____ 22. The action potential a. is a chemical that diffuses across a synapse. b. transmits information...

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Biology

22. The action potential
a. is a chemical that diffuses across a synapse.
b. transmits information from the cell body to the axon through thesynapse.
c. is an electric current that passes through the axon and causesthe release of neurotransmitters into
the synapse.
24. Humans need _ to move parts of the appendicularskeleton, such as the arm.
a. muscles
b. bones
c. joints
25. An MRI reveals that a patientâ€™s heart valves are inflamed.Doctor A says that the patient has coronary artery
disease. Doctor B says that the patient has rheumatic fever. Whichdoctor is most likely correct?
a. Doctor A, because the heart valves pump blood into coronaryarteries.
b. Doctor B, because antibodies attack heart valves in rheumatoidfever.
c. Doctor A, because arterial clogging leads to hear valvefatigue.
26. Which lists the layers of skin from outer to inner?
a. dermis, melanin
b. epidermis, dermis
c. melanin, epidermis
27. A doctor find that her patientâ€™s white blood cell count ishigher than normal. What does this most likely
indicate?
a. The patient is healthy.
b. The patient has an infection.
c. The patientâ€™s kidneys are functioning poorly.

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4.3 Ratings (745 Votes)

Answer 22 It is change in membrane potential due rapid influx of positive ions like Na ions into intracellular fluid from extracellular fluid in neuron and muscle cell It is near about 30mV When action potential reached at synaptic See Answer

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