Briefly explain how mitosis and meiosis differ
What will be an ideal response?
Mitosis occurs because new cells are needed for tissue growth or repair, and these new cells need to be genetically identical to the original cell. So, the process of mitosis occurs by first making a complete copy of the DNA and then dividing each cell into two so that each resulting cell gets one copy of the DNA. In contrast, meiosis produces sperm and ova for reproduction. These cells need to have half the chromosome number of the original cell so that when they combine to form a new cell, the chromosome number will not be doubled. Also, meiosis mixes up the possible combinations of genes that each sperm or egg cell will receive, to produce a genetically unique individual. Meiosis I includes the unique set of steps that reduce the chromosome number and shuffle the alleles. Meiosis II then completes the process to potentially form four daughter cells.
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The potential space between the ________ membranes is called the pleural cavity.
Fill in the blank(s) with the appropriate word(s).
In a recording of a muscle twitch, the delay between the time a stimulus is applied and the time the muscle responds is called the
A. relaxation period. B. contraction period. C. refractory period. D. latent period.
Which ligament connects the clavicle and the acromion?
A) coracohumeral B) coracoacromial C) coracoclavicular D) glenohumeral E) acromioclavicular
John encounters a bear while hiking. His heart will respond in all of the following ways except
A) increasing preload. B) increasing heart rate. C) increasing contractility. D) decreasing heart rate and contractility. E) increasing venous return.