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Homeostasis is best described as a static, unchanging state of the internal environment.
Blood flow in the brain changes as blood pressure changes.
Damage to the Sertoli cells would result in the production of antibodies against sperm
cells.
Organs involved in carrying out related functions are grouped into systems.
The osmotic pressure exerted by a cell would decrease if the cell synthesized more
proteins.
Inhibiting the actions of helper T lymphocytes may impair humoral immunity.
Phagocytotic leukocytes involved in the inflammatory response generally do not reenter
system circulation.
A deficiency of dietary iodine would result in excessive TSH secretion.
Decompression sickness could occur if an airplane's cabin depressurized at a high
altitude.
As cardiac muscle is stretched, it contracts less forcibly.
In general, decreased body temperature causes the rate of enzymatic reactions to
decrease.
The pressure of arterial blood is lower than the pressure of venous blood.
Cyclins are a group of proteins which promote different phases of the cell cycle.
The pulmonary veins return oxygen depleted blood to the right atrium.
The lens is clear with no blood because it is made of dead cells.
The arrector pili muscles and ciliary muscles are multi-unit smooth muscles.
The vagus nerve stimulates gastrin secretion during the cephalic phase of gastric
function.
Diabetes mellitus is a disease associated with the inadequate secretion or action of
ADH.
Most motor neurons are multipolar.
The vagus nerve gives rise to preganglionic parasympathetic fibers involved in
regulating most thoracic and abdominal organs.
Elevated secretion of ACTH, as in Addison's disease, causes a darkening of the skin
because ACTH is related to MSH which causes production of the pigment melanin.
Mutating the gene encoding for the H+/K+ ATPase would block gastric HCl secretion.
The Frank-Starling law of the heart describes an intrinsic regulation of stroke volume.
Ovulation occurs around day 14 of the ovarian cycle.
Only about 20% of renal blood is filtered in one pass through the kidneys.
Cells synthesizing large quantities of proteins would have numerous nucleoli.
Tripling blood vessel radius would increase blood flow 64-fold.
The spinal cord begins at the foramen magnum and ends at the hip.
An enzyme-catalyzed reaction in the body at 50C will proceed at a faster rate than at
37C.
Beta interferon is now being used to treat hepatitis B and C.
Alzheimer's disease is associated with the loss of cholinergic fibers that end at the
hippocampus and cerebral cortex.
All body cells have a single, centralized nucleus.
A renin secreting tumor would induce hypertension.
ORT is based on understanding transport mechanisms and junctional complexes.
Individuals consuming diets containing omega-3 fatty acids are less likely to develop
cardiovascular disease.
Light energy will cause all-trans retinal to convert to the 11-cis form which dissociates
from opsin to eventually create the nerve impulse.
Contraction of ciliary muscles allows the lens to become thicker.
Ca2+ must bind to tropomyosin so that the myosin binding sites on actin will be
accessible to the myosin.
Since water follows the reabsorption of Na+ in the proximal tubule, the filtrate is
isomotic with the blood.
How much of the blood glucose does the brain use when a person is at rest?
A.30%
B.40%
C.60%
D.80%
_________ AV node block occurs when no atrial waves can pass through the AV node.
A.First-degree
B.Second-degree
C.Third-degree
D.Fourth-degree
What process is needed to return a membrane to its resting membrane potential with all
ions in the correct locations?
A. after-hyperpolarization
B. all-or-none-law
C. Na+/K+ pump
D. refractory period
What hormone is most important for maintaining blood glucose levels during the
post-absorptive or fasting states?
A.insulin
B.glucagon
C.somatostatin
D.thyroxine
The secretion of gonadotropins (FSH and LH) will ___________ during menopause.
A.increase
B.decrease
C.remain the same
The endocrine regulation of blood glucose concentration is an example of a(n)
A.antagonistic effector.
B.positive feedback loop.
C.negative feedback loop.
D.Both antagonistic effector and negative feedback loop are correct.
The backbone of a DNA molecule is a chain of
A.alternating deoxyribose sugar and phosphate.
