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Question
In the fast block to polyspermy, binding of sperm opens up __________ channels, which depolarizes the egg membrane and __________.
A. Na+; prevents the entrance of any more sperm
B. Na+; prevents the entrance of more Na+
C. Na+; prevents the entrance of Ca2+
D. Ca2+; prevents the entrance of any more sperm
E. Ca2+; prevents the entrance of more Na+
Answer
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Related questions
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The sympathetic chain of ganglia is found at the __________ levels of the spinal cord.
A. cervical and thoracic
B. thoracic and lumbar
C. thoracic, lumbar and sacral
D. sacral, lumbar and coccygeal
E. cervical, thoracic, lumbar, sacral, and coccygeal
Q:
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A. anger
B. digestion
C. exercise
D. stress
E. arousal
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Which of the following statements is true regarding parasympathetic tone?
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B. It accelerates the resting heart rate above its intrinsic rate.
C. It might increase or decrease heart rate depending on the situation.
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Which of the following cranial nerves is mispaired?
A. Abducens - V
B. Oculomotor - III
C. Facial - VII
D. Accessory - XI
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Exhausted from studying all night, you briefly close your eyes and your mind starts to wander. Which brain waves would be most predominant in an EEG?
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B. Beta
C. Delta
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A. Dural sinus
B. Lateral ventricle
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D. Subarachnoid space
Q:
The pyramidal cells of the precentral gyrus are called __________ neurons.
A. stellate
B. third-order
C. first-order
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E. lower motor
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Which of the following is correct regarding the occipital lobe?
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B. It is the principal visual center of the brain.
C. It is the primary site for receiving and interpreting signals from the general senses.
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Planning, motivation, and social judgment are functions of the brain associated with which part of the cerebrum?
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B. Tegmentum in the midbrain
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The __________ function(s) in visual attention, such as to look and follow the flight of a butterfly.
A. inferior colliculi
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C. tegmentum
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A. To regulate the chemical environment of the nervous tissue
B. To rinse metabolic wastes from the nervous tissue
C. To provide oxygen and nutrients to the nervous tissue
D. To protect the brain from striking the cranium when the head is jolted
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From superficial to deep, the meninges occur in which order?
A. Dura mater, pia mater, arachnoid
B. Dura mater, arachnoid, pia mater
C. Pia mater, dura mater, arachnoid
D. Pia mater, arachnoid, dura mater
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Q:
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A. Negative feedback inhibition
B. The antagonistic effect
C. Up-regulation
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A. G protein activates adenylate cyclase
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. The __________ secrete(s) __________, which promotes Na+ and water retention.
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