The surface of immune system ____ contains receptors for a variety of central nervous system chemical messengers.
A. sex hormones growth
B. hormones catecholamines
C. lymphocytes
D. antibodies
Ans: C. Lymphocytes
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Gastrulation produces an oval, three-layered sheet known as the
A) chorion. B) blastula. C) embryonic disc. D) morula. E) blastocyst.
Neurohormones are hormones that specifically modify neural activity
Indicate whether the statement is true or false
Which of the following statements concerning the female mammary glands is true?
A. They are the organs of milk production. B. They may contain large amounts of adipose tissue. C. They are modified sweat glands. D. They are attached to the pectoralis major muscle by Cooper ligaments. E. All of the choices are correct.
Beta-adrenergic receptors stimulate the production of cAMP.
Answer the following statement true (T) or false (F)