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Insulin promotes cellular uptake of glucose by inserting these channels into plasma
membranes.
A.uncoupling protein
B.glucagon
C.Glut4
D.leptin
A cell which is actively involved in the detoxification of chemicals would contain large
quantities of
A.ribosomes.
B.mitochondria.
C.peroxisomes.
D.rough endoplasmic reticulum.
Ion channels that open in response to depolarization are called
A. ion-gated channels.
B. voltage-gated channels.
C. stimulation-gated channels.
D. potential-gated channels.
Pulmonary circulation is a ____ resistance and ____ pressure pathway.
A.low, high
B.low, low
C.high, low
D.high, high
Cells which contain large numbers of mitochondria and large amounts of
agranular(smooth) endoplasmic reticulum are most likely
A. bladder cells.
B. bone cells.
C. lung cells.
D. skeletal muscle cells.
Which of the following is NOT true of the relaxation of a muscle fiber?
A. ATP is needed to fuel the calcium pumps
B. calcium release channels close
C. the action potential must continue
D. Ca2+ moves from the sarcoplasm to the sarcoplasmic reticula
What is the normal value of arterial percent hemoglobin saturation?
A.100%
B.97%
C.90%
D.86%
For a theory to be scientific and accepted, it must be based on
A.reproducible data.
B.blind faith.
C.a single hypothesis.
D.the word of a professional scientist.
The gap of exposed axon in the myelin sheath is the
A. neurilemma.
B. node of Ranvier.
C. sheath of Schwann.
D. white matter.
The ability of a cell to give rise to an entire organism if implanted in a uterus is termed
as
A. totipotent.
B. multipotent.
C. pluripotent.
D. reproductive cloning.
The osmotic pressure of a solution is directly related to its ___________ concentration.
A. water
B. solute
C. solvent
D. matrix
Changes in blood volume are detected by
A.osmoreceptors in hypothalamus.
B.stretch receptors in the atria.
C.cells in the proximal convoluted tubule.
D.osmoreceptors in the medulla.
Which of the following is used to map neuronal activity with scalp electrodes?
A.MEG
B.PET
C.EEG
D.MRI
The first successful vaccination with an attenuated virus was conducted by
A.Jenner.
B.Pasteur.
C.Einstein.
D.Newton.
Hydration spheres can be formed by compounds which contain _______________
bonds.
A. nonpolar covalent
B. polar covalent
C. ionic
D. either polar covalent or ionic
Movement of water out of the large intestine is by
A.active transport.
B.cotransport.
C.osmosis.
D.All of the choices are correct.
What structures allow H+ to diffuse back across the inner mitochondrial membrane to
the matrix?
A.cytochromes
B.coenzyme Q
C.respiratory assemblies
D.NADH
The glucose carrier of skeletal muscle is designated as
A. GLUT2.
B. GLUTSk.
C. GLUT4.
D. GLUT5.
Where is the G-protein complex when a regulatory molecule is not bound to its
receptor?
A. The alpha subunit is attached to the inner surface of the receptor.
B. The three subunits are together but not attached to the inner surface of the receptor.
C. The three subunits are together AND attached to the inner surface of the receptor.
D. The beta and gamma subunits are attached to the inner surface of the receptor.
The primary function of the large intestine is
A.water and electrolyte reabsorption.
B.mineral absorption.
C.hormone degradation.
D.degrading toxins.
Tendons are composed of
A.adipose tissue.
B.dense regular fibrous connective tissue.
C.dense irregular fibrous connective tissue.
D.loose connective tissue.
Mutation of the N-methyl-D-aspartate (NMDA) receptor would affect the ability of
____________ to regulate neural function.
A. acetylcholine
B. epinephrine
C. glutamate
D. nitric oxide
The stomach churns food into a pasty material is called
A. a bolus.
B. chyme.
C. chyle.
D. saliva.
The parasympathetic division of the autonomic nervous system
A.utilizes norepinephrine as a postganglionic neurotransmitter.
B.has a relatively short preganglionic neuron.
C.utilizes acetylcholine as a preganglionic neurotransmitter.
D.includes the adrenal medulla.
The ___________________ is the dorsal diencephalon, containing the choroid plexus
and the pineal gland.
A. epithalamus
B. hypothalamus
C. thalamus
D. third ventricle
The ventilation/perfusion ratio is ________ at the apex of the lungs.
A.highest
B.lowest
C.the same as the base
Normal venous PCO2 is
A.40 mm Hg.
B.46 mm Hg.
C.100 mm Hg.
D.105 mm Hg.
What is present at the axon hillock that allows the production of action potentials?
A. voltage-gated channels
B. ligand-gated channels
C. muscarinic receptors
D. chemical-gated channels
Which hormone has no effect on blood glucose levels?
A.insulin
B.thyroid hormone
C.growth hormone
D.epinephrine
A lack of vitamin D
A.stimulates increased calcitonin secretion.
B.causes osteomalacia in children.
C.decreases absorption of dietary calcium.
D.inhibits PTH secretion.
A common reducing agent used to couple chemical reactions in cells is
A.riboflavin.
B.niacin.
C.NADH.
D.FAD.
Since veins can distend more with pressure, they are called _____ vessels.
A.resistance
B.stretchy.
C.capacitance.
D.Both resistance and stretchy are correct.
Which of the following is NOT a symptom of Addison's disease?
A.skin discoloration (bronzing)
B.hyperglycemia
C.hypotension
D.sodium and potassium imbalances
Hemoglobin F
A.has a lower affinity for oxygen than hemoglobin A.
B.contains two alpha and two gamma chains.
C.binds large amounts of 2,3-DPG.
D.is increased in sickle-cell anemia.
