[Answer] 10. The outer skin of a cell is called a what?

Step 1 : Introduction to the question "10. The outer skin of a cell is called a what?"

...1. Mitochondria 2. Nucleus 3. Membrane 4. Cytoplasm

[Answer] 4. A is for what part of the neurone that carries impulses away from the cell body?

Step 1 : Introduction to the question "4. A is for what part of the neurone that carries impulses away from the cell body?"

...1. Axon 2. Aneurysm 3. Aqueduct 4. Arachnoid Axons are usually coated in a white fatty substance called the myelin sheath which helps to speed the passage of impulses. They are sometimes called axones. An aqueduct is a canal or passage. There are two in the brain: the Sylvian aqueduct and the Cerebral aqueduct. The arachnoid is the delicate middle layer of the meninges. Its fine web-like appearance gives rise to its name. An aneurysm is a sac formed by a dilation in a vessel wall, usually an artery.

[Answer] 4. Photosynthesis and cellular respiration are opposite cell processes. One puts this compound into the atmosphere and the other one takes it out. Which compound fits this description?

Step 1 : Introduction to the question "4. Photosynthesis and cellular respiration are opposite cell processes. One puts this compound into the atmosphere and the other one takes it out. Which compound fits this description?"

...1. Nitrogen 2. Carbon Monoxide 3. Hydrogen 4. Carbon Dioxide Another substance that would have fit this description is oxygen, but it's an element, not a compound. Photosynthesis and cellular respiration are opposite processes because their chemical equations are reversed. Also, one stores energy while the other releases it.

[Answer] mammalian steroid hormones are signaling molecules that function in which of the following types of cell signaling?

Step 1 : Introduction to the question "mammalian steroid hormones are signaling molecules that function in which of the following types of cell signaling?"

...Endocrine glands are glands of the endocrine system that secrete their products, hormones, directly into the blood rather than through a duct. The major glands of the endocrine system include the pineal gland, pituitary gland, pancreas, ovaries, testes, thyroid gland, parathyroid gland, hypothalamus and adrenal glands.

[Ans] How long does it take a single human blood cell to make a complete circuit through the body?

Step 1 : Introduction to the question "How long does it take a single human blood cell to make a complete circuit through the body?"

The primary function of the heart is to pump blood through the arteries, ... into the pulmonary artery which takes the blood through the pulmonary circuit, and .... Red blood cells inside the capillary releases their oxygen which passes .... In rare cases, a patient will have one coronary artery that runs around the root of the aorta., The circulatory system, also called the cardiovascular system or the vascular system, is an ... Blood is a fluid consisting of plasma, red blood cells, white blood cells, and ... The systemic circulation can also be seen to function in two parts–a ... After their passage through body tissues, capillaries merge once again into venules ..., Click through this slideshow to learn about the heart. ... The circulatory system is composed of the heart and blood vessels, including arteries, veins, and capillaries. Our bodies actually have two circulatory systems: The pulmonary circulation is a short ... or frightened, the heart pumps faster to get more oxygen to our bodies., Your heart beats and sends blood all around your body. ... Arteries, which usually look red, carry blood away from the heart. ... through the blood and get stuck on a heart valve, this can cause this infection in the heart. ... Your heart is really good at it — it takes less than 60 seconds to pump blood to every cell in your body., The average human body carries ten times more bacterial cells than human cells 3 3. It can take a photon 40,000 years to travel from the core of the sun to its ... At over 2000 kilometers long, The Great ...