The lens of the eye loses dowith age and cannot change from viewing distant objects and close objects as readily as before.
Answer the following statement(s) true (T) or false (F)
Ans: False
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Homeotic genes activate other genes that determine the ____________ of each segment
A. segment B. parasegment C. morphological characteristics D. zygotic
Without the ________, the semen would not naturally be able to counteract the acidity of the vagina
A) glans penis B) prostate C) seminal vesicles D) interstitial cells
Which of the following statements regarding trachoma is FALSE?
A) It is the leading cause of nontraumatic blindness in humans. B) It is most often a disease of adults who suffer from sexually transmitted chlamydia. C) It leads to corneal scarring. D) It first infects the conjunctiva and kills cells there. E) Infants may contract the disease while passing through an infected birth canal.
Indicate whetherthe statements below are true or false. If a statement is false, explain why it is false
A. Neurotransmitters are small molecules released into the synaptic cleft after the fusion of synaptic vesicles with the presynaptic membrane. B. Action potentials are usually mediated by voltage-gated Ca2+ channels. C. Voltage-gated Na+ channels become automatically inactivated shortly after opening, which ensures that the action potential cannot move backward along the axon. D. Voltage-gated K+ channels also open immediately in response to local depolarization, reducing the magnitude of the action potential.