The process of forming three germ layers from the embryonic disk is called ________.
A. gastrulation
B. fertilization
C. differentiation
D. meiosis
E. implantation
Answer: A
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Which of the following are triggers for ion channels to open?A) Ligand bindingB) Change in membrane potentialC) Stretching of membraneD) Movement of solutes across the membraneE) Change in water molecule concentration
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_______ nerves are composed of preganglionic sympathetic axons that did not synapse in a sympathetic ganglion
Fill in the blank with correct word.
The process of spermiogenesis produces
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Pectoralis major originates on the ________ and inserts in the intertubercular sulcus of the humerus
A) lateral aspect of ribs 2 through 5 B) anterior surface of the scapula C) the clavicle, acromion, and spine of the scapula D) clavicle and sternum