Which of the following are types of hereditary disorders? a. single-gene and chromosomal b. complex and duplex c. single-gene and duplex d. all of the above

For this question, it is a little tricky because of the presented options as answers. Single-gene and chromosomal are both types of hereditary disorders and also are one of the most common ones. Complex can be referred to as multifactorial and duplex might be referring to two single-genes, which might be something rare since it isn't an actual type of hereditary disorder. The answer to this question would most likely be A. single-gene and chromosomal. Choosing all of the above would also mean choosing what isn't true, so A. would be the most likely correct one.

Muscles in the body us with a lot of things for example, if i wanted to lift a heavy box and had no muscle i would just collapse where i was because of the fact muscles hold us together. overall they are 650 muscle in the human body, all of them have different purposes and ways to keep us together. there are three types of muscle in the body skeletal, smooth, and cardiac muscle. skeletal muscle are attached to the bone and with movement. smooth muscle, this is found in the wall of our organs, such as our stomach, this muscle with movement   as well, without this muscle, we would only be allowed to eat small amounts. the cardiac muscle is the heart muscle and probably the most important one. these are only found in the walls of the heart and the heart pump blood to the other parts of your body. we have two different types of muscle fibers, slow twitch and fast twitch. slow twitch muscles enable long-endurance feats such as distance running. fast twitch fatigue faster but are used in powerful bursts of movements like sprinting. there are three different types of muscle contractions concentric, eccentric, isometric. concentric contraction causes muscles to shorten, thereby generating force.   eccentric contractions cause muscles to elongate in response to a greater opposing force. isometric contractions generate force without changing the length of the muscle.: //athleticquickness.com/muscle-contraction-types-part-1/