The answer is sliding filament.
Muscle fibers are made up of myosin and actin filaments that straddle one another in alternating sequence. The myosin has myosin heads that act on the actin and enable the myofibrils to slide across each other in opposite directions. This causes the muscle to shorten hence contract. This is an energy-requiring process (hence hydrolyses ATP) and also requires calcium ions. In an animation, the myosin would seem to ‘walk’ on the actin filament.
Answer:
C. serous cells and mucous cells
Explanation:
Salivary glands consist of serious acini and/or mucous acini. The serous acini represent the serous fluid secreting part of the salivary glands and is composed of serous cells. The mucous acini are made of mucous secreting cells.
The parotid salivary glands consist of serous cells only while the sublingual glands and submandibular cells have both serous and mucous cells.
Answer:
organisms that can't make their own food are known as heterotrophs
More personal questions ask an adult
For examination of urine in case of infants, a collecting bag is attached to the child's skin. After attaching the urine collecting bag to the child's skin, a diaper is put on the baby, over the collecting bag. The bag is removed once the child has urinated.
Answer: THE DIAPER IS WORN OVER THE COLLECTING BAG.
