LECTURE PRACTICE TEST 2_ANSWER KEY

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Apr 3, 2024

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PHYSIOLOGY LECTURE PRACTICE TEST 2_ANSWER KEY Professor Zaidi-Merchant Grade yourself by matching your answers to the answer key and see how well you did 😊 1. The part of the brain that coordinates voluntary movements such as posture resulting in smooth and balanced muscular, motor activity. a. Cerebrum b. midbrain c. cerebellum d. hypothalamus e. cerebral cortex 2. Which of the following statements regarding PNS neurons are correct ? Check all that apply a. Sympathetic and parasympathetic preganglionic neurons are both highly myelinated b. Preganglionic neurons release neurotransmitter ACh at autonomic ganglion c. Somatic neurons are unmyelinated d. Cholinergic receptors bind to norepinephrine e. Adrenergic receptors bond to catecholamines f. Parasympathetic nerve fibers originate around the thoracic and lumbar region of the spinal cord 3. The superior colliculi on the brain stem is associated with a. Visual reflex b. auditory reflex c. equilibrium d. hearing 4. Sensory nerve fibers carrying sensations of pain and temperature up the spinal cord to the thalamus to cerebral cortex are sent via a. Dorsal columns b. Anterolateral Spinothalamic c. Lateral Spinothalamic d. Anterior Spinocerebellar e. Lateral Spinocerebellar 5. The cranial nerve responsible for motor function such as movement of the eyes laterally a. Optic n. II b. Oculomotor n. III c. Trochlear n. IV d. Trigeminal n. V e. Abducens n. VI 1

6. Cells that secrete cerebral spinal fluid a. Ependymal cells b. Oligodendrocytes c. Microglial cells d. Schwann cells e. Satellite cells 7. The neurotransmitter secreted at the autonomic ganglion a. Epinephrine b. Acetylcholine c. Norepinephrine d. Dopamine 8. Which of the following statement about vision as image is formed on the retina is incorrect ? a. Light from object forms focused image on retina b. Curved surface of the cornea and lens bends light rays c. Cornea and Vitreous humor responsible for bending of light d. Lens can change shape called accommodation e. Inverted image is larger than real object formed on retina 9. Which of the following statements regarding olfaction is incorrect? a. Olfactory receptors bind to odorant molecules in olfactory bulb b. Dendrites of olfactory neurons meet in spherical clusters called glomerulus c. Basal cells give rise to new olfactory cells d. Tufted and mitral cell axons form olfactory tracts that reach the brain 10. Which muscle regulates the downward and outward movement of the eye? a. Superior oblique b. Inferior oblique c. Lateral rectus d. inferior rectus e. Superior rectus f. medial rectus 11. Which of the following statements regarding taste physiology are correct? Check all that apply a. Sugar molecules use ionotropic receptors that depolarize gustatory cells b. Umami and bitter molecules use g-coupled protein receptors to depolarize gustatory cells c. Sodium ions released from the food lead to closing of the voltage gated Na+ channels to open and depolarize gustatory cells d. Depolarization of the gustatory cells leads to opening of the ligand gated Ca2+ channels e. Influx of Ca2+ into the gustatory cells leads to release of neurotransmitters by the synaptic vesicles f. IP3 and cAMP are secondary messenger chemicals used by the metabotropic receptors in gustatory physiology 12. The endolymph is found in the ___________________ of the cochlea and is rich in ______ ions a. Scala media; K+ b. Scala media; Na+ c. Scala vestibuli; K+ d. Scala vestibuli; Na+ e. Scala tympani; K+ 2

13. During depolarization, which of the following channels are fully open? a. Na+ gated channels b. K+ gated channels c. Ca2+ channels 14. During repolarization, the inside of the neuron cell is more ___________ than outside the cell a. Negative b. Positive c. Neutral d. Unknown 15. Photoreceptors that absorb long wavelengths of light in the retina that helps you see color a. L cones b. M cones c. S cones e. G cones 16. Part of the cerebral cortex that processes hearing a. Occipital b. Frontal c. Temporal d. Parietal 17. Catecholamines bind to ________________ receptors at the target tissues a. Nicotinic b. Cholinergic c. Ionotropic d. Adrenergic 18. Receptors that detect change in muscle length a. Proprioceptors b. Nociceptors c. Thermoreceptors 19. Which of the following is not an encapsulated receptor? a. Free nerve endings b. Ruffini c. Pacinian corpuscles d. Krause bulbs 20. Neuroglial cells that destroy pathogens in the central nervous system as a part of immune system a. Oligodendrocytes b. Ependymal cells c. Microglial cells d. Schwann cells 3

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LECTURE PRACTICE TEST 2_ANSWER KEY

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