Biology question and answers for December 03, 2023
- Q The unconscious control of respiration and circulation are associated with themedulla oblongata.cerebrum.corpus callosum.thalamus,cerebellum.
- Q The divisions of the nervous system that have antagonistic, or opposing, actions aresympathetic and parasympathetic systems.central nervous system and peripheral nervous system.presynaptic and postsynaptic membranes.forebrain and hindbrain.motor and sensory systems.
- Q Myelinated axons of neurons are especially abundant in thegray matter of the brain and the white matter of the spinal cord.all areas of the brain and spinal cord.white matter of...
- Q The term central nervous system refers to thebrain and spinal cordsensory (afferent) nervessomatic nervesspinal nerves
- Q When a neurotransmitter like acetylcholine is acting in an excitatory manner which of the following is likelya result of the acetylcholine acting on the postsynaptic cell?Chemically gated sodium channels will...
- Q Order the events for muscle contraction:opening of sodium ions channel in sarcolemmacalcium ions bind to troponin, shifting tropomyosin, uncovering myosin-binding sites in the actin molecules.motor neuron action potentialAcetylcholine releaseContraction occurs...
- Q Put the following events in order as neurotransmitters are released from the axon terminal andexcite the synapsed cell.i. Calcium entry triggers exocytosis of synaptic vesicle contents.ii. An action potential depolarizes...
- Q Action potentials are considered "all-or-nothing" because:the greater the magnitude of the stimuli, the greater the intensity of the action potential.only motor stimuli can activate action potentials.all stimuli great enough to...
- Q Functional classification of neurons is based onwhether the signal carried is traveling toward or away from the CNSthe length of the axonthe number of processes coming off the cell body.the...
- Q Indicate if the structure/functionis part of thesympathetic, parasympathetic, or both divisions.short preganglionicneuronsshortpostganglionicneuronshas thoracic originacetylcholinereleased at targetunmyelinatedpostganglionicneuronsreleasesacetlycholine frompreganglionicneuronssympatheticparasympathetbothbothparasympathetsympathetic
- Q Myelin is important ininsulating axons and increasing the conduction velocity of action potentialsabsorbing damaged tissue or invading organismsmaintaining the ionic balance in the environment surrounding the axonallowing electrical signals to...
- Q descend to the spinal cord without synapsing and regulate skill movements:- ascending tracts- lower motor neurons- pyramidal tracts- indirect pathways
- Q The structures labeled "1" are dendrites. Their membranes contain numerous chemically- gated ion channels.The first statement is true but the second statement is false.Both statements are false.Both statements are true.The...
- Q Neurologic deficits can manifest asA. Gait abnormalitiesB. Memory lossC. All of the aboveD. Problems with speech
- Q A young man suffers a spinal cord injury while diving at the community pool. He reports that he cannot feel his arms or legs, and he is unable to move...
- Q Which of the following is true about the corpus callosum?A thicker corpus callosum allows for a more lateralized brainIt is thicker in female brainsIt is thicker in male brainsThis structure...
- Q Select the true statements (more than one) about the characteristics of sensory neurons in the stretch reflex.A. These sensory neurons typically transmit efferent impulses toward antagonist muscles.B. These sensory neurons...
- Q To improve productivity, a local bakery rents a machine that mixes, partitions, and then bakes dough for a variety of pastries. The machine costs the business $2,500 per month to...
- Q Identify the INCORRECT statement regarding action potentials:The frequency of action potentials change depending on stimulus intensity.The greater the membrane resistance, the greater the conduction speed.Action potentials do not degrade over...
- Q Selena has been asked to create a neuron with the fastest possible conduction velocity but it needs to have an unmyelinated axon. Assuming that the Selena's neuron will be exposed...
- Q Which one of the following statements about inhibitory synapses is FALSE?The postsynaptic cell is less likely to generate an action potential.The membrane potential of the postsynaptic cell can be hyperpolarized.Opening...
- Q Which of the following are examples of fine motor skills? Select all the correctoptions.a) Lifting a heavy weightb) Knitting a quiltc) Playing the pianod) Swimming lapse) Texting on a cell...
