A fresh set of 20 random questions is generated every time you open this page and every time you refresh it.For each of the following multiple choice questions, choose the most appropriate answer :
1. In which of the following conditions is a long acting analog of somatostatin of therapeutic value?
A. Acute mesenteric ischemia
B. Bleeding from esophageal varices
D. Pancreatic exocrine insufficiency
2. The major protein that transports iron in the plasma from the site of absorption to cells engaged in erythropoiesis is:
3. The cerebellum receives sensory input from the:
D. All these
4. Muscle fibers differ from "typical cells" in that muscle fibers
A. Lack a cell membrane.
B. Have many nuclei.
C. Are very small.
D. Lack mitochondria.
5. The crossed extensor response is seen in:
A. Healthy humans
B. The phase of spinal shock
C. Chronic paraplegia
D. None of these
6. Which of the following statements about synaptic potentials is incorrect?
A. They are analogous to generator potentials and end-plate potentials.
B. IPSP hyperpolarize the postsynaptic neuron.
C. They undergo spatiotemporal summation.
D. They are propagated down the postsynaptic neuron.
7. In terms of serum estradiol (E) and progesterone (P), and inhibin, the induction of the preovulatory LH surge is associated with which of the following?
A. High E and low P
B. High E, high P, and high inhibin B
C. Low E and low P
D. Low E and high P
8. Joint position sense is transmitted by:
A. Anterior spinothalamic tract
B. Lateral spinothalamic tract
C. Dorsal column-medial lemniscal system
D. All these
9. The largest known axons are found in:
10. If intracellular and extracellular calcium are 2 millimoles per liter and 100 nanomoles per liter, the ratio of intracellular and extracellular calcium is approximately:
11. Righting reflexes are integrated for the most part in the:
C. Spinal cord
D. Cerebral cortex
12. Which of the following is not a feature of lower motor neuron lesions?
A. Muscle atrophy
13. Histamine released from mast cells in the stomach stimulates the secretion of HCl by parietal cells. What type of signaling is this?
14. No matter where a particular sensory pathway is stimulated along its course to the cortex, the conscious sensation produced is referred to the location of the receptor - That is:
A. Muller's law of specific nerve energies
B. Bell-Magendie Law
C. Weber-Fechner law
D. The law of projection
15. Which of the following is a potent stimulator of insulin secretion?
C. Glucagon like polypeptide-1 (GLP-1)
16. In healthy humans, the maximal rate of glucose absorption from the intestine is estimated to be about:
A. 10 g/hour
B. 40 g/hour
C. 120 g/hour
D. 180 g/hour
17. Which of the following transporters is present only in the sinusoidal membrane of hepatocytes?
A. MDR 3 (Flippase)
B. Bile Salt Export Pump
C. Multidrug Resistance associated Protein - 2 (MRP-2)
D. LDL-cholesterol receptors
18. An example for multi-unit (nonsyncytial) smooth muscle is:
B. Uterine myometrium
19. The cell membrane of skeletal muscle is called the
D. Sarcoplasmic reticulum.
20. Neuron C responds to stimulation of neuron A with a propagated action potential only when neuron B (which terminates only on neuron C) is also simultaneously stimulated. Which of the following inferences is justified?
A. The neurotransmitter released by neuron A opens K channels in neuron C.
B. Neuron B releases an excitatory neurotransmitter.
C. Neuron C releases glycine.
D. The synapse between A and C is axosomatic.
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