Bio 251 Exam 2 WSU Questions With 100% Correct Solutions.

Which of the following is part of the autonomic nervous system? - Answer-parasympathetic and sympathetic The part of the brain that is the critical link between the nervous and endocrine systems is... - Answer-The hypothalamus The cerebellum is involved in - Answer-coordination of voluntary muscle activity Which of the following is most involved in generating emotions? - Answer-Limbic System Tight junctions between capillary endothelial cells in the central nervous system create the bloodbrain barrier, thereby restricting the ________ molecules into the brain. - Answer-Diffusion of hydrophilic Which of the following statements about simple spinal reflexes is true? - Answer-More than one efferent neuron can be activated as part of the reflex Information from chemoreceptors on your tongue is sent to the CNS via - Answer-A sensory afferent Fast adapting (also called phasic) receptors show... - Answer-a decline in membrane potential as a stimulus continues Which of the following is the best description of sweet taste bud receptor function? a) Membrane receptors on sweet taste buds bind glucose or other sugars, which initiates a G protein system, which ultimately causes K+ channels to close, which thereby hyperpolarizes the membrane. b) Membrane receptors on sweet taste buds bind glucose or other sugars, which closes the K+ channels, which ultimately initiates a G protein system, which thereby depolarizes the membrane. c) Membrane receptors on sweet taste buds bind glucose or other sugars, which initiates a Gprotein system, which ultimately causes K+ channels to close, which thereby depolarizes the membrane. d) Membrane receptors on sweet taste buds bind acids (H+ ), which initiates a G protein system, which ultimately causes K+ channels to close, which thereby depolarizes the membrane. e) Membrane receptors on sweet taste buds bind glucose or other sugars, which hyp - Answer-c) Membrane receptors on sweet taste buds bind glucose or other sugars, which initiates a G protein system, which ultimately causes K+ channels to close, which thereby depolarizes the membrane. When an olfactory receptor binds a chemical, it causes _____ to _____ the receptor. This creates a(n) __________ in the receptor membrane. - Answer-Na+ and Ca++; enter; graded potential Parasympathetic preganglionic neurons release the neurotransmitter ________; sympathetic preganglionic neurons release the neurotransmitter ________. - Answer-acetylcholine : acetylcholine The preganglionic neurons of the sympathetic nervous system emerge from the ________ of the spinal cord - Answer-thoracic and lumbar regions . During a fight or flight response, ________ receptors in blood vessels leading to the GI tract bind primarily _____ which causes the blood vessels to _________. - Answer-Alpha; norepinephrine; constrict During a fight or flight response, ________ receptors in blood vessels leading to the heart bind primarily _____ which causes the blood vessels to _________. - Answer-Beta-2; epi; dilate Which of the following events in the human female sexual cycle are NOT caused by the parasympathetic nervous system? - Answer-Rhythmic contraction of pelvic muscles at 0.8 second intervalsWhen acetylcholine binds to the motor end plate it causes a net movement of _______ into the muscle cell by the process of _________ which results in a ___________ potential in the motor end plate - Answer-Na+; diffusion; graded Endocrine glands are composed of what primary tissue? - Answer-Epithelial Which of the following statements are true? a) a given endocrine gland can only produce one hormone b) a given hormone can be produced by only one endocrine gland c) a single target cell can be influenced by only one hormone d) none of the above are true e) b and c only are true - Answer-d) none of the above are true