Part 1 of 8 -16.65/ 16.65 PointsQuestion 1 of 303.33/ 3.33 PointsIf you were studying several organs working together to perform a particular function, you would be studying: A.An organism system B.A tissue system C.An organ system D.A cell system E.A metabolic systemFeedback:Good job!Question 2 of 303.33/ 3.33”>This figure shows a model of the negative feedback mechanism. What does “c” represent? A.Sensor B.Homeostasis C.Control center D.Stimulus E.EffectFeedback:Good job!Question 3 of 303.33/ 3.33 PointsYou are studying the differences between male and female humans. Based on your studies, which of the following systems vary the most in structure and function between males and females? A.The digestive system B.The immune system C.The reproductive system D.The cardiovascular system E.The nervous systemFeedback:Good job!Question 4 of 303.33/ 3.33 PointsWhich of the following systems is useful in processing and absorbing nutrients? A.Urinary system B.Digestive system C.Respiratory system D.Reproductive system E.Lymphatic systemFeedback:Good job!Question 5 of 303.33/ 3.33”>This figure shows a model of the negative feedback mechanism. What does “a” represent? A.Homeostasis B.Effect C.Stimulus D.Control center E.SensorFeedback:Good job!Part 2 of 8 -9.99/ 16.65 PointsQuestion 6 of 300.0/ 3.33 PointsYou are dissecting a squid to determine what type of nervous system it has. Based on your dissection you conclude that it has: A.A ladderlike nervous system B.A nerve net C.A brain with a ventral nerve cord D.A brain with a dorsal nerve cord E.A ganglion nervous systemFeedback:In annelids (e.g., earthworm), arthropods (e.g., crab), and molluscs (e.g., squid), the nervous system shows further advances. The annelids and arthropods have the typical invertebrate nervous system. It consists of a brain and a ventral nerve cord that has a ganglion in each segment.Question 7 of 303.33/ 3.33”>This figure shows the parts of a motor neuron. What does “c” represent? A.Schwann cell B.Axon terminal C.Cell body D.Node of Ranvier E.DendriteFeedback:Good job!Question 8 of 300.0/ 3.33 PointsIf you were studying the two parts of the central nervous system in vertebrates you would be studying: A.A ganglion and spinal cord B.A brain and nerve net C.A brain and spinal cord D.A ganglion and nerve net E.A brain and ladderlike nervous systemFeedback:A vertebrate’s central nervous system (CNS) consists of a spinal cord and brain.Question 9 of 303.33/ 3.33”>This figure shows the anatomy of the human brain. What does “e” represent? A.The pons B.The cerebellum C.The cerebrum D.The thalamus E.The corpus callosumFeedback:Good job!Question 10 of 303.33/ 3.33 PointsThe concentration of nerve tissue and sensory receptors in the head region is referred to as: A.Cephalization B.Parasympathetic C.Diencephalon D.Neuromodulation E.AutonomicFeedback:Good job!Part 3 of 8 -16.65/ 16.65 PointsQuestion 11 of 303.33/ 3.33”>This figure shows the anatomy of the human eye. What does “d” represent? A.The retina B.The cornea C.The lens D.The optic nerve E.The scleraFeedback:Good job!Question 12 of 303.33/ 3.33 PointsWhich are the mechanoreceptors that tell us the position of our body parts? A.Stereocilia B.Hair cells C.Cones D.Proprioceptors E.RodsFeedback:Good job!Question 13 of 303.33/ 3.33”>This figure shows the anatomy of the human eye. What does “e” represent? A.The cornea B.The lens C.The sclera D.The retina E.The optic nerveFeedback:Good job!Question 14 of 303.33/ 3.33 PointsA biologist is studying a decrease in response to stimuli. Based on this information you would conclude that he or she is studying which of the following? A.Sensory summation B.Sensory interpretation C.Sensory accommodation D.Sensory adaptation E.Sensory receptionFeedback:Good job!Question 15 of 303.33/ 3.33 PointsWhich of the following is not part of the inner ear? A.The cochlea B.The vestibular nerve C.The cochlear nerve D.The stapes E.The semicircular