Answer:
When the level of calcium ions declines the sarcoplasm stops the sliding.
Explanation:
Sarcoplasm can be described as the cytoplasm for the cells of muscles. It contains important structures such as the myofibrils.
The following steps would occur when the level of calcium ions would decline:
The sarcoplasm would stop the sliding of the thin filaments.
The actin filaments would be migrated in the M line
This would lead the bands in the I region to shorten.
The Z region would compress.
The H region would diminish.
Answer:
The correct option is D. 18 year old male
Explanation:
The epiphyseal plate can be described as a disc of cartilage that is required for the growth of bones. The epiphyseal plates get fused in females at a very early age, most probably between the ages of 13 to 15. In males, the epiphyseal plates fuse a litter later at about 15 to 18 years.
Hence, the presence of epiphyseal plates in the femur would prove that it was present in an 18-year-old male.
All the other options would be false because they won't contain an epiphyseal plate.
<span>Stimulation of thoracic or lumbar spinal regions; impulse reaches chain ganglion; acetylcholine release</span>. Acetylcholine is released if the synapse happens in the sympathetic ganglion, if the synapse is in post-ganglionic neuron, norepinephrine is released.
