1) atrial hypertrophy would probably cause an enlarged p wave on an
electrocardiogram.
2) na+-k+ atpase is a countertransport antiport carrier, which always requires energy.
3) sustentacular cells secrete inhibin, which regulates the rate of sperm production.
4) the fenestrated endothelium of the capillary has pores small enough to exclude blood
cells from the filtrate.
5) light falling on the retina is absorbed by rhodopsin and photopsin in the pigment
epithelium.
6) the frontal plane passes vertically through the body or an organ and divides it into
equal right and left portions.
7) a vertebra is considered an irregular bone.
8) blood filtered through the hepatic sinusoids exits the liver via the hepatic veins.
9) incompatibility of one person’s blood with another results from the action of plasma
antibodies against the rbcs’ antigens.
10) sperm must travel to the distal end of the uterine tube to encounter the egg before it
dies.
11) the sarcoplasmic reticulum is the smooth endoplasmic reticulumof a muscle fiber.
12) a buffer system converts a weak acid or base into a strong one.
13) fibrous joints are joints, at which two bones are united by hyaline cartilage.
14) in a normal ecg, the deflection that is generated by ventricular repolarization is
called the __________.
a. r wave
b. qrs wave
c. p wave
d. s wave
e. t wave
15) loss of equilibrium and motor coordination would most likely be related to a lesion
in which structure?
a. limbic system
b. pons
c. pituitary gland
d. medulla oblongata
e. cerebellum
16) the thalamus, hypothalamus, and epithalamus are derivatives of which embryonic
structure?
a. telencephalon
b. diencephalon
c. mesencephalon
d. metencephalon
e. myelencephalon
17) the __________ secrete(s) __________, which promotes na+ and water retention.
a. adrenal medulla; epinephrine
b. pancreas; cortisol
c. kidneys; corticosterone
d. adrenal cortex; aldosterone
e. thyroid; calcitonin
18) what is the longest vein commonly used in grafts in coronary bypass surgery?
a. inferior vena cava
b. femoral vein
c. deep femoral vein
d. great saphenous vein
e. common iliac vein
19) during the absolute refractory period which of the following is true?
a. if a neuron reaches threshold, the action potential goes to completion.
b. the neuron fires at its maximum voltage if a stimulus depolarizes the neuron to
threshold.
c. the signal grows weaker with distance.
d. it is possible to trigger a new action potential, but only with an unusually strong
stimulus.
e. no stimulus of any strength will trigger a new action potential.
20) what is the earliest sign of puberty in girls?
a. the onset of breast development
b. the appearance of pubic and axillary hair
c. the appearance of sebaceous and axillary glands
d. the first menstrual period
e. the increase in muscle mass
21) if a neuron is prevented from sending a neurotransmitter across a synapse to another
cell, which neuron property is being inhibited?
a. secretion
b. excitability
c. conductivity
d. permeability
22) which of the following bones is a single unpaired bone?
a. ethmoid
b. parietal
c. maxilla
d. zygomatic
e. palatine
23) the __________ is an embryonic membrane that serves as the origin of the first
blood and germ cells.
a. yolk sac
b. allantois
c. chorion
d. amnion
e. placenta
24) rapid diffusion of oxygen and carbon dioxide through the air sacs (alveoli) of the
lungs takes place through __________ epithelium.
a. simple squamous
b. simple cuboidal
c. simple columnar
d. keratinized stratified squamous
e. nonkeratinized stratified squamous
25) which of the following does not contribute to the sense of equilibrium?
a. otolithic membrane
b. semicircular canals
c. saccule
d. utricle
e. vallate papillae
26) autonomic nervous system fibers are involved in all of the following except
__________.
a. changing the diameter of the pupil
b. adjusting heart rate and force
c. altering salivary mucus secretion
d. regulating gastrointestinal motility
e. maintaining tonicity of the muscles of the neck
27) the infundibulum is a ___________.
a. mass of endocrine and neural cells
b. portal system between the hypothalamus and the pituitary gland
c. bulky nucleus composed of the paraventricular nucleus and the supraoptic nucleus
d. depression of the sphenoid bone that protects the pituitary gland
e. projection of the hypothalamus from which the pituitary gland hangs
28) the __________ cavity is inferior to the _____________ cavity.
a. cranial; thoracic
b. thoracic; abdominopelvic
c. pericardial; pleural
d. thoracic; peritoneal
e. thoracic; cranial
29) what structure leads from each ovary to the uterus?
a.uterine tube
b.vagina
c.urethra
d.vas deferens
e.copulatory duct
30) changes called male climacteric are a consequence of a(n)__________.
a.increased secretion of estrogens
b.increased secretion of progesterone
c.decreased secretion of testosterone
d.increased secretion of fsh and lh
e.increased secretion of gnrh