What purpose does the coronary circuit serve?
A. None; it is a vestigial set of vessels.
B. It delivers 1/20 of the body's blood supply to the heart muscle itself.
C. It delivers blood to the anterior lung surface for gas exchange.
D. It feeds the anterior thoracic wall.
Answer: B. It delivers 1/20 of the body's blood supply to the heart muscle itself.
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Place the following events of excitation in the correct order
1. ion channels on the sarcolemma open and sodium ions enter the muscle fiber 2. the entry of sodium ions into the muscle fiber depolarizes the sarcolemma locally 3. acetylcholine is released from vesicles in the motor neuron into the synaptic cleft 4. an action potential arrives at the axon terminal of a motor neuron 5. acetylcholine binds to ligand-gated sodium ion channels in the motor end plate A) 2, 4, 3, 5, 1 B) 3, 4, 5, 1, 2 C) 4, 5, 3, 2, 1 D) 4, 3, 5, 1, 2
Your colleague sees a pelvic radiograph you have just taken of a patient and comments that your patient must have been a female. Provide three or more characteristics of the female pelvis to support how your colleague recognized the sex of your patient
from her radiograph. What will be an ideal response?
In the diagram, where is the lacrimal bone?
a) E b) F c) G d) H e) I
This figure shows the muscles of facial expression. What muscle does number 8 indicate?
A. Mentalis B. Levator labii superioris C. Risorius D. Sternocleidomastoid E. Depressor labii inferioris