Answer:
a. myosin heads.
Explanation:
the ATP is what allows the myosin to dettach from the actin to continue the cross bridge cycle
Answer:
The correct answer to the question: The pineal body secretes which hormone that maintains the body´s internal clock, the 24-hour wake-sleep cycle, and regulates the onset and duration of sleep?, would be, C: Melatonin.
Explanation:
The process of sleep and wakefulness, also called the circadian cycle, its a pretty complex system that is controlled by several parts of the brain, but most importantly, structures of the diencephalon (vital is the hypothalamus), the pineal gland, and the stem of the brain. All these structures, and some others, respond to changes both in light perception by the eyes and other senses, heat, and homeostatic balances. These factor play a vital role in telling the human body that it is time for sleep, or to awaken. The pineal gland, as part of this melody, is essential, as it secretes the hormone, melatonin, in response to light changes. Melatonin will balance out the process of sleep, when it is secreted in high quantities by the pineal gland, and wakefulness, when it is no longer secreted in response to the presence of light. This is what is called the circadian cycle.
Answer:
The nervous system is a complex collection of nerves and specialized cells known as neurons that transmit signals between different parts of the body. It is essentially the body's electrical wiring. Structurally, the nervous system has two components: the central nervous system and the peripheral nervous system.
Explanation:Hope this helps :)
Answer:
We begins to digest the carbohydrates the minute the food goes to our mouth. The saliva which is secreted from our salivary glands moisten up the food when it is chewed. Salivary amylase is present in our saliva which begins the breaking process of sugars in the carbohydrates when we are eating. It is also referred to as ptyalin. Salivary glands are exocrine glands which makes saliva through a ductory system.Humans have three major paired salivary glands ( parotid, submandibular & sublingual)as well as hundreds of minor salivary glands. Minor salivary glands on the tongue leads to the secretion of amylase. Parotid gland assemble purely serous saliva. The other major salivary glands produce mixed saliva ( serous plus mucous). Another types of serous fluid produced by two layered serous membranes which lines the serous cavity.
