Put the steps of impulse transmission at a synapse in the correct order. 1. Action potential promotes the entry of calcium ions into the synaptic knob. 2. Neurotransmitter diffuses across the synaptic cleft. 3. The presynaptic membrane releases neurotransmitter by exocytosis. 4. Nerve impulse travels along the axon to the synaptic terminal. 5. Neurotransmitter binds to receptors on the
postsynaptic membrane. 6. Secretory vesicles containing neurotransmitter fuse with the presynaptic membrane.
A) 4, 1, 6, 2, 3, 5
B) 4, 1, 6, 3, 2, 5
C) 1, 4, 6, 3, 2, 5
D) 3, 2, 4, 1, 6, 5
B
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A. Tongue B. Appendix C. Gall bladder D. Salivary gland E. Pancreas
The primary means by which individual substances are exchanged between the blood and surrounding tissues is by bulk flow
Indicate whether the statement is true or false
Cite the functions of sensory receptors in the saccule and utricle
A) Sensory receptors in the saccule and utricle are sensitive to high pitched sounds. B) Sensory receptors in the saccule and utricle are sensitive to low pitched sounds. C) Sensory receptors in the saccule and utricle are sensitive to high pitched and low pitched sounds, respectively. D) Sensory receptors in the saccule and utricle are sensitive to rotation. E) Sensory receptors in the saccule and utricle are sensitive to changes in horizontal movement and vertical movement, respectively.
Red blood cells make up about ____% of the volume of blood cells
a. 95 b. 50 c. 35 d. 75