Which endocrine gland stores its product in follicles?
A. The thyroid gland
B. The adrenal medulla
C. The thymus gland
D. The pineal gland
E. The anterior pituitary gland
A. The thyroid gland
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Contraction of which muscle normally accounts for around 75% of the air movement in normal quiet breathing?
A) diaphragm B) rectus abdominis C) internal intercostals D) external intercostals E) internal obliques
An inflammation of the membrane that lines the heart and covers the valves is called
Fill in the blank(s) with the appropriate word(s).
The airplane you are riding suddenly depressurizes at 10,000 feet in the air. This causes the PO2 of the airplane's air to drastically decrease. You pass out before you can put on your oxygen mask. After a few seconds, the PO2 in your alveoli rapidly drops to 60 mmHg instead of the normal 104 mmHg. How will this affect blood gas concentrations?
A. Blood PO2 will become low and much less oxygen will be delivered to tissues until cabin pressure returns. B. PO2 in the alveoli will be so low that oxygen will diffuse from hemoglobin into the alveoli, where it is exhaled. This causes blood oxygen concentrations to drop throughout the body. C. PO2 in the alveoli will be too low for gas exchange to even occur, so tissues will receive no oxygen during the depressurization event. D. Blood PCO2 will increase because the air contains less oxygen.
Which of the following muscles is named for its shape?
A. Pectoralis major B. Pectoralis minor C. Adductor pollicis D. Trapezius E. Vastus lateralis