canalsFeedback:Good job!Part 4 of 8 -13.32/ 16.65 PointsQuestion 16 of 303.33/ 3.33 PointsIf you were looking through a microscope at the tiny chambers where osteocytes are found you would be looking at: A. Osteons B.Central canals C. Lacuna D.The medullary cavity E.CanaliculusFeedback:Good job!Question 17 of 303.33/ 3.33 Points.” src=””>This figure shows the components of a muscle cell. What does “e” represent? A.The sarcolemma B.The sarcoplasm C.The sarcoplasmic reticulum D.A sarcomere E.A myofibrilFeedback:Good job!Question 18 of 303.33/ 3.33 PointsIf you were studying the bones of the skull which of the following would not be included in your studies? A.Parietal B.Frontal C.Scapula D.Temporal E.MaxillaFeedback:Good job!Question 19 of 303.33/ 3.33 PointsIf you were studying the neuromuscular transmitter that is released from the axon terminals you would be studying: A.Calcium ions B.Acetylcholine C.ATP D.Lactic acid E.Creatine phosphateFeedback:Good job!Question 20 of 300.0/ 3.33 PointsWhich of the following organisms have an endoskeleton? A.Echinoderms B.Earthworms C.Flatworms D.Arthropods E.MolluscsFeedback:Both echinoderms and vertebrates have an endoskeleton (internal skeleton).Part 5 of 8 -3.33/ 6.66 PointsQuestion 21 of 300.0/ 3.33 PointsWhat function did the oscilloscope perform in the simulation? A.It measured the time taken for the muscle to twitch. B.It displayed the number of fibers that contracted in the muscle. C.It delivered the stimulus to the muscle.Feedback:Refer to the Information box for details.Question 22 of 303.33/ 3.33 PointsIf a muscle did not twitch after three tries at the first stimulus level what was the next step in the procedure? A.Replace the muscle with a different type. B.Set the stimulus to 10.0 volts and apply the stimulus three times. C.Apply the 80g weight and stimulate again at the same voltage. D.Increase the voltage of the stimulus by 0.5 volts and stimulate the muscle again.Feedback:Good job!Part 6 of 8 -9.99/ 9.99 PointsQuestion 23 of 303.33/ 3.33 PointsWhich of the following muscles contract and relax slowly? A.Stretch B.Skeletal C.Cardiac D.SmoothFeedback:Good job!Question 24 of 303.33/ 3.33 PointsWhich of the following organs does not have smooth muscle? A.Heart B.Bladder C.Trachea D.IntestinesFeedback:Good job!Question 25 of 303.33/ 3.33 PointsThe strength of a muscles’ contraction is determined by which of the following? A.Gender and age B.The amount of time the muscle is contracted C.Number of muscle fibers that respond D.The length of the muscleFeedback:Good job!Part 7 of 8 -9.99/ 9.99 PointsQuestion 26 of 303.33/ 3.33 PointsRank the types of muscle in order of size of muscle overload (lowest to highest). A.Calf, thigh, lower forelimb, upper forelimb B.Upper forelimb, lower forelimb, thigh, calf C.Thigh, calf, upper forelimb, lower forelimb D.Lower forelimb, upper forelimb, calf, thighFeedback:Good job!Question 27 of 303.33/ 3.33 PointsIt can be concluded from the data from the simulation that different muscle types: A.Cannot contract under 5 grams of workload B.Have different thresholds of stimulation C.Will only contract at 5.0 volts of stimulation or higher D.Have the same thresholds of stimulationFeedback:Good job!Question 28 of 303.33/ 3.33 PointsThe lower forelimb muscle was the smallest muscle. Its threshold stimulus was the smallest at ____ and its point of workload overload was the smallest at _______. A.2.0 volts, 20 grams B.2.0 grams, 20 volts C.20 grams, 2.0 volts D.20 volts, 2.0 gramsFeedback:Good job!Part 8 of 8 -6.66/ 6.66 PointsQuestion 29 of 303.33/ 3.33 PointsDefine two of the following: “all or none†response, oscilloscope,”>All or none response: When a muscle fiber is stimulated, either it gives full response or none at all.Question 30 of 303.33/ 3.33 PointsExplain how biologists can determine the muscle’s threshold of stimulation under specific”>

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