What are ryanodine receptors? What type of tissue are they present in? Are all ryanodine receptors regulated in the same way? Explain your answer.
What will be an ideal response?
Ryanodine receptors are calcium channels, present in cardiac and skeletal muscle tissue. In cardiac muscle they are regulated by calcium, resulting in calcium-induced calcium release from the SR. In skeletal muscle, they are regulated by mechanical linkage to voltage-sensing receptors in SR, thus they are indirectly voltage-regulated.
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A. cervical region B. supratrochlear region C. inguinal region D. thoracic region
Compared to breast milk, colostrum contains
A. more fat and more immunoglobulins. B. more fat but less immunoglobulins. C. less fat but more immunoglobulins. D. less fat and less immunoglobulins.
Aldosterone
a. enhances the ability of the kidneys to eliminate excess K+ b. directly promotes H2O conservation by the kidneys c. secretion is inhibited by angiotensin II d. is not a steroid e. is produced in the adrenal medulla
Where do second-order neurons for hearing terminate?
A. Primary auditory cortex B. The superior olivary nucleus of the pons C. The cochlear nucleus of the medulla oblongata D. The cochlear nerve E. The lateral geniculate nucleus of the thalamus