In order for a reaction to occur, energy is needed to break the bonds that already exist in the reactant molecules; that energy is called the _________ energy
Fill in the blank with correct word.
activation
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Chemical messengers released directly into the bloodstream, with the ability to affect cells for hours or days, are called ________
A) Hormones B) Dendrites C) Neurotransmitters D) Sensory cells
How does the brain distinguish high-pitched from low-pitched sounds?
A. High-pitched sounds cause the cochlear nerve fibers to fire more rapidly. B. High-pitched sounds stimulate hair cells near the tip of the cochlea. C. Low-pitched sounds stimulate hair cells near the tip of the cochlea. D. Low-pitched sounds cause the cochlear nerve fibers to fire more rapidly. E. High-pitched sounds cause the basilar membrane to vibrate more vigorously.
Using the figure below, identify the labeled part.
1) Label A: ______________________________
2) Label B: ______________________________
3) Label C: ______________________________
4) Label D: ______________________________
5) Label E: ______________________________
6) Label F: ______________________________
7) Label G: ______________________________
8) Label H: ______________________________
9) Label I: ______________________________
10) Label J: ______________________________
11) Label K: ______________________________
12) Label L: ______________________________
13) Label M: ______________________________
14) Label N: ______________________________
15) Label O: ______________________________
16) Label P: ______________________________
Answer the following statements true (T) or false (F)
1. The erectile tissue in the female external genitalia is the mons pubis. 2. The first menses is referred to as menarche. 3. The secretory phase is the part of the female reproductive cycle from ovulation to the beginning of menses. 4. The blood level of estrogen is at its highest during the secretory phase of the female reproductive cycle. 5. The proliferative phase is the part of the female reproductive cycle from the end of menses to ovulation.