Which is correct about different tastes on the tongue?
A. (A) bitter is located on the tip of the tongue
B. (B) sweet is located on the root of the tongue
C. (C) salty is located on the side of the tongue
D. (D) there is no tongue map
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Why can we discriminate so many different odors?
A. (A) because each odorant can activate all receptors
B. (B) because different odorants are detected by different combinations of receptors
C. (C) because one glomerulus is responsible for one odorant
D. (D) because new odor stimuli evoke formation of new odorant receptors
Which is wrong about the structure of a sarcomere?
A. (A) thick filament is made of myosin
B. (B) thin filament is made of actin
C. (C) bridge is formed by contacting actin and myosin tail
D. (D) sarcomere is the unit of myofibril
Which is released from the sarcoplasmic reticulum during muscle contraction?
A. (A) potassium
B. (B) sodium
C. (C) chloride
D. (D) calcium
Which two brain areas are important in adaptation of posture?
A. (A) medulla and nucleus ambiguus
B. (B) hippocampus and basal ganglia
C. (C) prefrontal cortex and thalamus
D. (D) basal ganglia and cerebellum
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