Ventilation is increased the most by a small
a. increase in arterial PCO2.
b. decrease in arterial PCO2.
c. increase in arterial PO2.
d. decrease in arterial PO2.
e. none of these answers.
A
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Dense connective tissue that covers the ovary is called the
A) ovarian hilum. B) fibrous capsule. C) tunica vaginalis. D) broad ligament. E) tunica albuginea.
The second thoracic spinal nerve exits the spinal column through the
A. vertebral canal of vertebrae T1, T2, and T3. B. sacral hiatus. C. intervertebral foramen between vertebrae T2 and T3. D. intervertebral foramen between vertebrae T1 and T2.
Which of the following events occurs first?
A) The myosin head binds ATP and detaches from actin. B) The myosin head pivots toward the M line. C) Calcium ions are released from the sarcoplasmic reticulum. D) Calcium binds to troponin. E) Myosin cross-bridges attach to actin.
Intervertebral discs are absent between these vertebrae
A) T1 and T2 B) atlas and axis C) L5 and S1 D) T12 and L1