MOCK EXAM 3 (Brain & CNSCardiovascular System)
1.All of the following senses must pass through the thalamus except:
A.Olfaction
B.Gustation
C.Vision
D.Audition
E.None of the above
2.The sensory homunculus is a functional map that shows the _____
A.Relative size of sensory regions in the body
B. Number of muscles under the skin
C. Density of sensory receptors representing the regions of the body
D. Absolute size of sensory units
E. All are correct
3.Which of the following has centers for control of reflexes in response to visual and auditory stimuli?
A.Basal nuclei
B. Mesencephalon
C. Spinal chord
D.Medulla oblongata
E. Pons
4.Which area of the brain is responsible for patterns related to eating, drinking, autonomic, and sexual activity?
A.Mesencephalon
B.Pons
C.Medulla Oblongata
D.Hypothalamus
E.Basal nuclei
5.Which secondary brain vesicle forms the cerebrum?
A.Telencephalon
B.Myelencephalon
C.Prosencephalon
D.Metencephalon
E.Mesencephalon
6.In the sympathetic division of the ANS, ______.
A.The preganglionic fibers are short and the postganglionic fibers are relatively long
B.The preganglionic fibers are long and the postganglionic fibers are short
C.Both preganglionic and postganglionic fibers are short
D.Postganglionic fibers are absent
E.Both preganglionic and postganglionic fibers are long
7.Which of the following is a general function of the parasympathetic division of the ANS?
A.dilation of the respiratory passageway
B.Inhibition of sexual arousal
C.Increased smooth muscle activity along the digestive tract
D.Dilation of the pupils
E.Increased heart rate
7.Gustatory information from the anterior 2/3 of the tongue is carried to the gustatory cortex of the cerebrum via which cranial nerve?
A.Vagus
B.Glossopharyngeal
C.Facial
D.Hypoglossal
E.Trigeminal
8.What is the function of the auditory tube?
A.It provides directional sensitivity to the ear
B.It serves to equalize pressure in the middle ear cavity with the external, atmospheric pressure
C.It protects the external acoustic meatus
D.It converts arriving sound waves into mechanical movements
9.Which of the following is a function of the vascular tunic?
A.Secretion and reabsorption of the aqueous humor
B.Contains visual receptors and associated neurons
C.Serves as an attachment site for the extra-ocular muscles
D.Provides mechanical support and some degree of physical protection
E.Contains structures that assist in the focusing process
10.Which muscles of the eye are under parasympathetic innervation via CN III?
A.Ciliary muscles
B.Medial rectus muscles
C.Pupillary dilator muscles
D.Lateral Rectus
E.Pupillary sphincter muscles
11.Swelling of the jugular vein as it leaves the skull could compress which of the following cranial nerves?
A.CN I, II, III
B. CN X, VII, V
C. CN IV, V, VI
D. CN VI, VII, VIII
E. CN IX, X, XI
12.Prominentcommisural bundles linking the cerebral hemispheres include the______.
A.Projection fibers
B.Longitudinal fasciculi
C.Arcuate fibers
D.Corpus callosum
E.Internal capsule
13.What structure is the primary connection point between the nervous and endocrine systems?
