Answer the following questions true (T) or false (F)
1. Small amounts of testosterone are made in the ovaries and adrenal glands of females.
2. The endocrine system helps maintain homeostasis through positive feedback.
3. The hypothalamus makes the hormones that are released from the posterior pituitary.
1. TRUE
2. FALSE
3. TRUE
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In the dark, the Na+ channels in the outer segments of rod cells are
A. open. B. closed. C. primarily affected by inhibitory neurotransmitter input. D. important in making the cell hyperpolarized in this resting state.
A male who inherits an extra X chromosome will have
A. Klinefelter syndrome. B. Turner syndrome. C. Down syndrome. D. Polyploid syndrome. E. Edward syndrome.
Meselson and Stahl distinguished between parental and newly-synthesized DNA by using
A) heavy metal. B) heavy and light forms of nitrogen. C) nucleic acid dyes. D) chromosome paints.
Some protists possess cilia and flagella. Cilia and flagella share a common organizational structure. If a protist possesses both cilia and flagella, is it more likely to have a greater number of cilia or a greater number of flagella?
A) Cilia B) Flagella