Explain why the Na+ ions diffuse into the neuron when the Na+ channels open.
What will be an ideal response?
Na+ is more concentrated outside the cell than inside; hence the concentration gradient causes diffusion into the cell.
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Infertility may result when an STD leads to
A) menarche. B) premenstrual dysphoric disorder. C) polycystic ovary syndrome. D) pelvic inflammatory disease. E) menorrhagia.
Which of the following muscle types are myogenic?
a. cardiac muscle b. single-unit smooth muscle c. skeletal muscle d. both (a) and (b) above. e. all of these answers.
Moving from superficial to deep in a bone, the parts of the bone would be encountered in which sequence?
a. periosteum, endosteum, medullary cavity b. endosteum, periosteum, medullary cavity c. periosteum, medullary cavity, endosteum d. endosteum, medullary cavity, periosteum
A positively or negatively charged particle is called a(n) ____________________.?
Fill in the blank(s) with correct word