The anterior communicating artery of the cerebral arterial circle connects the
A. anterior cerebral arteries.
B. posterior communicating artery and the middle cerebral artery.
C. basilar artery and the internal carotid artery.
D. vertebral arteries.
E. posterior cerebral arteries.
Answer: A
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The rate of diffusion for water-soluble substances through a membrane decreases as
a. their concentration gradient increases b. their molecular weight increases c. the number of cholesterol molecules in the membrane increases d. the membrane's surface area increases e. the number of membrane carbohydrates increases
The greater the ____________________ of the plasma membrane for a given ion, the greater the tendency for that ion to drive the membrane potential toward the ion's ____________________ potential
Fill in the blank(s) with correct word
If your lab partner measures the angle formed between your arm and your shoulder as you adduct your arm such that it crosses anterior to your torso, which type of flexibility is being measured?
A) static B) dynamic C) goniometer D) muscle
The onset of puberty is triggered by an increase in:
A. sensitivity of the gonads to pituitary gonadotropins. B. sensitivity of the pituitary to GnRH. C. GnRH secretion. D. sensitivity of the hypothalamus to negative feedback by sex steroids. E. sensitivity of the pituitary to negative feedback by sex steroids.