Cardiac cells contain _____ and _____, the proteins responsible for their contractile nature
a. Z-disc, A-band c. I-band, M-band
b. actin, myosin d. renin, angiotension-converting enzyme
B
Actin and myosin form cross-bridges, allowing myocardial contraction to take place. Z-disc, A-Band, I-band, and M-band are all portions of the sarcomere functional unit to promote contraction in the heart. Renin converts the protein angiotensinogen to angiotensin I. When angiotensin I passes through the pulmonary vascular bed, it is activated by angiotensin-converting enzyme to become angiotensin II.
You might also like to view...
Which of these body fluid compartments contains the largest amount of water in the body?
a. intravascular c. intracellular b. interstitial d. extracellular
A nurse is preparing to teach a group of elementary students, and she decides to write all of the objectives at the knowledge level. The objectives would most likely begin with which of the following words? Select all that apply
a. Identify d. Name b. Construct e. Compare c. List f. Select
What is the purpose of the Omaha System?
A) It is a classification system that promotes documentation of client care. B) It articulates nurses' contributions, activities, and outcomes with regard to caring for critically ill patients. C) It explains how clients cognitively process illness-related stimuli and construct meaning in these events. D) It defines comfort within nursing practice to meet the basic human needs of relief and comfort.
When the heart muscle is contracting, the diastolic blood pressure is measured
True False