A seesaw is an example of which class of lever?
A. 1st class
B. 2nd class
C. 3rd class
D. not a lever
A. 1st class
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Which of the following structures originates as an evagination from the floor of the pharynx, moves into the neck, and loses its connection with the pharynx?
A. Pancreas B. Adenohypophysis C. Parathyroid glands D. Adrenal medulla E. Thyroid gland
Choose the correct description of the Na+/K+ pump.
A. It actively transports 2 potassium ions out of the cell. B. It actively transports 3 sodium ions into the cell. C. It is an example of primary active transport. D. It generates a positive membrane potential.
During the cardiac cycle,
A) the P wave of the ECG occurs between the first and second heart sounds. B) the QRS complex of the ECG precedes the increase in ventricular pressure. C) the second heart sound occurs during atrial systole. D) the second heart sound coincides with the QRS complex of the ECG. E) both QRS complex of the ECG precedes the increase in ventricular pressure and second heart sound coincides with the QRS complex of the ECG.
In order to maintain proper health, total dietary fat intake should not exceed ________ calories for a 2000 calorie diet.
A. 800 B. 100 C. 400 D. 600