Which layer of the digestive tract wall contains epithelial cells including goblet cells that secrete mucus?
A. Muscularis
B. Submucosa
C. Serosa
D. Mucosa
Answer: D
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What is the best definition of the "receptive field" of an afferent neuron?
A. The area of the body that, when stimulated, leads to activity in that particular afferent neuron B. The type of stimulus energy to which the afferent neuron is most sensitive C. The area of the cerebral cortex in which information from that afferent neuron is initially received D. The number of interneurons with which the central process of the afferent neuron makes synaptic contact via divergence E. All of the interneuron cell bodies and dendrites onto which the afferent neuron synapses
When blood glucose levels fall,
A) insulin is released. B) glucagon is released. C) peripheral cells take up more glucose. D) protein synthesis increases. E) calcitonin is secreted.
Gated channels for sodium ions may include
A) chemical gates, which respond to ligands. B) mechanical gates, which respond to pressure. C) voltage gates, which respond to electrical signals. D) All of the answers are correct. E) None of the answers are correct.
The type of most cells that form the strata in the epidermis are
A) adipocytes. B) keratinocytes. C) fibroblasts. D) melanocytes. E) dendritic cells.