When a hormone binds to a membrane-bound receptor and activates G proteins,
A. cyclic AMP production may be increased.
B. DAG may be activated.
C. IP3 may be activated.
D. ion channels could be opened.
E. All of the choices are correct.
Answer: E
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Red-green color blindness is a recessive, X-linked trait represented as Xc. (Normal color vision is represented as XC.) If a daughter has red-green color blindness, what must the genotypes of her parents be?
What will be an ideal response
The focal point is the
A) Point between the center of the lens and the retina. B) Point where light waves converge after passing through the lens. C) Small region in the center of the retina responsible for high-acuity vision. D) Narrow band of the electromagnetic spectrum that contains visible light.
A human male is generally considered sterile if his ejaculation contains less than:
A) 100,000,000 sperm B) 20,000,000 sperm C) 100,000 sperm D) 1,000 sperm
All of the following provides flexion of the knee except
A) biceps femoris. B) semimembranosus. C) semitendinosus. D) rectus femoris. E) sartorius.