Which of the following is NOT a molecule of the electron transport system?
A.coenzyme Q
B.coenzyme A
C.flavin mononucleotide (FMN)
D.cytochrome b
In a complete AV node block,
A.no signals pass into the ventricles.
B.the atria will be paced by the SA node.
C.the ventricles contract due to the Purkinje fiber pacemaker.
D.All of the choices are correct.
Which of the following is NOT true of isotopes of a given atom?
A. have the same number of neutrons
B. have the same number of protons
C. have different atomic masses
D. All apply.
Huntington’s disease is characterized by a dominant defective gene on chromosome
A. 2.
B. 4.
C. 19.
D. 21.
Loss of DNA sequences at the ends of chromosomes in the ________ region may cause
cell senescence.
A.centromere
B.telomere
C.mitotic
D.anticodon
The swellings on postganglionic axons that contain neurotransmitter are called
A.synaptic bulbs.
B.axon terminals.
C.varicosities.
D.neuromuscular junctions.
A fertilized egg is called a(n)
A.zygote.
B.blastocyst.
C.morula.
D.embryo.
Damage to which of the following neurons would impair micturition?
A. parasympathetic neurons
B. sympathetic neurons
C. pudendal somatic motor neurons
D. All of the choices are correct.
A six-sided organic molecule with alternating double bonds is termed a(n)
A.aromatic compound.
B.ketone.
C.alcohol.
D.organic acid.
Which of the following is NOT true of oxidative stress?
A.protects from development of type 2 diabetes mellitus.
B.contributes to aging and degenerative diseases associated with aging.
C.promotes the malignant growth of cancers.
D.contributes to all inflammatory diseases.
______ molecules aid in the folding of a polypeptide chain into its tertiary structure.
A. Spliceosome
B. Ubiquitin
C. Centrosome
D. Chaperone
The pH of a solution increases as the _______________ ion concentration decreases.
A.hydrogen
B.hydroxide
C.bicarbonate
D.sodium
Decompression sickness is caused by ascending to sea level too quickly which results in
bubbles of _____ to form in the blood.
A.oxygen
B.carbon dioxide
C.carbon monoxide
D.nitrogen
During ______________ sleep, dreams that can be recalled are most likely to occur.
A.REM
B.deep
C.nonREM
D.dozing
Which of the following is true of fast oxidative, Type IIA muscle fibers?
A. many capillaries
B. anaerobic
C. low myoglobin content
D. small diameter
The possibility of an individual developing ischemic heart disease
A.is decreased by increasing exercise.
B.is increased by stopping smoking.
C.is decreased by diets containing 50% fat.
D.is increased by diets low in saturated fat.
Which of the following will decrease the affinity of hemoglobin for oxygen?
A.decreased pH, decreased temperature, or decreased 2,3-DPG
B.decreased pH, increased temperature, or increased 2,3-DPG
C.increased pH, increased temperature, or decreased 2,3-DPG
D.increased pH, decreased temperature, or increased 2,3-DPG
Which of the following is true of the auditory tube?
A.It is a passageway from the middle ear to the oropharynx.
B.It is usually collapsed.
C.It opens due to the action of the tensor tympani muscle.
D.Both it is usually collapsed and it opens due to the action of the tensor tympani
muscle.
A common visual impairment in older people that is caused by damage to the central
fovea is
A.geniculostriatum.
B.retinitis pigmentosa.
C.macular degeneration.
D.bleaching.
Actions of interferons include
A.stimulation of fever.
B.inhibition of cytotoxic T cells.
C.inhibition of antibody production.
D.inhibition of cell division.
Some tumor cells may produce a surface molecule, which may defend them from T cell
attack. These surface molecules are called
A.FAS ligands.
B.MHCs.
C.CD8 coreceptors.
D.antigens.
Abnormal T cell response results in delayed hypersensitivity with the secretion of
A.histamine.
B.lymphokines.
C.interleukin.
D.antibodies.
Free energy is ______________ when exergonic reactions proceed.
A.increased
B.decreased
C.unchanged
The pumps that actively transport calcium back into the _______ are called Ca2+
-ATPase pumps.
A. transverse tubules
B. sarcoplasmic reticulum
C. neuromuscular junction
D. None apply.
Which of the following is NOT a type of connective tissue?
A.blood
B.cartilage
C.neuroglia
D.bone
Destruction of the embryonic ____________ will prevent formation of the nervous
system.
A.ectoderm
B.mesoderm
C.endoderm
D.mesoglia
Normal venous PO2 is
A.40 mm Hg.
B.46 mm Hg.
C.85 mm Hg.
D.100 mm Hg.
Increased maternal lipolysis is stimulated by the secretion of ___________ by the
placenta.
A.human chorionic gonadotropin
B.chorionic somatomammotropin
C.progesterone
D.estrogen
Blood within the umbilical ___________ contain(s) high concentrations of fetal waste
products.
A.arteries
B.veins
C.capillaries
The volume of blood in the ventricles at the end of diastole is known as the
A.after-load.
B.pre-diastolic volume (PDV).
C.stroke volume (SV).
D.end-diastolic volume (EDV).
Uncontrolled type I diabetes mellitus
A.results in hypertension.
B.induces metabolic acidosis.
C.increases brain glucose utilization.
D.decreases hepatic ketogenesis.
Crossing over occurs during
A.anaphase I of meiosis.
B.metaphase of mitosis.
C.prophase I of meiosis.
D.metaphase II of meiosis.
Hydrostatic pressure is ______ and colloid osmotic pressure is ______ at the arterial
end of a capillary.
A.higher, higher
B.higher, lower
C.lower, lower
D.lower, higher
Which of the following is NOT true of axonal transport?
A. uses molecular motors
B. can transport anterograde or retrograde
C. has one fast and two slow components
D. is a passive process