- Q According to Fitts and Posner, which of the following are stages to learning a new skill? Select all the correct options.a) Socialb) Associativec) Automaticd) Cognitivee) Autonomous
- Q What is another name for the neurohypophysis What organs does the follicle stimulating hormone act on (this is a word that can be used for both males and females)?
- Q You can help less sensitive toddlers byA. drawing their attention to details.B. waiting for them to notice colors, textures, and smells on their own.C. criticizing them for missing details.D. nagging...
- Q People who have Alzheimer's disease experience an increasing loss of brain function and cognition over time. Alzheimer's is characterized by a buildup of abnormal protein fragments that damage brain cells....
- Q Which of the following occurs when muscles begin to spasm or tighten when the body loses excessive amounts of fluids and electrolytes?Heat exhaustionHeat strokeHeat crampsHeat loss
- Q Which category of antidepressant drugs operates by blocking the enzyme that metabolizes catecholamines and serotonin into inactive forms?atypical antidepressantstricyclicsselective serotonin reuptake inhibitorsMAOIs
- Q Neurons in both ischemic and hemorrhage strokes die fromunderstimulation.depleting the glutamate supply available to neurons.overactivating the sodium-potassium pump.overstimulation
- Q You mechanically voltage-clamping isolate an ipRGC from the retina. While this cell at +70 mV, you present a 1- minute light to it. Which of these recordings would you expect?ABC
- Q A whisper is spoken into your ear, but your auditory sensory neurons don't quite reach threshold of excitation. Thus, you hear:nothing.a softer version of the person's voice.an amplified, intense scream.auditory...
- Q Read the following passage from The Grapes of Wrath and answer the question that follows.His was a long head, bony; tight of skin, and set on a neck as stringy...
- Q Suppose a single neuron, with lots of input from other neurons, determines if we post something on Instagram or not. That "decision" will be based on:the combined effects of EPSPs...
- Q At the beginning of the falling phase of the action potential, what is the relative voltage driving force for Na+ and K+?a. there is O voltage driving force for bothb....
- Q The autonomic division of the nervous systemIs involved in conscious thoughtControls voluntary musclesControls unconscious life-sustaining activitiesIs involved in learning
- Q Some athletes can have a resting heart rate of 50 beats per minute compared to 70-80 beats per minute. This decreased heart rate is partly due tosympathetic activity becoming more...
- Q If you are lying stationary on horizontal bed in complete darkness, which of these sensors will tell you whether you are lying on your back or on your side? cochlea...
- Q Yasaman has isolated a typical neuron in her lab and observed that the membrane potential is sitting at +100mV. Having taken PSL300, you are aware that chloride's equilibrium potential is...
- Q The tension produced during skeletal muscle contraction can be increased by all of the following EXCEPT:increasing the frequency of action potentials in the motor neuron innervating the muscleincreasing the load...
- Q When you carry an object in your hand, activity in which receptors tells you that you haven't lost your grip on it?Pacinian corpusclesfree nerve endingsMeissner corpusclesMerkel disks
- Q The direction of change in the membrane potential, in response to stimulus that initiates a graded potential, is dependent onthe gating of sodium channels onlythe changes in ion concentration across...
- Q In a hypothetical experiment, human subjects were placed in a room, the temperature of which was higher than body temperature (37C). At the same time, blood, cooler than 37 C,...
- Q In a paraplegic with autonomic dysreflexi, the heart rate will decrease because:a. The SNS is activatedb. The baroreceptors detect high blood pressurec. The brain is not able to detect the...
- Q A client with a spinal injury has suffered postural hypotension because:Select one:a. the brain can no longer turn on the SNS in the body below the lesionb. the brain can...
- Q If you would like to see all the four ventricles of the brain in one single section, which plane do you need to use to make the section?A parasagittal planeA...
- Q Triggering of a neuromuscular response that can be evaluated on EMG as the point of onset of a perturbation in balance to the onset of myoelectric activity or a twitch:agilityselective...
- Q Though the brain represents less than 2 percent of your body weight, it uses 25 percent of theoxygen you breathe and 70 percent of your glucose supply.The brain has five...
