The blind spot in each visual field is a region in which A. There are rod cells
ID: 78923 • Letter: T
Question
The blind spot in each visual field is a region in which A. There are rod cells but no cone cells B. There are cone cells but no rod cells C. Bipolar cells block light from reaching the rods and cones D. The iris casts a shadow on part of the retina E. The optic nerve leaves the eye Tears are produced by A. The lacrimal glands B. The tarsal glands C. The puncta lacrimation D. The lateral canthi E. The lacrimal sac Which of the following neurons is most likely to be adrenergic? A. Preganglionic sympathetic B. Preganglionic parasympathetic C. Postganglionic sympathetic D. Postganglionic parasympathetic E. Postganglionic somatic motor Oxytocin is responsible for A. Preventing release of insulin from the pancreas B. Preventing the formation of goiters C. Milk production by the mammary glands D. Regulating blood calcium levels E. Causing contractions of uterine smooth muscle during labor The heart A. is lined with an epithelial layer called epicardium B. iExplanation / Answer
18. ANS: E. the optic nerve leaves the eye.
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The blind spot occurs where the optic nerve leaves the eye.
19. ANS: A.The lacrimal gland.
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Tears are produced by the lacrimal gland. The lacrimal glandproduces tears which then flow into canals that connect to the lacrimal sac. From that sac, the tears drain through the lacrimal duct into the nose.
20. ANS: c.Postaganglionic sympathetic.
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Adrenergic neurons secrete norepinephrine and are found in both the central and autonomic nervous system.Within autonomic fibers, adrenergic neurons are exclusively found in postganglionic neurons of the sympathetic nervous system.
21. ANS: E. causing contractions of uterine smooth muscle during labor.
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Oxytocin is released during labor when the fetus stimulates the cervix and vagina, and it enhances contraction of uterine smooth muscle to facilitate parturition or birth.
22. ANS: B. The heart is a four-chambered muscular pump
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The heart is a four-chambered muscular organ containing an involuntary conduction system that initiates rhythmic contractions to pump blood throughout the body.
22. ANS: C. Myocardium.
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The myocardium is the middle muscular layer of the heart's walls and it functionsby providing a scaffolding for the heart chambers, assisting in contraction and relaxation of the cardiac walls
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