What are the main target tissues for glucagon?
A. Adipose tissue and liver
B. Pancreas and liver
C. Skeletal muscle and liver
D. Liver and kidneys
Answer: A
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Using Figure 26.1, match the following:
1) Stem cell.
2) First cells with n number of chromosomes.
3) Type B spermatogonia.
4) Early spermatids.
5) Primary spermatocyte.
Cones have higher acuity than rods because
a. cones respond more to long wavelengths of light b. there are three types of cones c. there is little convergence in the cone pathways within the retina d. there are more cones than rods e. the photopigment in cones breaks down more rapidly than the photopigment in rods.
Which of the following statements is true of the aortic bodies?
A. They communicate with the pons by way of the vagus nerve. B. They are baroreceptors that supply information about blood pressure to the pons. C. They are innervated by the glossopharyngeal nerves. D. They are fetal structures that enable blood to bypass the lungs. E. They are chemoreceptors that supply information about blood chemistry to the medulla oblongata.
Which of the following is NOT properly matched?
A. cervical spinal nerves: 7 pairs B. thoracic spinal nerves: 12 pairs C. lumbar spinal nerves: 5 pairs D. sacral spinal nerves: 5 pairs E. coccygeal spinal nerves: 1 pair