – P inside
The ________ provides mechanical protection, nutritional support, and waste removal
for the developing embryo.
A) uterus
B) ovary
C) vagina
D) stroma
E) corpus albicans
Figure 21-2 Veins
Identify the vein labeled “6.”
A) inferior vena cava
B) common iliac
C) internal iliac
D) external iliac
E) femoral
The layer of the epidermis that contains abundant desmosomes is the stratum
A) corneum.
B) lucidum.
C) basale.
D) granulosum.
E) spinosum.
Identify the structure labeled “2.”
Figure 8-3 The Femur
A) greater trochanter
B) linea aspera
C) head
D) lateral epicondyle
E) lateral condyle
Identify the structure labeled “6.”
A) uterus
B) vagina
C) cervix
D) clitoris
E) greater vestibular gland