Cytoplasm is composed of water and organic and inorganic chemicals.
Answer the following statement true (T) or false (F)
True
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The adrenal medulla is important to the sympathetic branch of the autonomic nervous system because
A) it is a source of catecholamines and it is considered a modified sympathetic ganglion. B) it is a source of catecholamines. C) it is considered a modified sympathetic ganglion. D) it is a source of catecholamines, it is considered a modified sympathetic ganglion, and it releases epinephrine and norepinephrine directly into the blood. E) it releases epinephrine and norepinephrine directly into the blood.
What provides toughness to the dermis and holds water in this skin layer?
A) Merkel cells B) collagen fibers C) melanocytes D) elastic fibers E) epidermis dendritic cells
Which system is a functional system, not an organ system in the anatomical sense, that consists of innate and adaptive defense mechanisms?
A) respiratory system B) lymphatic system C) endocrine system D) immune system E) cardiovascular system
What is the first structure of a reflex arc?
A. Motor neuron B. Receptor C. Effector (muscles or glands) D. Sensory neuron