A.Hypothalamus
B.Pineal Gland
C.Pituitary Gland
D.CN IX
E. None of the above
14. Through which two holes of the skull does the blood supply to the brain enter?
A. Foramen ovale and jugular foramen
B. Foramen magnum and jugular foramen
C. Foramen magnum and carotid canal
D. Carotid canal and jugular foramen
E. Carotid canal and foramen ovale
15. The lobe of the brain associated with olfaction is the ______
A.Frontal lobe
B.Temporal lobe
C. Occipital lobe
D.Parietal lobe
E. Insula
16. Which of the following is incorrect?
A. Thyroid hormones are actively involved in metabolism
B. Aldosterone and ADH both have a similar function of water conservation
C. TSH acts on the suprarenal cortex
D. The endocrine system releases its hormones directly into blood vessels.
E. All are correct
17. The space through which CSF flows in the brain and spinal cord is called ______
A.Subarachnoid space
B.Subdural space
C.Subpial space
D.Epidural space
E. Sublingual space
18. Which of the following is true?
A. Glaucoma affects the rods and cones of the retina
B. CN II is not a true peripheral nerve, rather an extension of the brain
C. Vitreous humor is highly regenerative
D. The lens has a very low degree of elasticity
E. All are true
19. The pharynx plays an important role in which of the following two systems?
A.Digestive and Cardiovascular
B. Digestive and Respiratory
C. Respiratory and lymphatic
D. Respiratory and cardiovascular
E. Lymphatic and Cardiovascular
20. Which of the following is paired correctly?
A.cochleabalance and coordination
B.Eustachian tubehearing
C.Utricle and sacculegravity and linear acceleration
D. semicircular ductsgravity and linear acceleration
E.None of the above
20. Which of the following is incorrect?
A.Cerebrospinal production begins in the third ventricle
B.Cerebrospinal fluid helps remove waste and absorb shock
C.Cerebrospinal fluid flows through the subarachnoid space of the brain and spinal cord
D. Cerebrospinal fluid flows from the third ventricle to the fourth ventricle via the cerebral aqueduct
E. All are correct
Use the following image to answer questions 21-28
21. This nerve has a visceral motor function that gives parasympathetic innervation to the parotid gland.
22.Branches of this nerve include Ophthalmic, maxillary, and mandibular
23.Injury to this nerve can affect the muscles of the tongue
24. This nerve exits through the cribriform plate
25. This nerve provides parasympathetic innervation to viscera
26. Branches of this nerve include vestibular and cochlear
27. This is CN IV
28. The decussation of this nerve forms the optic chiasm
29. Which of the following is incorrect regarding the autonomic nervous system?
A.Each autonomic nerve has a preganglionic and postganglionic part
B.Parasympathetic nerves synapse at their effector organ or very closely to the effector organ
C.Sympathetic nerves only act on one gland, sweat glands
D. The origin of the parasympathetic nervous system is lumbar and thoracic nerves
E. The sympathetic nervous system involves a “fight or flight” response
30. Which of the following are targets for the parasympathetic division of the ANS?
A.Eyes
B. Salivary glands
C.Lacrimal glands
D.Abdominal viscera
E. All of the above
31. Functions of the blood include ______
I.Delivery of O2
II.Thermoregulation
III. Uptake of Carbon Dioxide from tissue
IV. Immunity
V. Stabilization of pH and electrolyte composition
A.I and III
B. I only
C. I, II, II, and IV
D. I, III, and IV only
E. I, II, III, IV, and V
32. Which of the following statements is true?
A. Arteries lack the tunica adventitia that veins have
B. Both arteries and veins contain smooth muscle but in different amounts
C. Veins are high pressure vessels due to the large amounts of blood they carry
D. Valves in arteries help prevent backflow of blood
E. All are incorrect
33. The least abundant type of leukocyte are______
A.Neutrophils
B.Monocytes
C. Basophils
D. Eosinophils
E.Lymphocytes
34. Which of the following leukocyte is responsible for specific immunity against individual pathogens?
A.Eosinophils
B.Lymphocytes
C.Basophils
D.Monocytes
E.All of the above
35. Platelets…
A.Are formed from megakaryocytes
B. are active in the blood clotting process
C. Are part of the formed elements of blood
D. A&B are correct
E. None of the above
36. Most of the lymph returns to the venous circulation by way of the
A.Right lymphatic duct
B.Cisternachyli
C.Hepatic portal vein
D.Thoracic Duct
E. Lymphatic capillaries
37.Areas of the spleen that contain large numbers of lymphocytes are known as
A.White pulp
B.Red pulp
C.Adenoids
D. Lymph nodes
E. Lymph vessel
38.Compared to blood capillaries, lymph capillaries…
A.Have a basal lamina
B.Are smaller in diameter
C.Have walls of a smooth endothelial lining
D.Are frequently irregular in shape
E.Allare correct
Use the following image to answer questions 39-42
39.This is the respiratory organ of the fetus
40. This vessel is part of the umbilical cord and carries deoxygenated blood
41. Blood shunts from right atrium to left atrium via this structure
42. This is the ductus venosus
43.What is the name of the tissue that is continuous from crown to root in a tooth?
A.Enamel
B.Dentin
C.Alveolus
D.Cementum
E.Periodontal ligament
44.The human dental formula includes ______per quadrant
A. 2 incisors, 1 canine, 2 premolars, 3 molars
B. 1 incisor, 2 canines, 2 premolars, 2 molars
C. 2 incisors, 2 canines, 1 premolar, 3 molars
D. 2 incisors, 1 canine, 3 premolars, 2 molars
E. 1 incisor, 2 canines, 3 premolars, 2 molars
45. Structures of the right atrium include
A. Right auricle
B. Ligamentumarteriosum
C. Trabeculae Carne
D. Bicuspid valve
E. All of the above
46.Why is the wall of the left ventricle more muscular than that of the right ventricle?
A.The left ventricle used to be two chambers that fused together
B.The right ventricle receives less blood than the left ventricle
C.The left ventricle must pump blood to the rest of the body
D.The left ventricle is made up of smooth muscle which is thicker than cardiac muscle
E. None of the above are correct
47.The heart is innervated by
A.only parasympathetic nervers
B. Only sympathetic nerves
C. Both sympathetic and parasympathetic nerves
D. Splanchnic nerves
E. Phrenic nerve
48.If the papillary muscles fail to contract..
A.blood will not enter the atria
B. The ventricles will not pump blood
C.The AV valves will not close properly
D.The semilunar valves will not open
E. A heart attack will occur