When light strikes a photoreceptor it
A. hyperpolarizes and releases less neurotransmitter.
B. hyperpolarizes and releases more neurotransmitter.
C. deporlarizes and releases more neurotransmitter.
D. depolarizes and releases less neurotransmitter.
Answer: A
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The hypoblast layer of the blastodisc is made of
A. cuboidal cells and forms during the pre-embryonic period. B. cuboidal cells and forms during the fetal period. C. columnar cells and forms during the morula stage. D. columnar cells and forms during gastrulation.
A __________ is a procedure where a temporary opening is made in the trachea to allow airflow when the upper airway is obstructed.
Fill in the blank(s) with the appropriate word(s).
A(n) ________ test is a blood test is for prostate cancer.
A. PAP B. SAP C. PSA D. ASP
Which of the following is NOT a sheep production system?
a. range band method c. feeder sheep method b. confinement method d. farm flock method