Which of the following hormones is secreted in the pituitary gland and controls melanin production during fetal development, in young children, in pregnant women, and in some disease states?
a. melatonin
b. melanocyte-stimulating hormone
c. oxytocin
d. luteinizing hormone
Ans: b. melanocyte-stimulating hormone
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Voltage-regulated channels are located
A) in the membranes of dendrites, in the membranes of axons, and on the neuron cell body. B) within the cytosol only. C) on the neuron cell body only. D) in the membranes of dendrites only. E) in the membranes of axons only.
Which of the following muscles produces plantar flexion of the foot?
A. Soleus B. Quadratus plantae C. Fibularis tertius D. Flexor digitorum brevis E. Tibialis anterior
A young patient has developed a disease that is causing her elastic fibers to break down. The tunica media of which artery is most affected by this disease?
A) brachial B) aorta C) arteriole D) renal
Which of these would tend to increase ventilation?
A. lower than normal arterial PCO2 B. higher than normal arterial pH C. breathing carbon monoxide D. breathing air with increased PCO2 E. iron-deficiency anemia