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Study Stack Set 2
SCI 221-07
| Question | Answer |
|---|---|
| The difference between sodium and potassium in the generation of action potential is that: | Sodium causes depolarization of the cell membrane, and potassium causes repolarization of the cell membrane. |
| An ion channel that opens in response to a sensory stimulus is | a stimulus-gated channel |
| The active transport mechanism in the plasma membrane that transports sodium and potassium ions in opposite directions and at different rates is the | sodium-potassium pump |
| Both sympathetic and parasympathetic divisions are tonically active, which means they | continually conduct impulses to autonomic effectors |
| The somatic motor system includes all the _____ motor pathways _____ the CNS. | voluntary; outside |
| The effect of sympathetic stimulation on the urinary bladder is | relaxation |
| A reflex consists of either a muscle contraction or a | glandular secretion |
| In the extrinsic pathway of stage 1 of the clotting mechanism, chemicals released from damaged tissues trigger the cascade of events that ultimately result in the formation of | prothrombin activator |
| The type of membranous tissue that lines the heart and blood vessels is the | endothelium |
| The heart has its own special covering, a loose-fitting inextensible sac called the | pericardium |
| Which division of the autonomic nervous system sends fibers to the heart? | sympathetic and parasympathetic |
| Which two factors promote the return of venous blood to the heart? | blood-pumping action of respirations and skeletal muscle contractions |