BIOL 235 MIDTERM 2 QUESTIONS AND
CORRECT ANSWERS AND RATIONALES
ALREADY GRADED A
a lever is acted on at two different points by two different forces that are called the - answer>> effort and load what is the action of gluteus maximus - answer>> extends thigh at hip joint and laterally rotates thigh the SCM flex the neck, and the splenius cervicis muscles extend. what is the relationship between these muscles and bowing your head? - answer>> SCM is the prime mover, splenius cervici is the antagonist if you dissect on the lateral side of the abdomen, what abdominal muscles in order from superifical to deep will the scalpel go through - answer>> external oblique, internal oblique, transverus abdomins which of the following actions does the deltoid perform? - answer>> abduction of the arm which of the following muscles is used in forceful breathing - answer>> diaphragm, external and internal intercostasls Chapter 12 - answer>> the autonomic nervous system is part of the - answer>> PNS Which NERVE potential travels the longer distance in a typical sensation? - answer>> nerve action potential Na/K-Atpase is considered to be an electrogenic pump because - answer>> it contributes to the negativity of the resting membrane potential a depolarizing graded potential - answer>> makes the membrane less polarized the nervous system can distingisuh between a light touch and a heavier touch because - answer>> the frequency of impulses sent to sensory centers changes serotinin is an example of a - answer>> biogenic amine 1 / 2
This type of neural circuit consists of a single presynaptic neuron synapsing with several postsynaptic neurons. - answer>> diverging circuit during an action potential absolute refractory period, a second stimulus of sufficient strength will produce another action potential - answer>> false Gray matter has its distinctive color due to myelination of axons. - answer>> false which corrects describes a function of nervous system - answer>> sensory: detects changes which of the following is true of a synapse - answer>> A synapse is the site where two neurons or a neuron and an effector communicate.this type of neuron has one dendrite and one axon emerging from the cell body - answer>> bipolar neuron a polarized cell - answer>> all these choices are correct diffusion, enzymatic degradation, uptake into cells - answer>> remove a neurotransmitter Chapter 13 - answer>> where are the spinal mengines located - answer>> covering the spinal cord the spinal cord ends between the first and second lumbar vertebra, this area is called the
- answer>> conus medullaris
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a mixed spinal nerve has - answer>> a posterior and anterior root intercostal nerves originate primarily from which area of the spine - answer>> thoracic If these structures were severed, the nerve impulses from pain and stretch receptors would not reach the CNS. - answer>> posterior root of spinal nerves which of the following are sensory tracts - answer>> anterior spinothalamic and posterior columns which statement best describes reciprocal innervation - answer>> relaxation of antagonist at the same time of contraction of agonist