Explain how the nervous system and hormones regulate the secretion of gastric juice. What will be an ideal response?
Concepts to Consider: Smelling or tasting food causes the brain to send messages to gastric
glands in the stomach, stimulating them to secrete. When food distends the stomach, stretch
receptors send messages to the medulla, which sends messages to the endocrine cells of the
stomach that secrete the hormone gastrin. Gastrin is absorbed into the blood, returns to the
stomach, and stimulates gastric juice release, gastric emptying, and intestinal motility
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Which occurs last in the stages of infection and recovery?
a. inflammation b. attack by lysozymes in sweat and saliva c. antibody-mediated immune response d. production of mucous e. production of interferon
Tay-Sachs disease is a(n) __________ disease that results in blindness, mental retardation, and death
due to __________. a. sex-linked; the absence of one of the sex chromosomes b. autosomal recessive; accumulation of lipids in brain cells c. X-linked; accumulation of lipase in cells of sweat glands d. autosomal; the inability to break down amylase in the intestines e. autosomal dominant; accumulation of mucus in the lung
Which one of the following processes is depicted in the figure above?
A) hyperpolarization of an axon bulb B) repolarization of a neuron C) synaptic transmission D) inhibition of a presynaptic neuron E) antagonistic effects of the parasympathetic and sympathetic nervous systems
Is mitosis asexual or sexual reproduction?
A. asexual B. sexual