Explanation:
Muscles have to work in at least pairs as antagonists because they pull bones without pushing them. So, one muscle works to flex and the other to extend.
Isometrically is one version of how we can use our muscles. This just means that we can use more or less pressure but the distance will stay the same. An example is pushing on a locked door. While we have some muscles that move automatically, like our heart that moves without intention, our skeletal muscles are not among them generally.
Explanation:
The antagonist works to counter the torque of the agonist, often used in slowing down a motion. Occurring in pairs, the agonist and the antagonist often balance each other, one contracts and the other relaxes.
Explanation:
A tendon connects a muscle to a bone. It is typically a flexible but inelastic cord of strong collagen fiber tissue.
Ligaments connect bone to bone. Epidermis refers to the skin. Joints are the articulating parts of our body like the elbows and the knees.
Explanation:
Transverse refers to the plane dividing the upper trunk from the lower body horizontally. Lateral plane or sagittal plane divides the body into left and right sides vertically. The midsagittal plane is just like the lateral or sagittal, only it specifies the direct center of the body as the division line.
Explanation:
The order from superficial to deep goes stratum corneum (mostly dead, non-nucleated skin), epidermis, dermis, hypodermis, and stratum germinativum (the 5th layer and the basal layer).
Explanation:
Circumduction is a combination of abduction and adduction as well as flexion and extension, a conical movement usually originating at a ball and socket joint. Gliding is a planar joint (where two bones meet at a majorly flat articular surface) allowing bones to move along the joint's plane in any direction. Angular movements are defined by the fixed point from which they move, like a pendulum.
Explanation:
The epiphysis is the end of a long one. The endosteum is the thin layer of connective tissue that makes up the medullary cavity. The periosteum is a sheath of connective tissue enveloping the bone except at articulation.
Explanation:
Articulation is where two bones meet to form a joint. A ligament is a connective tissue that attaches bone to bone. Enthesis is connective tissue between a ligament and bone or between a bone and a tendon. The bursa is the fluid-filled sac found between bones at the joint to counter friction.
Explanation:
Visceral muscle is smooth muscle associated with the organs, especially those in the abdominal cavity.
Skeletal muscle is a form of striated muscle. Cardiac muscle is only found in the heart and is its own classification. Striated muscle is composed of sarcomeres which form contractile fibrils and then run parallel to one another in small groupings creating muscle marked in dark and light bands. It includes skeletal, cardiac muscle, and most of our other muscles.
Explanation:
Skeletal muscle is the correct answer, as voluntary refers to muscles that are generally under the control of the individual's will.
The cardiac muscle is what makes up the heart and is an involuntary muscle. Visceral describes the muscle type making up the intestines and most of the organs. Spindle fibers are actually proprioceptors in the bellies of the muscles.
Explanation:
Ligament translates from Latin, “to bind, tie.” Bone comes from old English, bon. Muscle is a Middle French/Latin derivative translating to “muscle, sinew”/“little mouse”.
