Answer the following statements true (T) or false (F)
1. In humans, melatonin may inhibit sexual maturation.
2. The antagonistic hormones that regulate the blood calcium level are calcitonin-parathormone.
3. The hormone that raises blood sugar levels is insulin.
4. Addison’s disease is due to a deficit output of glucocorticoids only.
5. Both "turn on" factors (hormonal, humoral, and neural stimuli) and "turn off" factors (feedback inhibition and others) may be modulated by the activity of the nervous system.
1. TRUE
2. TRUE
3. FALSE
4. FALSE
5. TRUE
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Which structure separates the two halves of the rectus abdominis muscle?
A. Linea albuginea B. Linea alba C. Ansa cervicalis D. Thoracodorsal fascia E. Flexor retinaculum
The periarterial lymphatic sheath and the lymphatic nodules are part of the red pulp of the spleen.
Answer the following statement true (T) or false (F)
Which of the following anchors the conceptus to the uterine wall?
A. Yolk sac B. Syncytiotrophoblast C. Cytotrophoblast D. Blastomere E. Embryoblast
Blood is moved through the vascular system by
A. pressure gradients created by the heart. B. peristalsis caused by smooth muscle in the blood vessel walls. C. valves in the wall of the blood vessels. D. osmotic pressure. E. viscosity of the blood.