Name __________________ Date _________ Internet Challenge #1: The Human Body   Welcome back to The Internet Challenge on the Human Body. Let's learn about The Muscular System and The Nervous System in Part II of this Challenge. Let's travel back to the same website ("The Human Body") - Type in the URL: http://tqjunior.advanced.org/5777/ Scroll down the page to "Meet Your Tour Guides." Click on "Our Human Body." Under "Movement," click on "Muscular." Read the text. Click on "Skeletal." Skeletal muscles make up _______% of your body's weight. There are ____________ individually named skeletal muscles. The deltoid is the skeletal muscle that moves the shoulder and the upper arm. True or false? Skeletal muscles are voluntary, consciously controlled muscles. True or false? Explain why a person might get a cramp or spasm when they're overworking their muscles. ________________________________ Awesome answers! Click "Next" (at the bottom of the page). "Smooth Muscles" will appear on your screen. Read the text and answer the following questions. List the four hollow parts of the body where smooth muscles are found. __________, ____________, _______________________, and _____________________. Smooth muscles are __________________ muscles that we can't consciously control. In addition to controlling the smooth muscles, the autonomic nervous system controls many systems without us being aware of them. True or false? Way to go! Click "Next" (at the bottom of the page). "Cardiac Muscles" will appear on your screen. Read the text and answer these questions. Cardiac muscles contract (shrink) automatically to squeeze the walls of the heart inward. True or false? Does the cardiac muscle ever get tired? Yes or No? Ok! We've completed The Muscular System. Let's continue to The Nervous System. Click "Next" at the bottom of the page. Scroll down the page. Under "Energy," click on "Nervous." Click on "Central Nervous System" or "CNS." Read the text and answer these questions. How does the brain communicate with the rest of the body? _________ The spinal cord's thickest nerve is _________ inch thick and its thinnest nerve is thinner than a ___________ ________________. The spinal cord is a thick bundle of nerves connecting your __________ to the rest of your _____________. Impressive detective work. Keep it up! Click "Back." Scroll down the page and click on "Nervous" under "Energy." Click on "Peripheral Nervous System" or "PNS." Read the text. Answer these questions. The peripheral nervous system is made up of _______________ that are connected together throughout the body, similar to a __________ system. Messages from one neuron to another keep the body ______________. Can nerve cells be repaired if damaged due to injury or disease? Yes / no? :-) (Computer smiley face!) Click "Next" (at the bottom of the page). "The Endocrine System" will appear on your screen. Read the text and answer these questions. A hormone is carried by the _______________ from the endocrine gland to a specific tissue in the body. Which is the most important endocrine gland in our body? ___________ What does the pituitary gland do for our body? __________________ Why do you grow faster at night? ___________________________ :-) :-) Click "Site Map" (at the bottom of the page). Scroll down the page to "Senses" and click on it. Look at the picture of our brain. Read the text and answer these questions. How many senses are there? _______________________ The external sensory system tells you about the world outside your body. True or false? Our sensory organs send signals to our control center in our body, the ______. Click here to check your answers. Very good answers! You've finished Part II of the Internet Challenge that focuses on The Muscular System and The Nervous System. Our body is very complex, isn't it? **End of Part II of The Internet Challenge &endash; The Human Body, The Muscular and The Nervous Systems **   Part I | Part 2 | Part 3 | Part 4 | Part 5 | Teachers |