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ovarian cycle
In the ________, the first 14 days is called the _ phase.
Progesterone
________ is necessary to maintain a pregnancy, it stimulates the uterus to keep secreting substances to help maintain fetus.
% %
A) Polyspermy is common and will usually result in twins B) The first sperm cell that reaches the egg will penetrate the corona radiata of the egg C) Fusion of a sperm cell with an oocyte occurs as soon as the sperm cell reaches the egg ________ D) ________ Enzymes on the surface of the sperm cell head help penetrate the corona radiata of the egg.
___
________ are muscular tubes that undergo peristalsis to propel urine toward the urinary bladder.
blood glucose
A) Regulates ________ and produces hormones % % B) % % Formation of feces C) Helps maintain homeostasis by controlling the composition and pressure of blood D) Discharge of wastes to the external environment.
___
In active transport, ________ describes a single membrane protein that transports two molecules in opposite directions.
