The head of a sperm is covered by the ________, which contains enzymes that help penetrate the layers of cells surrounding the egg
Fill in the blank(s) with correct word
acrosome
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When light energy hits a photopigment, the molecule
A) is separated from the plasma membrane. B) is destroyed, setting off a series of chemical reactions. C) forms an enzyme. D) changes shape, setting off a series of chemical reactions. E) generates an action potential.
A muscle fiber from the latissimus dorsi (one of the back muscles) of a chimpanzee has a lot of mitochondria and myoglobin and can generate relatively little force. Which type of muscle fiber is being described?
A) a fast, fatigue-resistant fiber B) a fast, fatigue-susceptible fiber C) a slow, fatigue-resistant fiber D) a slow, fatigue-susceptible fiber
Hormones made from variations on the cholesterol molecule are:
A) glycolipid hormones. B) protein hormones. C) peptide hormones. D) glycoprotein hormones. E) steroid hormones.
All of the following are associated with subacute endocarditis, except
A) Signs and symptoms include fever, heart murmur, and possible emboli. B) It occurs in patients that have prior heart damage. C) Bacteria colonize previously damaged heart tissue resulting in vegetation. D) It is caused by immune system autoantibodies that attack heart and valve tissue. E) Oral bacteria get introduced by dental procedures to the blood.