Flexion creases are where
A. arrector pili muscles flex skin hairs.
B. skin attaches to flexor muscles.
C. skin does not have a dermal layer.
D. skin attaches to joints of the fingers.
Answer: D
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How are endocrine glands and hormones involved in homeostatic reflexes?
A. Endocrine glands can be efferent pathways, and hormones can be effectors. B. They are not involved; reflexes only involve actions of the nervous system. C. Endocrine glands can be receptors, and hormones can be effectors. D. Endocrine glands can be integrating centers, and hormones can be efferent pathways. E. Endocrine glands are not part of reflex mechanisms, but hormones can be afferent or efferent pathways.
The posterior pituitary
a. is composed of nervous tissue. b. stores anterior pituitary hormones, which are released into the blood upon hypothalamic stimulation. c. synthesizes and secretes vasopressin and oxytocin. d. both (a) and (c) above. e. all of these answers.
The portion of the digestive tract that receives food directly from the oral cavity is the ________.
A. esophagus B. larynx C. laryngopharynx D. nasopharynx E. oropharynx
The enzyme ________ catalyzes the formation of H2CO3 from CO2 and water.
A. renin B. nitric oxide synthase C. carbonic anhydrase D. lactate dehydrogenase