Cell & Bond Quiz
Preview:
The first step in fatty acid synthesis involves:
A. Acetyl CoA Carboxylase
B. Beta-Hydroxyl CoA Hydrogenase
C. Acetyl Dehydrogenase
D. Pyruvate kinase
The greatest pressure decrease in the circulation occurs across the arterioles because
A. they have the greatest surface area
B. the velocity of blood flow through them is the highest
C. the velocity of blood flow through them is the lowest
D. they have the greatest resistance
Selective destruction of the zona glomerulosa of the adrenal cortex would produce a deficiency of which hormone?
A. Aldosterone
B. Androstenedione
C. Cortisol
D. Dehydroepiandrosterone
Substrate level phosphorylation is by:
A. Pyruvate kinase
B. Phosphofructokinase
C. Hexokinase
D. ATP Synthase
Which of the following substances has the highest renal clearance?
A. Para-aminohippuric acid (PAH)
B. Inulin
C. Glucose
D. Na+
Cholecystokinin (CCK) inhibits
A. gastric emptying
B. pancreatic HCO3– secretion
C. pancreatic enzyme secretion
D. contraction of the gallbladder
Which of the following is true during inspiration?
A. Intrapleural pressure is positive
B. The volume in the lungs is less than the functional residual capacity(FRC)
C. Alveolar pressure equals atmospheric pressure
D. Intrapleural pressure is more negative than it is during expiration
The correct temporal sequence for events at the neuromuscular junction is
A. action potential in the motor nerve;
depolarization of the muscle end plate;
uptake of Ca2+ into the presynaptic nerve terminal
B. uptake of Ca2+ into the presynaptic terminal;
release of acetylcholine (ACh);
depolarization of the muscle end plate
C. release of ACh;
action potential in the motor nerve;
action potential in the muscle
D. uptake of Ca2+ into the motor end plate;
action potential in the motor end plate;
action potential in the muscle
During exercise, total peripheral resistance (TPR) decreases because of the effect of
A. the sympathetic nervous system on splanchnic arterioles
B. the parasympathetic nervous system on skeletal muscle arterioles
C. local metabolites on skeletal muscle arterioles
D. local metabolites on cerebral arterioles
Cutting which structure causes blindness in the temporal fields of the left and right eyes?
A. Optic nerve
B. Optic chiasm
C. Optic tract
D. Geniculocalcarine tract
Which of the following causes increased aldosterone secretion?
A. Decreased blood volume
B. Administration of an inhibitor of angiotensin-converting enzyme (ACE)
C. Hyperosmolarity
D. Hypokalemia
Which of the following groups of proteins assist in the folding of other proteins?
A. Proteases
B. Proteosomes
C. Templates
D. Chaperones
Which of the following characteristics is shared by simple and facilitated diffusion of glucose?
A. Occurs down an electrochemical gradient
B. Is saturable
C. Requires metabolic energy
D. Is inhibited by the presence of galactose
Shine-Dalgarno sequence in bacterial mRNA is near:
A. AUG codon
B. UAA codon
C. UAG codon
D. UGA codon
Severe thiamine deficiency is associated with:
A. Decreased RBC transketolase activity
B. Increased clotting time
C. Decreased RBC transaminase activity
D. Increased xanthurenic acid excretion
