What is the primary function of the vitreous body?
A. It refracts light.
B. It maintains the round shape of the eyeball.
C. It provides attachment and support for the lens.
D. It absorbs scattered light rays.
E. It provides nourishment for the retina.
B. It maintains the round shape of the eyeball.
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The cells that give rise to osteoblasts are __________ cells.
Fill in the blank(s) with the appropriate word(s).
The QRS complex in an electrocardiogram best represents:
A. depolarization of the atria B. repolarization of the atria C. depolarization of the ventricles D. repolarization of the ventricles E. the delay at the AV node
Both the American horned lizards (Phyrnosoma, Phrynosomatidae) and the Australian thorny devil (Moloch horridus, Agamidae) eat ants almost exclusively
Suggest an explanation for the convergence of ant-eating specialists in these two families on a short-legged, stocky body form and a spine-covered body.
These nuclei are located in the lateral horns and innervate smooth muscle, cardiac muscle, and glands.
A. Somatic sensory nuclei B. Sensory nuclei C. Somatic motor nuclei D. Visceral sensory nuclei E. Autonomic motor nuclei