46. The smooth sustained contraction that is a result of a high frequency of stimulation is:…
3. Answer the questions below. You may use your text and any other resources you wish, please be sure to cite your sources! Submit your answers as a word document to the week 3 dropbox.…
The skeleton produces blood cells. Red bone marrow contains stem cells that produce all of the blood cells.…
Muscular System: The muscular systems is responsible for maintaining posture, circulating blood, and movement. Visceral muscle is found inside of organs like the stomach, intestines, and blood vessels. The stomach secretes acid and enzymes that digest food. The muscular system also has another variant which is skeletal muscle. The skeletal muscles are attached to bones and move various parts of the body. The biceps, pectoralis major, triceps, nasalis, and deltoid are five major organs in the muscular system. The biceps main job is to control the movement of the elbow and shoulder. The pectoralis major make up most of the chest bulk. The triceps help extend and retract the forearm. The nasalis compress nasal cartilage. The deltoid is responsible…
A tendon is a tough band of fibrous connective tissue that usually connects muscle to bone and is capable of withstanding tension. A joint is the location at which two or more bones make contact. A ligament is a short band of tough fibrous dense regular connective tissue composed mainly of long, stringy collagen fibers. Ligaments connect bones to other bones to form a joint.…
Skeletal muscle is under voluntary control. Nerve impulses that originate in the central nervous system cause muscles to contract. Both neurons and muscle tissue conduct electrical current by moving ions across cellular membranes. A motor neuron ends in a synapse with a muscle fiber. The neuron releases acetylcholine and transfers the action potential to the muscle tissue. The signal will travel through the tissue and trigger the contraction of individual sarcomeres. One synapse generally controls an entire muscle fiber. One motor neuron usually controls several adjacent muscle fibers. A group of fibers under the control of a single motor neuron is known as a motor unit.…
The Muscular System: Skeletal Muscle Tissue 1. Fill in the characteristics of the three muscle types: |Muscle Type |Cardiac |Skeletal |Smooth | |Shape of cell |Branching Cell |Elongated Cell |Spindle Shaped Cell | |# of nuclei |Single Central Nucleus |Multiple Peripheral Nuclei |Single Central Nucleus | |Striations |Visible |Visible |Lack of Visible | |Control |Involuntary |Voluntary |Involuntary | 2. What attaches muscles to bone?…
* Ligaments- Are a fibrous band of connective tissue that connect bone to bone and is to help maintain stability by limiting excessive movement.…
Tendons connect the muscle to the bone. When the muscle contracts this pulls on the tendon that is attached to the bone making the body part move. When the fibres the muscles contains contracts this makes the muscle work.…
1. Define a motor neuron:_____A single nerve cell that branches from the brain or the spinal cord to a muscle or a gland.…
Please provide an example of Homeostasis and Negative Feedback in our environment. Be sure not to duplicate a classmates' answer.…
Cardiac muscle cells are striated (for strength), multi-nucleated (for additional control) and branched (for added strength). Heart muscle cells must have the strength and the control needed for efficient heart action.…
The muscular system is what is responsible for the way that we move. Without the muscular system, we wouldn't be able to participate in the normal activities that we do today. There are 700 known/named muscles that are attached to the human skeleton. There are three different types of muscle that can be found in the human body. The Visceral muscle which can be found inside organs such as the stomach. This type of muscle is controlled by the unconcious part of the brain. This muscle is also known as the involuntary muscle. Cardiac Muscle is the second type of muscle found in the human body, and you guessed it, you can find cardiac muscle in the heart! Cardiac muscles are responsible for pumping blood throughought the human body. And these muscles…
The human body is amazing in so many different ways, but yet very complex. So many things are happening all at once. The human body is sustained by the skeleton which is composed of the three most important parts: bones, cartilage, and ligaments. The Skeletal System is composed of two-hundred and six bones. Each of the bones are connected to another bone by ligaments and or tendons. Ligaments are a strong, flexible, and fibrous tissue that connects two bones or cartilages or holds together a…
The Ocular and Visual System is part of the Central Nervous System. It allows an organism to see visual detail. It can interpret visual light, binocular representation and perception. The Visual System consists of the retina, optic chiasm, optic nerve, visual cortex, optic tract, lateral geniculate body and visual association cortex. The Ocular and Visual System can be damaged by the environmental and occupational exposure to toxic chemicals, vapors and gases. Therapeutic drugs also have the ability to produce side effects that can result in altering the structure and…