- Q The action potential is: A graded depolarization response that depends on the synaptic input strength. An "all-or-none" depolarization response trigged when the membrane potential crosses the threshold. An "all-or-none" hyperpolarization...
- Q Which type of memory is used for skills, habits, and behaviors?a. Working memoryb. Declarative memoryc. Long-term memoryd. Procedural memory
- Q a) Imagine you are conducting an experiment to measure the resting potential of a nerve cell. One input to the recording device is from the probe that gets inserted into...
- Q SDSNONE OF THESEcolors proteins for visualization.ALL OF THESEreduces disulfide bonds.denatures proteins
- Q Nociceptors (pain receptors) have been shown to not adapt. Why might it be good that they don't adapt?
- Q Which of the following is the organ system that transportssignals from the brain to the muscles?O Endocrine system.O Respiratory system.O Digestive system.O Nervous system.
- Q What are the three parts to a feedback loop?O Stimulus, sensor, and response.O Positive, negative, and neutral pathways.O Input, output, and direction of signal.O Receptors, producers, and transmitters.
- Q Describe how the behavior of voltage gated Na+ ion channels and voltage gated K+ channels eachcontribute to the rapid recovery of resting membrane potential after an action potential occurs. Foreach...
- Q Which two systems of a rabbit s body must be working together for the rabbit to run away from a fox Odigestive and endocrine O reproductive and nervous O muscular...
- Q The best definintion for a tropic hormone is one that a is secreted out of the body i e the skin or into the gut b has as a target...
- Q A B Na www www C D E In order to complete the transepithelial transport during tubular reabsorption ATP is required at D When compared one would expect the concentration...
- Q stituent C Is abortion a controlled medical procedure or a right to have terminate a family Where does your Representative you work for stand on the issue You choose the...
- Q RNA polymerase can only add to the of a growing transcript because of the presence of a hydroxyl group A 5 C 3 B non coding D tRNA
- Q Rewrite the term HYPOPITUITARISM in the appropriate location to separate it into it s component parts and place the separation marks slashes in the term
- Q Prolactin oxytocin and estrogen act on the body in a Opposing interaction O Commensal interaction Permissive interaction Synergistic interaction Priming interaction
- Q The atmosphere is currently composed of 21 oxygen and 0 03 carbon dioxide Photosynthesis cellular respiration and other processes such as fossil fuel combustion combine to create the composition of...
- Q e Animations Regulation of Hormone Release Cortisol is a hormone that was not mentioned in the video It helps the body deal with stressors and is released from the adrenal...
- Q 5 Steroid and non steroid hormones are the two general classifications of hormones Be able to define them simply describe how they communicate with a cell and give of each...
- Q Which of the following is true about hematopoiesis Mark all that apply Totipotent HSCs become differentiated by factors released in the body O Pluripotent HSCs become differentiated by factors released...
- Q The body can store some of the things it needs to function Some animals have the ability to store oxygen for long periods of time allowing them to hold their...
- Q The pineal gland O has an anterior portion that secretes 7 hormones O secretes hormones that regulate glucose metabolism O is located on top of the kidneys seems to be...
- Q OA A a ruptured eardrum OB dizziness C inflammation of the nose D ringing in the nors
- Q 3 While viruses are in the host cell they can complement their RNA material with a DNA 4 All viruses can introduce genetic mutation specially those that lyse cells
- Q enza viruses can attach to proteins on the surface of healthy human cells as shown in the model below What term describes the attachment sites on the surface of the...
- Q The n terminus of cGAS prevents it from accessing the mitochondria DNA and initiating an immune response against it O True O False
- Q Which of the following is NOT a characteristic of Natural Killer NK cells View Available Hint s ONK cells attack infected or cancerous cells NK cells recognize abnormal or cancer...
- Q Biology Which enzyme is the central regulator of blood glucose levels and how is the activity of this enzyme regulated
- Q 20 Acidic pH is an important antimicrobial defense in which of the following body sites A Blood B Colon C Skin D Teeth E Urine 21 Typhoid Mary was a...
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