BIO 669 quiz 2 Correct Questions & Answers 100% Correct!!, Exams of Biology

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BIO 669 quiz 2 Correct

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When both Na+ and K+ are permeable at the same time, what will happen to the membrane potential? - ANSWERThe cell membrane depolarized Graded potentials are all of the following except: - ANSWERImpulses which travel without diminishing over distance Movement of K+ down its electrochemical gradient will result in what effect on membrane potential?

• ANSWERHyperpoloarization The reticular formation is responsible for? - ANSWERWakefulness and vital reflexes Damage to Broca's area is mostly likely to cause: - ANSWERinability/difficulty in forming words (expressive aphasia) A stroke affecting the temporal lobe would most likely affect: - ANSWERPrimary auditory complex (language recognition) Vascular smooth muscle is most impacted by what type of receptor? - ANSWERAlpha 1 The alpha-1 receptor will, upon binding to its ligand, will result in which of the following effects: - ANSWERExcitation and vasoconstriction of vascular smooth muscles The ______ division of the autonomic nervous system helps conserve energy and the bodys resources (rest and digest) and uses _______ as its neurotransmitter(s) - ANSWERParasympathetic; acetylcholine

Parasympathetic system stimulation causes all of the following except: - ANSWERIncreasing vasodilation of vascular smooth muscle The effect of sympathetic nervous system activation on metabolism includes all of the following EXCEPT: - ANSWERStorage of glucose as glycogen is enhanced Which of the following is a correct statement regarding the comparison of the autonomic and somatic nervous system? - ANSWERThey both originate in the CNS and end in the PNS, so are part of the peripheral nervous system All of the following are true regarding graded potential EXCEPT: - ANSWERThey all look alike (in amplitude) The peripheral nervous system division that arises from the thoracic and lumbar regions is the: - ANSWERSympathetic Saltatory conduction: - ANSWEROccurs only at the bodes of Ranvier A stroke to the occipital love is most likely to show signs and symptoms affecting the: - AN A stroke affecting the temporal lobe is most likely to show signs and symptoms affecting the: - ANSWERPatient's speech or hearing Ephedra is a sympathomimetic, meaning it has sympathetic nervous system activating effects. As such, it may be assumed to have all of the following side effects EXCEPT - ANSWERDiarrhea and abdominal cramping The parasympathetic nervous system is associated with which of the following: - ANSWERGanglia that are close to the target organ SWERPatient's vision Calcium has an equilibrium potential of 123mV. This means, that under normal resting potential, if Ca++ become permeable the membrane potential would: - ANSWERBecome more positive until the inside of the cell became positive

Upon opening, voltage gated Na+ channels will allow ions to flow until: - ANSWERThe inactivation gates close Making the inside of the cell membrane more negative relative to the outside of the membrane would be considered: - ANSWERHyperpolarization (repolarization) Any given spinal nerve arises from (is formed by): - ANSWERThe combination of an anterior spinal root with a posterior spinal root The Basal ganglia (cerebral nuceli) are most involved in: - ANSWERInhibiting unwanted movement (coordinating movement) Which of the following receptor type does not activate G proteins (i.e. does not use a second messenger system)? - ANSWERNicotine The beta-2-receptor, upon binding to its ligand, will result in which of the following effects? - ANSWERVascular smooth muscle relaxation and dilation in cardiac arterioles The frontal lobe is responsible for conscious: - ANSWERControl of voluntary motor area and limbic system A stronger stimulus will result in greater membrane depolarization of neuro resulting in: - ANSWERMore frequent action potentials The receptive (incoming signal) portion of the neuron is called the: - ANSWERDendrite Demyelinating diseases, such as MS and Guillain Barre, may not initially damage the axon but still can result in symptoms and dysregulation because: - ANSWERThe rate of AP transmission, thus information, is altered The minimum depolarization needed to open voltage-gated Na+ channels and form an action potential is termed: - ANSWERThreshold

If the K+ channels opened and stayed open, what would happen to the resting membrane potential of -70mV? - ANSWERBecome more negative until the membrane potential reached -94mV The cerebellum is most responsible for: - ANSWERControl of fine motor control and balance/posture