B.alternating phosphate and nitrogen.
C.alternating nitrogenous bases.
D.alternating deoxyribose and ribose sugars.
_________ is characterized by parallel losses of mineral and organic matrix from bone.
A.Osteomalacia
B.Rickets
C.Osteoporosis
D.Osteitis deformans (Paget's disease)
Otoliths are associated with the
A. crista ampullaris.
B. cupula.
C. macula.
D. semicircular canals.
Growth due to increased cell size is called
A.hypertrophy.
B.hyperplasia.
C.atrophy.
D.dystrophy.
The conversion of short-term memory to long-term memory is called
A. memory ablation.
B. memory consolidation.
C. memory recognition.
D. memory translation.
Bright light would stimulate regulation of pupil diameter through _____________
nerves.
A.sympathetic
B.parasympathetic
C.somatic
D.sensory
The form of hemoglobin with iron in a reduced state and bonded to carbon monoxide is
A.oxyhemoglobin.
B.deoxyhemoglobin.
C.methemoglobin.
D.carboxyhemoglobin.
Which of the following subatomic particles have negligible mass?
A. electrons
B. neutrons
C. protons
D. Both neutrons and protons.
This organ contains cells that are haploid:
A.the testis
B.the liver
C.the lung
D.the heart
The hyposecretion of glucocorticoids and mineralocorticoids results in
A.Addison's disease.
B.diabetes insipidus.
C.Grave's disease.
D.Cushing's disease.
______________ cells normally produce ATP exclusively by anaerobic respiration
metabolism.
A.Red blood
B.White blood
C.Skin
D.Nerve
Which of the following is NOT a section of the small intestine?
A.ileum
B.cecum
C.jejunum
D.duodenum
Which of the following is NOT a function of the stomach?
A.store food
B.kill bacteria
C.digestion of most foods
D.move chyme into the duodenum
Specialized unicellular glands found in columnar and pseudostratified columnar
epithelium that secrete mucus are
A.cilia.
B.keratin.
C.transitional cells.
D.goblet cells.
What is the function of the hypothalamo-hypophyseal tract?
A. transports releasing hormones from the hypothalamus to the anterior pituitary
B. transports nerve impulse from the hypothalamus to the anterior pituitary
C. transports hormones and nerve impulses from the hypothalamus to the posterior
pituitary
D. All apply.
Lipolysis and gluconeogenesis are stimulated when
A.insulin and glucagon are both decreasing.
B.insulin and glucagon are both increasing.
C.insulin is increasing and glucagon is decreasing.
D.insulin is decreasing and glucagon is increasing.
Muscarinic ACh receptors act through ____________ activation of K+ channels.
A. cGMP
B. G-protein
C. M-protein
D. ATP
The return of molecules from the tubules to the blood is called as
A. reabsorption.
B. secretion.
C. filtration.
D. autoregulation.
The prime mover of any skeletal movement is called the
A.flexor.
B.agonist.
C.abductor.
D.antagonist.
Mutation of the calmodulin gene would alter the ability of ____________ to act as a
second messenger.
A.calcium
B.sodium
C.potassium
D.cAMP
Which of the following is NOT one of the three main parts of a neuron?
A.dendrites
B.cell body
C.neurofibrils
D.axon
Jaundice caused by the bile duct blocked by gallstones is created by high blood levels
of
A.free bilirubin.
B.urobilinogen.
C.conjugated bilirubin.
D.None of the choices are correct.
As age increases, the maximum cardiac rate will
A.increase.
B.decrease.
C.remain unchanged.
Allergic reactions could be minimized if the synthesis of immunoglobulin
_____________ was blocked.
A.IgA
B.IgM
C.IgE
D.IgD
Which blood vessels have the lowest pressure?
A.veins
B.arterioles
C.venules
D.capillaries
The ___________________________ are branches made from the myelinated
preganglionic sympathetic axons that go from the spinal nerves to sympathetic ganglia
chain.
A.dorsal rami
B.ventral rami
C.white rami communicantes
D.gray rami communicantes
