Bios 255 a - Study guides, Class notes & Summaries

BIOS-255:| BIOS 255 ANATOMY & PHYSIOLOGY III WITH LAB EDAPT WEEK 3 EXAM QUESTIONS WITH 100% CORRECT ANSWERS| GRADED A+

Describe the control of the dorsal respiratory group neurons on respiration - ANS: -Modifies the rate and depth of breathing -controls the basic rhythm of breathing by triggering inspiratory impulses -neurons send impulses to the motor nerves of diaphragm and external intercostal muscles Describe the processes of exhalation and inhalation during eupnea (and identify the muscles involved). - ANS: -inspiratory neurons fire for about 2 sec, expiratory neurons fire for about 3 sec -Normal quie...

Refractory period in the action potential of cardiac muscle cells. - ANS: -absolute refractory period of 250 ms -Prevents wave summation and tetanus which would stop the pumping action of the heart synovial fluid functions - ANS: -nourishes the articular cartilages -removes their wastes -makes movements at synovial joints almost friction-free pleural fluid function - ANS: -acts as a lubricant that enables the lungs to expand and contract with minimal friction pericardial fluid functi...

BIOS-255:| BIOS 255 ANATOMY & PHYSIOLOGY III WITH LAB EXAM 1 QUESTIONS WITH 100% CORRECT ANSWERS| GRADED A+

What does a synergistic muscle do - ANS: also called fixators, act around a joint to help the action of an agonist muscle. (iliacus, psoas major, and rectus femoris) hamstring group - ANS: biceps femoris, semitendinosus, semimembranosus sodium-potassium ion - ANS: Neuron has a negative charge at rest. Slightly positive charge sodium ions on the outside. During the firing, sodium ions rush into the axon causing depolarization. Potassium ions rush out of the axon causing it to return to i...