Which of the following is a primary lymphatic organ?
A. Thymus
B. Tonsil
C. Spleen
D. Lymph node
Answer: A
Anatomy & Physiology
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Sheaths of ________ cells often enclose the larger axons outside of the brain and spinal cord.
Fill in the blank(s) with the appropriate word(s).
Anatomy & Physiology
Nicotinic receptors are activated by the tobacco plant derivative nicotine, whereas muscarinic receptors are activated by the mushroom poison muscarine
a. True b. False Indicate whether the statement is true or false
Anatomy & Physiology
_____ is redness and irritation caused by an injury or abnormal stimulation by a physical, chemical, or biologic agent. Select one:
a. erythema b. allergy c. inflammation d. immunity
Anatomy & Physiology
Spermatogenesis is regulated by ________.
A. progesterone B. FSH C. testosterone and its derivatives D. growth hormone
Anatomy & Physiology