You are out at night and hear a sound in the bushes. The electrical signal carrying this information to your brain is carried first by a
A. sensory neuron.
B. motor neuron.
C. interneuron.
D. glial cell.
E. All of these choices are correct.
A. sensory neuron.
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Passive molecular diffusion occurs when ____
a. the energy of ATP is added b. random collisions between molecules occurs c. there are variations in molecular sizes d. enzymes catalyze their movement e. vesicles break off from the membrane
Which one of the following organelles is involved in the production of proteins that are exported from the cell?
A) rough endoplasmic reticulum B) lysosome C) mitochondrion D) smooth endoplasmic reticulum E) centriole
Essential fatty acids that cause a decrease in blood clotting are
a. omega-3. b. omega-6. c. omega-9. d. prostacyclins.
Which of the following statements about GABA receptors is not true?
(a) They are located on postsynaptic membranes. (b) They are ligand-gated channels. (c) They inhibit synaptic signaling. (d) They promote neuronal uptake of Na+.