Human Physiology Exam 2 - Jaques Hill1. Cardiac Muscle Cellsa. Are not striatedb. Are spindle shapedc. Cannot undergo tetanic contractionsd. Are multinucleated2. Receptors for acetylcholine are located on thea. Sarcomereb. Transverse tubulec. Motor end platesd. Synaptic knobe. Synaptic cleft3. At rest, active sites on the actin are blocked bya. Trepomyosin moleculesb. Myosin moleculesc. ATP moleculesd. Troponin moleculese. Calcium Ions4. The structure that overlies the organ of Corti is thea. Stapeditisb. Basilar membranec. Endolymphd. Perilymphe. Tectorial membrane5. The axons of neurons that innervate regions of smooth muscle cells divide into branches that contain swollen regions calleda. Motor end platesb. Varicositiesc. Axon terminalsd. What the heck?6. What contains a spiderweblike network of cells and and fibers through which cerebrospinal fluid flows?a. Dural sinusb. Pia materc. Falx cerebrid. Subdural spacee. Subarachnoid space7. Adrenergic synapses release the neurotransmittera. Norepinephrineb. Acetylcholinec. Dopamined. GABAe. Serotonin8. Skeletal muscle fibers differ from “typical cells” in that muscle fibersa. Lack a plasma membraneb. Have many nucleic. Are very smalld. Lack mitochondriae. Both B and C9. The first step in the process of photoreception is a. The bleaching of conesb. Absorption of light by a visual pigmentc. Inhibition of the sodium pumpsd. The bleaching of the rodse. Release of neurotransmitter10. Each skeletal muscle fiber is controlled by a motor neuron at a singlea. Synaptic cleftb. Sarcomerec. Transverse tubuled. Synaptic knobe. Neuromuscular junction11. Perception of gravity and linear acceleration depends ona. The force exerted by otoliths embedded in gelatinous material on hair cellsb. The movement of endolymph within the semicircular canals.c. Vibrations of the tectorial membrane striking hair cellsd. Changes in the pressure exerted by the cupula on hair cellse. Both C and D12. The ________ nervous system is composed of the brain and spinal cord.a. Afferentb. Centralc. Peripherald. Efferente. Autonomic13. The rapid rise and fall in force produced by a muscle fiber after a single action potential isa. An unfused tetanusb. A tetanusc. A twitchd. An end plate potentiale. A muscle action potential14. Cross-bridges are portions ofa. Tropomyosin moleculesb. Actin moleculesc. Calcium ionsd. Myosin moleculese. Troponin molecules15. The pituitary hormone that promotes ovarian secretion of progesterone and testicular secretion of testosterone is a. TSH (Thyroid Stimulating Hormone)b. ACTH (adrenocorticotropic hormone)c. FSH (follicle stimulating hormone)d. LH (leutinizing hormone)e. GH (growth hormone)16. Which of the following descriptions best matches the term stereocilia?a. Transmit movement of the tympanic membrane to the inner earb. Seal the oval windowc. Tiny weights necessary for the static sense of equilibriumd. Move up and down when the stapes moves back and forthe. Bending these produces receptor potential in hair cells17. At rest, the tropomyosin molecule is held in place by a. ATP moleclesb. Actin moleculesc. Calcium ionsd. Myosin moleculese. Troponin molecules18. The ________ nervous system controls the skeletal muscles.a. Sympatheticb. Afferentc. Parasympatheticd. Autonomice. Somatic efferent19. Neurons of the supraoptic and paraventricular nuclei of the hypothalamus manufacturea. CRF and GnRHb. TSH and PSHc. ADH and oxytocind. FSH and PRLe. GHIH and GHRH20. How many neurons are in the pathway from the CNS to an effector organ in the Autonomic Nervous System?a. 1b. 2c. 3d. More than 321. The pituitary hormone that promotes egg development in ovaries and sperm developmentin testes is a. TSH (thyroid stimulating hormone)b. ACTH (adrenocorticotropic hormone)c. FSH (follicle stimulating hormone)d. LH (leutinizing hormone)e. GH (growth hormone)22. When an external force bends the stereocilia of the inner ear hair cells,a. There is a change in the transmembrane potential of the hair cellsb. The cells become unresponsivec. Dizziness resultsd. The hair cells are temporarily damagede. The force is converted into mechanical energy23. The ventral root of a spinal nerve containsa. Cell bodies of sensory neuronsb. Cell bodies of motor neuronsc. Axons of sensory neuronsd. Axons of motor neuronse. Interneurons24. Cardiac muscle cells can transmit action potentials one to another becausea. They contain dense bodiesb. Their cell membranes contain voltage gated channelsc. Demosomes connect the cellsd. Gap junctions connect the cells25. Controlling posture and balance and coordinating movements of the body are functions ofthea. Cerebrumb. Mesencephalonc. Medulla oblongatad. Ponse. Cerebellum26. Peptide hormones are a. Composed of chains of amino acidsb. Produced by the suprarenal glandsc. Derived from the amino acid tyrosined. Lipidse. Chemically related to cholesterol27. The sympathetic nervous system is responsible fora. Rest and digestb. Sensory perceptionc. Fight or flightd. Activating skeletal muscle28. The part of the peripheral nervous system that carries sensory information to the CNS is designateda. Efferentb. Afferentc. Somaticd. Autonomice. Motor29. The hypothalamus controls secretion by the adenohypophysts by a. Direct neural stimulationb. Indirect osmotic controlc. Secreting releasing and inhibiting factors into a tiny portal systemd. Altering ion concentrations and pH in the anterior pituitarye. Gap synaptic junctions30. Sensory information is processed and relayed to the cerebrum by the a. Ponsb. Cerebellumc. Midbraind. Thalamuse. Medulla oblongata31. Interactions between actin and myosin filaments of the sarcomere are responsible fora. Muscle fatigueb. The striped appearance of skeletal musclec. Muscle relaxationd. The conduction of neural stimulation to the muscle fibere. Muscle contraction32. The plasma membrane of skeletal muscle is called the a. Sarcolemmab. Sarcomerec. Sarcosomed. Sarcoplasmic reticulume. Sarcoplasm33. A hormone that helps to regulate the sodium ion content of the body isa. Cortisolb. Parathormonec. Thymosind. Somatotropine. Aldosterone34. Spinal nerves area. Purely motorb. Involuntaryc. Interneuronald. Purely sensorye. Both sensory and motor35. Hormones known as “catecholamines” area. Lipidsb. Peptidesc. Steroidsd. Derivatives of the amino acid tyrosinee. Derivatives of reproductive glands36. The dorsal root of a spinal nerve containsa. Cell bodies of sensory neuronsb. Axons of motor neuronsc. Cell bodies of
View Full Document
Unlocking...