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. Which of the following is not detectable in the blood of a nonpregnant female?
A. Oxytocin
B. Relaxin
C. hCS
D. Inhibin B
2. Which of the following is a bile acid synthesized by the hepatocyte?
A. Sodium taurocholate
B. Chenodeoxycholic acid
C. Deoxycholic acid
D. Lithocholic acid
3. The most frequent type of movement in the small intestine in the digestive state is:
A. peristalsis
B. antiperistalsis
C. slow wave
D. segmentation contraction
4. Which of the following cells in the CNS is primarily involved in the reuptake of excitatory neurotransmitters released by neurons?
A. Astroglial cell
B. Microglial cell
C. Oligodendroglial cell
D. Ependymal cell
5. In which of the following would the ratio of motor neurons to muscle fibers be the greatest?
A. large muscles of the upper arms
B. postural muscles of the back
C. muscles that control the eye
D. leg muscles
6. The cytoplasm of a skeletal muscle fiber is called the
A. Sarcolemma.
B. Sarcomere.
C. Sarcosome.
D. Sarcoplasm
7. The lipolytic effect of catecholamines is mediated by:
A. ß1 adrenergic receptors
B. ß2 adrenergic receptors
C. ß3 adrenergic receptors
D. ß1 & ß3 adrenergic receptors
8. Receptors for acetylcholine are located on the
A. Synaptic knob.
B. Motor end plate.
C. Sarcomere.
D. Synaptic cleft.
9. Which area is uniquely concerned with color vision?
A. V1
B. V3
C. LO
D. V8
10. Which of the following characteristics is unique to skeletal muscle and is not observed in normal cardiac muscle?
A. Gradation of force production
B. Refractoriness
C. Staircase phenomenon
D. Tetanizability
11. Which of the following events in postsynaptic neuronal membrane underlie inhibitory postsynaptic potentials? Opening of:
A. Na channels
B. Ca channels
C. Cl channels
D. All these
12. Which of the following is true about measurement of blood pressure?
A. The length of the bladder in the blood pressure cuff should cover more than 80% of the arm area
B. The person should be comfortably sitting and blood pressure cuff should be at higher level than the heart
C. Caffeine intake induces decrease in blood pressure
D. Blood pressure increases during sleep
13. When a muscle is stimulated repeatedly for several seconds with a constant stimulus, the amount of tension gradually increases to a maximum. This phenomenon is called
A. Incomplete tetanus.
B. Complete tetanus.
C. A twitch.
D. Wave summation.
14. Which of the following hormones or growth factors does not signal via receptor tyrosine kinases?
A. Insulin
B. ANP
C. Epidermal growth factor
D. Platelet derived growth factor
15. The term 'homeostasis' was coined by:
A. Claude Bernard
B. Walter B Cannon
C. Homer Smith
D. William Harvey
16. Which of the following hormones is critical for acute regulation of a falling serum ionized calcium?
A. Calbindin
B. Calcitonin
C. Calcitriol
D. Parathyroid hormone
17. During muscle contraction, myosin cross bridges attach to active sites of:
A. myosin filaments
B. actin filaments
C. Z lines
D. thick filaments
18. During muscle contraction, all of the following occur, except
A. ATP is hydrolyzed.
B. Myosin heads bind to actin.
C. The H band becomes shorter.
D. Hemoglobin concentration in muscle fibers increases.
19. Diurnal variation in eosinophil count is due to
A. cortisol
B. insulin
C. thyroid hormones
D. thrombopoietin
20. If light reflex is present and the accommodation reflex absent, then the lesion is most likely in the:
A. pretectal nucleus
B. ganglion cells
C. Edinger-Westphal nucleus
D. visual cortex
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