Which of the following factors influence cell membrane permeability?
A. Molecule size
B. Phospholipid composition of the membrane
C. Ionic charge along the membrane
D. Presence or absence of transport proteins
E. All of the choices are correct.
Answer: E
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Where is the cerebral cortex concerned with hearing located?
A. Precentral gyrus B. Occipital lobe C. Temporal lobe D. Parietal lobe E. Frontal lobe
Prostaglandins play a role in ________.
A) skeletal muscle contraction B) control of blood volume C) noninflammatory responses D) control of blood pressure
Sequence the following events involved in muscle cell contraction:
1 . Sodium channels open and sodium flows in. 2 . Impulse reaches the axon's terminal. 3 . ACh binds to receptors on the muscle cell membrane. 4 . Synaptic vesicles fuse with neuron's membrane and release ACh via exocytosis. 5 . If enough sodium moves in to the muscle cell, an impulse (action potential) develops. a. 1, 2, 3, 4, 5 b. 2, 1, 3, 4, 5 c. 2, 4, 3, 1, 5 d. 3, 4, 5, 1, 2 e. 3, 5, 2, 1, 4
What nerve mediates the receptive relaxation response?
a. vagus b. gastric c. thoracic d. lumbar e. accessory