During Gastrulation

question 82

Multiple Choice

During gastrulation,

• A)the blastomeres fuse.
• B)the placenta penetrates the endometrium.
• C)three germ layers are formed.
• D)blastomeres form.
• E)the neural tube closes.

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Definitions:

SA Node

Sinoatrial node, a group of cells located in the right atrium of the heart that generates electrical impulses to start each heartbeat.

Afterload

The pressure the heart must work against to eject blood during systole.

Extracellular

Located or occurring outside of a cell or cells, often referring to the fluid, substances, or cellular components in the space outside cells.

Heart Rate

The number of heartbeats per unit of time, usually measured in beats per minute (bpm).