The cavity that contains only the heart is the
A) thoracic cavity.
B) pericardial cavity.
C) mediastinum.
D) pleural cavity.
E) anterior cavity.
Answer: B
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The ischemic phase of the uterine cycle is brought on by vascular spasms, which in turn are a response to what?
A. Ovulation B. Menstruation C. Rising LH level D. Falling progesterone level E. Rising progesterone level
If a cell begins to swell after being placed into a salt solution, the salt solution must have a lower osmotic pressure than the cytosol
Indicate whether the statement is true or false
A large decrease in pH results in increased H+ binding to an enzyme, which can disrupt electrostatic interactions within the molecule.
Answer the following statement true (T) or false (F)
The first step in the process of photoreception is
A) the bleaching of rods. B) the bleaching of cones. C) absorption of a photon by a visual pigment. D) inhibition of the sodium pumps. E) release of neurotransmitter.