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____________ is an acetylcholinesterase antagonist used to treat myasthenia gravis.
A. Neostigmine
B. Muscarine
C. Naloxone
D. Nitric oxide
What ion is released by the fertilized egg that prevents polyspermy?
A.Na+
B.K+
C.Cl--
D.Ca2+
Within the blood vessels, valves are found in the
A.arteries.
B.capillaries.
C.arterioles.
D.veins.
Which of the following is NOT a touch or pressure cutaneous receptor?
A. Golgi Corpuscle
B. Pacinian Corpuscle
C. Merkel's Disk
D. Meissner's Corpuscle
The Ca2+ required for skeletal muscle contraction
A. is released from the sarcoplasmic reticulum.
B. enters the cell due to the opening of voltage regulated Ca2+ channels from the T
tubules.
C. is actively transported into the cell.
D. is released from mitochondria.
Who's law states that the total pressure of a gas mixture is equal to the sum of the
pressures that each gas in the mixture would exert independently?
A. Boyle's Law
B. Charles Law
C. Dalton's Law
D. Henry's Law
Which of the following is NOT a part of the female reproductive system?
A.ductus deferens
B.uterus
C.labia majora
D.uterine tube
Coactivation of alpha and gamma motoneurons is stimulated by ______________
neurons.
A.upper motor
B.lower motor
C.intermotor
D.sensory
What type of antigens are present in Type O blood?
A.A only
B.B only
C.both A and B
D.neither A nor B
Hypotension would induce __________ of afferent arterioles.
A.constriction
B.dilation
C.no change
Which tunic of the GI tract is vascular and has many nerves and glands?
A. mucosa
B. submucosa
C. muscularis
D. serosa
What chemical change occurs to histones that will turn on genetic transcription?
A. acetylation
B. acidification
C. phosphorylation
D. differentiation
Some ganglion cells of the retina contain _______ that is sensitive to luminance and
helps the hypothalamus regulate circadian rhythms.
A.melatonin
B.melanopsin
C.retinal
D.photopsin
Angiotensin-converting enzyme is mostly present in the capillaries of the
A.liver.
B.kidneys.
C.lungs.
D.adrenal medulla.
The _____________ of the messenger RNA is recognized by the _____________ of the
transfer RNA.
A. triplet, codon
B. codon, anticodon
C. anticodon, codon
D. anticodon, triplet
In an acidic solution,
A.the OH- ion concentration is greater than the H+ ion concentration.
B.the OH- ion concentration is less than the H+ ion concentration.
C.the H+ ion concentration is equal to the OH- ion concentration.
D.the H+ ion concentration is less than the OH- ion concentration only if the solution is
buffered.
What is the role of ATP in muscle contraction and relaxation?
A. It is hydrolyzed from themyosin head to attach to actin.
B. It causes myosin head to detach from actin.
C. It powers the Ca2+ pumps to return Ca2+ to the SR.
D. All apply.
Which of the following is NOT an example of an exocrine gland?
A.mucous gland that secretes onto respiratory passages
B.sweat gland that secretes onto the skin
C.salivary gland that secretes into the mouth
D.testes cells that secrete testosterone into the blood
Which of the following is NOT a response of the body to stress?
A. increased secretion of ACTH
B. increased secretion of glucocorticoids
C. increased immune response
D. increased secretion of epinephrine and norepinephrine
Which of the following is the correct neural pathway for hearing?
A. vestibulocochlear nerve, inferior colliculus, medulla oblongata, thalamus, temporal
lobe
B. vestibulocochlear nerve, medulla oblongata, inferior colliculus, thalamus, temporal
lobe
C. vestibulocochlear nerve, thalamus, inferior colliculus, medulla oblongata, temporal
lobe
D. None apply.
Vitamin B12 is primarily absorbed in the
A.duodenum.
B.jejunum.
C.ileum.
D.cecum.
Which of the following is involved in specific immunity?
A.mucus
B.macrophages
C.neutrophils
D.lymphocytes
Which of the following is NOT classified as a catecholamine?
A. norepinephrine
B. epinephrine
C. histamine
D. dopamine
Which of the following is NOT one of the three types of RNA?
A.dRNA
B.tRNA
C.rRNA
D.mRNA
Where do autonomic preganglionic neurons originate?
A. midbrain
B. hindbrain
C. thoracic and sacral regions of the spinal cord
D. All apply.
The transport of amino acids across epithelial membranes requires the
A. Na+/K+ pump.
B. Ca2+ pump.
C. Na+/H+ pump.
D. facilitated diffusion.
Proprioception and pressure impulses are carried by large, _______ neurons in the
______ columns of the spinal cord and are ____.
A.myelinated, ventral, contralateral
B.unmyelinated, lateral, ipsilateral
C.myelinated, dorsal, ipsilateral
D.unmyelinated, dorsal, contralateral
What are the areas of antigens that stimulate production of various antibodies called?
A.haptens
B.lymphokines
C.antigenic determinant sites
D.complement binding sites
Ova are fertilized in the
A.cervix.
B.fallopian tubes.
C.uterus.
D.vagina.
Neural stem cells from the subventricular zone are important in the renewal of _______
neurons.
A. visual
B. gustatory
C. olfactory
D. auditory
2,3-DPG comes from
A.aerobic respiration in red blood cells.
B.anaerobic respiration in red blood cells.
C.type II alveolar cells.
D.tissues with high amounts of oxygen.
Acetyl CoA is
A.generated from oxaloacetate.
B.generated from pyruvic acid.
C.generated from citric acid.
D.generated from water.
In the fetus, blood can flow from the right atrium to the left atrium through the
A.tricuspid valve.
B.ductus arteriosus.
C.foramen ovale.
D.ductus venosus.
A decrease in temperature will shift the oxygen dissociation curve to the
A.right.
B.left.
C.will not shift the curve.
Presentation of a foreign antigen to a killer T lymphocytes requires a
A.Class-1 MHC molecule and coreceptor CD8.
B.Class-1 MHC molecule and coreceptor CD4.
C.Class-2 MHC molecule and coreceptor CD8.
D.Class-2 MHC molecule and coreceptor CD4.
