Hormones from the adrenal medulla increase
A) heart rate. B) all of the above.
C) breathing rate. D) blood pressure.
B
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Before an olfactory receptor can detect an odorant, it has to
A) contact a basal cell. B) bind to receptors on olfactory dendrites. C) open ion channels. D) respond to applied pressure. E) be transported to the olfactory bulbs.
The foremost teeth used to bite into food are called ________________________________________
Fill in the blank(s) with correct word
Answer the following statements true (T) or false (F)
1. One function of the sex hormones is to stimulate the development of the secondary sex characteristics. 2. When the tunica adventitia enters the testicle it is called the seminiferous tubule. 3. The bulk of the testes is made up of interstitial cells that produce testosterone. 4. Sperm precursors or stem cells are called spermatogonia. 5. Under the influence of FSH, the spermatogonium divides to form two primary spermatocytes.
Which of the following cell types is formed at the end of the first meiotic division?
A. Primary spermatocyte B. Secondary spermatocyte C. Spermatogonia D. Spermatid E. Sperm cell