Exam 26: The Skeletal and Muscular Systems

A person who is bedridden for several weeks will see a decrease in bone and muscle mass. Blood vessels to muscles will shrink, and mitochondrial enzyme levels will decrease. -A bedridden person is at risk of what problem?

A new drug that mimics ATP but that cannot be broken down as ATP is in muscle would still allow muscular contraction to occur.

The vertebrae in descending order from the skull are

Which is not a bone of the lower limbs?

A sprain is a stretched or torn

A person who is bedridden for several weeks will see a decrease in bone and muscle mass. Blood vessels to muscles will shrink, and mitochondrial enzyme levels will decrease. -Which will be true of the muscles of a bedridden person?

If you were examining a biopsy sample of a leg bone,and the structure of the bone was spongy,you would know that the sample came from the end of the bone.

How did the inactivation of a gene that now encodes a nonfunctional myosin protein affect human chewing muscles?

Athletes who do more short bursts of intense activity will develop more fast-twitch muscle.

The type of skeleton that consists of fluid constrained within a layer of flexible tissue is a(n)

What causes a muscle cell to contract?

After death,muscles remain in a stiff position for several hours because ATP is required

The breast muscles of a wild duck are dark,while that of a domesticated chicken are white.The breast muscles in a domesticated chicken are

The precursor of bone is cartilage.

The temporalis and masseter muscles close the jaw while the platysma opens the jaw.To clench your teeth,you

Which bone,if examined,would show that you were working with something other than an upper limb?

The DNA sequences for a portion of the myosin gene are shown for humans and several non-human primates. The fragments start at nucleotide #26 in the gene, and shaded boxes highlight differences between the two sets of sequences. -What does the high level of similarity between the myosin gene sequences in human and non-human primates suggest?

If you placed an electrode on a person's triceps and stimulated the muscle,they would not be able to

Muscle rich in slow-twitch fibers is darker than muscle rich in fast-twitch fibers.

Skeletal muscle contraction is important in maintaining body temperature homeostasis.